From Destinypedia, the Destiny wiki
Eris Morn is a Hunter and member of the Hidden who serves the Vanguard as their expert on Hive lore. She is the sole survivor of the ill-fated fireteam led by herself and Eriana-3 that attempted to assassinate Crota after The Great Disaster. After guiding The Guardian on the path to Crota's destruction, she helped coordinate the fight against Oryx, the Taken King while maintaining secret alliances with Queen Mara Sov of the Reef and the exiled Warlock Osiris. During the Age of Triumph, Eris left The Last City to gather more information on future Hive threats with the help of Mara.
After discovering the growing threat of Savathûn and hints that the Darkness was closer to humanity than they believed, Eris returned to the Last City to warn the Vanguard before venturing once more to the Moon. There she uncovered the existence of a Pyramid beneath the surface and guided the Guardian in investigating its purpose and fighting the Daughters of Crota. Eris delved deep into the secrets of the Pyramid and the Darkness as the Black Fleet arrived in the system. Although sorely tempted by the power the Darkness offered, Eris formed an alliance with the Exo Stranger and The Drifter to learn how to utilize Stasis safely as a tool against their foes.
As with all Guardians, Eris does not remember her life before being resurrected by her Ghost. However, a series of messages sent to the Guardian from an unknown source seemingly provides an account of her first life. Narrated by both "Medusa", a self-proclaimed craftmind from the Golden Age, and by Eris herself, these messages are gathered in the Lore book "Truth to Power".
The messages claim that in her first life, the woman who would be reborn as the Guardian Eris was named Erisia Pyatova-Hsien. She lived in St. Petersburg, Russia in the 22nd century, during the Golden Age. She was a skilled swimmer and enjoyed swimming in the Neva River during her youth and adulthood. In her late thirties, she died during an ill-advised and unassisted winter swim across the Neva. The messages were poorly encrypted in some Glimmer the Guardian had retrieved and were then forwarded by the Guardian's Ghost to Ikora Rey and her Hidden agents. Fellow agents who worked side by side with Eris Morn and Eris herself (who was confirmed still active in the field) denied that Eris sent any of the messages attributed to her.
Ikora Rey then started an inquiry, assigning an investigation to her Hidden agents. One of the agents, FEN-092, compiled a report which details photographic and video evidence that Eris was born a child of the Last City over 300 years before civilian parents in a neighbourhood inhabited by civilians and Guardians alike. This was corroborated by Ghost recordings from the period and a double-blind forensic analysis.
The Great Ahamkara Hunt
When the Ahamkara on Venus began warping the world in dangerous and unexpected ways due to the strength they gained from wishes made by Guardians seeking more power, Eris participated in studying the effects of the Ahamkara, but as timelines began to fracture and some Guardians were driven to suicide by the paracausal phenomenon, the Vanguard prepared to exterminate them through the Great Ahamkara Hunt. Eris wrote to her friend Queen Mara Sov of the Reef to warn her of the coming hunt and shared her fears that some Ahamkara would flee to the far edges of the Sol System to escape the Vanguard's reach. She pleaded with the Queen to kill any Ahamkara that entered her realm on sight if she truly cared for her people, as they were too dangerous to be left alive and used.
In the early days of the Great Hunt, Eris was assigned to work with Wei Ning to eliminate seven Ahamkara. The fight with their first target lasted an entire day, as Eris watched Wei Ning fight their foe in hand-to-hand combat. She started to believe that Wei Ning was insane, a fear that was given strength when the Titan admitted to wishing that the fight would never end. Eris was horrified and told her to stop, as they needed to kill their other targets as well, but Wei Ning asked her to trust her. An hour later their other targets arrived, having been drawn in by the power the seventh was gathering from Wei Ning's wishes. Pulling out her Arc blades, Eris Blinked and began her bloody work culling the Ahamkara. As their last foe felled, Eris believed she heard Wei Ning whisper something and asked what she said. However, the Titan stated she was about to ask her the same thing, leaving the two Guardians confused.
Eris was later tasked to work with the Warlock Ikora Rey against an entire army of Ahamkara. During the battle, they whispered offers to Eris and showed her images that she believe came from her life before being revived as a Guardian. After an hour-long battle, the two emerged victoriously and gazed upon a mile of Ahamkara bones. As they prepared to destroy the bones and their whispers, Eris asked Ikora what they offered her. The Warlock stated that they probably offered them the same thing. Eris remained disturbed and stated that everything the Ahamkara said was true. Ikora warned her that sentiments like that led to morbid places and told her to take her Light north while she cut south. Eris was still focused upon what they showed her, but Ikora told her to focus as the two began summoning a storm of Light to destroy the bones. The whispers from the remains of the Ahamkara grew as their work progressed, to the point where Eris could not discern between the storm and the whispers.
A year into the Hunt, Eris fought alongside Zavala and Lord Shaxx against one Ahamkara. After they mortally wounded the beast, Eris and Zavala watched as Shaxx laid a hand on its snout. She wondered if he was gloating, but Zavala believed he was too pragmatic for that. Eris then suggested he might be mourning, which Zavala thought was a possibility. The Ahamkara began to glow then, causing Eris and Zavala to shield their eyes as it exploded. When they looked back Shaxx was standing in a crater and covered in green flames. As Eris and Zavala prepared to say something, Shaxx quieted them and told them to listen. They all heard a disembodied whisper but were used to such things by then. Despite her concerns about the Ahamkara and the disturbing whispers from their bones, Eris kept a fragment of bone from the Great Hunt.
The Hunt for Crota
Following the Vanguard's failed attempt to reclaim the Moon from the Hive during The Great Disaster, Eris met with the Praxic Warlock Eriana-3. Together, they sought to discover a way to kill the Hive Prince Crota, Son of Oryx, who led the Hive on the Moon and was responsible for the deaths of thousands of Guardians. When their research brought no answers, they sought out Toland, the Shattered, an exiled Warlock who was said to be insane but had unmatched knowledge of the Hive. From him, they learned that Crota could be killed for good if they entered the Ascendant Realm and slew him in his throne room. Armed with this knowledge, Eris, Eriana, and Toland recruited three more Guardians for their mission: the Titan Vell Tarlowe and the Hunters Omar Agah and Sai Mota. Eris began to learn Hive lore from Toland, who explained how when Crota's will was challenged, he would unleash Ogres known as the Might of Crota. She questioned if he had learned this knowledge from The Speaker, but Toland claimed to have received it from the Darkness itself.
After landing on the Moon, the fireteam began to walk towards the Temple of Crota while questioning Toland about the Hive champions they would be facing. As they discussed the thousands of Guardians killed by the Blades of Crota and others like them, Eris worried that Light would not be enough for them to emerge victorious. Eriana told her that they could just take the blades of their foes and use those to cut them down if necessary. Eris was deeply concerned about using a weapon of the Darkness to fight their enemies, and Eriana claimed she would do anything for vengeance. Eris told her friend that she prayed it would not have to come to that. When Vell commented that he wished to kill Sardon and the Swarm Princes, Eris reminded him that their mission was to kill Crota, but Toland told her that the Hive Prince's lieutenants were extensions of him. Vell reassured her he had faith in all their Light, but Eris did not believe that faith would help and told him that they had no time for individual battles and must fight together as a unit.
Inside the Temple of Crota, the Fireteam heard screams from deep in the Hive tunnels. Toland told them the screams came from Omnigul, Will of Crota, and that they signified the birth of new spawn in the service of Crota and that if they killed her, Crota's threat in the physical world would be ended. Eris declared that they would follow her screams deeper into the tunnels. As they descended, the fireteam suffered their first casualty: Vell was overwhelmed and killed by Thrall.
Eris, Omar, and Toland were separated from Eriana and Sai soon after Vell's demise. As they moved through the tunnels, Eris told them that she would feel something watching them. Toland explained that those were Crota's eyes, leading the Guardians to be sacrificed to wake Crota by draining their Light. Eris berated him for holding onto his secrets like weapons and asked if he meant to damn them all. Toland told his secrets were weapons and that they could use them to complete their mission, directing her and Omar to hunt the Eyes of Crota, kill them, and then follow their draining Light to where Crota waited. This plan also failed, and Eris was separated from Toland and believed Omar to be dead after another encounter with the Hive. As she skulked in the shadows of the tunnels to avoid the Hive, she heard screams from below and followed them into the darkest chambers of the Hive, where she saw that Omar had been captured by a Wizard called the Heart of Crota. Eris watched in horror as the Wizard flayed the Light from her fellow Hunter and used it to feed newly spawned Thrall. After seeing this, Eris believed Omar to be dead when actually, his soul was transferred into a Hive bug that she would later use to create Xenophage for the Young Wolf.
With the rest of the fireteam dead and her Ghost drained of Light and eventually perishing as well, Eris was left alone in the depths of the Hive's warrens. With little option, Eris held the bone of an Ahamkara she kept since the Great Hunt that began to whisper, guiding her way through the lunar tunnels. Against all odds, she managed to survive in the Hellmouth's shadowy warrens for years using their dark tactics against them, despite her previous concerns about wielding weapons of Darkness. She lost her eyes to the Hive but replaced them with those of an Acolyte, the third eye included. Eris learned much about the Hive, its hierarchy, and how to wield some of their magic. She also had access to a copy of Toland's journal, which aided her greatly in her staying alive in the warrens and expanding her knowledge of the Hive.
Return to the Tower
Eris eventually escaped the Hellmouth and returned to the Last City alive, but vastly changed by the experience. As she recovered from her experience she was cared for by her friend Asher Mir. Thanks to his compassion, Eris regained some hope and recovered some sense of her old self. Her continued obsession with defeating Crota and newfound knowledge of the Hive made her a pariah back at the Tower, but though the Speaker and Commander Zavala believed her fascination with Hive lore unhealthy and made her untrustworthy, Ikora Rey secretly employed her as a member of the Hidden to infiltrate and keep watch on the activities of the Darkness. Though she worked for Ikora, she also conspired with Osiris and Queen Mara Sov of the Reef.
Eventually Eris informed Ikora that the Hive were becoming more active, and that Omnigul had left the Hellmouth. She was concerned that the Hive was targeting the Warmind Rasputin in the Cosmodrome, and that if such a being was twisted by the Hive all would be lost. Ikora asked her to remain at the Tower to aid in the battle against the Hive and promised to convince the other Vanguard leaders to listen to Eris, while also promising to find Guardians to aid her.
War against Crota
After learning of a newly risen Guardian who raided The World's Grave on behalf of the Speaker, Eris summoned the Guardian. She declared the Speaker a fool for not seeing that the true threat was Crota and for clinging to his belief in a dead god, and tasked the Guardian with slaying the Swarm Princes and destroying the Sword of Crota, which the Vanguard mistakenly believed had been destroyed long ago. After they succeeded, Eris requested they kill Sardon, Fist of Crota, who was leading the Hive in the Cosmodrome in preparation for the revival of Crota's soul. As they hunted Crota's general, Eris explained to the Guardian Sardon's role in conquering the Moon and how she survived for years in the Hive's warrens there. The Guardian defeated Sardon, but Omnigul was spotted in the Cosmodrome as well, and Eris requested that the Guardian return to the Tower to discuss their next step.
Eris learned that Omnigul was targeting Rasputin, proving her previous concerns about the Hive's plans correct. She sent the Guardian to stop Omnigul from destroying or corrupting the warmind, which would allow the Hive to invade Earth without worrying about Rasputin's defenses. Eris was surprised when Rasputin allowed access to his bunker, and was shocked to discover Omnigul had already found a way inside. The Guardian stopped Crota's mate, who fled to safety, and Eris noted that the Hive on Earth were more powerful than she had assumed. She summoned the Guardian back to the Tower to discuss how they would stop the Hive from waking Crota's soul. Despite this victory, Eris was concerned about why Omnigul fled, as she usually feasted on Light, and feared that she may have found what she was looking for in the bunker. Eris was also cautious of Rasputin's motives and wondered if its survival of the Collapse came at some cost to humanity.
With Rasputin safe, Eris tasked the Guardian with going to the Temple of Crota and stopping the Wakers of Crota from beginning a ritual to restore Crota's soul. When the Guardian arrived, they discovered that the ritual had already begun, and Eris desperately urged them onward to stop it from being completed. After the Guardian destroyed the Wakers, Eris directed them to destroy the crystal that the Wizards were using for the ritual. Once it was destroyed she thanked the Guardian for banishing Crota's soul and bringing her some measure of vengeance for her fallen friends. With Crota's soul banished, Eris declared that Omnigul now had to die in order to truly ensure that Crota could not return to the world. She had located Omnigul in the Skywatch, where she was creating a new Hive army to carry out Crota's will. Once the Guardian slew Omnigul, Eris thanked them and hoped that her friends would now find some measure of peace. She rewarded the Guardian with the Fusion Rifle Murmur. She also explained that many of Crota's disciples still walked the Moon and Earth, and suggested they find a way to enter the Hellmouth and find a way to destroy Crota for good.  Eventually, the Guardian also killed Crota, venturing into the Ascendant Realm and slaying him at his Oversoul Throne.
The Taken War
With Crota's death, Eris turned her attention to his master and father, Oryx, and for this purpose she turned to Queen Mara Sov of the Reef and the exiled Warlock Osiris for help. The three met in the Queen's throne room in the Reef, where Eris declared that she had no wish to play any games of politics with them and was only there to ensure a united front met Oryx when he invaded the system. The Queen agreed with her, and the three began plotting to end the Taken King. She kept her alliance with the Queen and Osiris secret from the City's leadership. During the Wolf Rebellion she secretly met with Prince Uldren Sov at the Vestian Outpost, avoiding the other Guardians who were now allowed into the Reef. She informed Uldren that she had news from the beyond that the Queen needed to hear. Together they formed a plan to defeat Oryx; the Awoken would prevent his fleet from entering the inner system, while Eris would help the Guardians enter the Dreadnaught and defeat Oryx. She is one of the guides in The Taken King, and among the first to detect the threat of the Taken.
Cayde-6 liked to refer to her as his "creepy sidekick" in their efforts to stop Oryx, much to her immense annoyance. When Eris found out that her ship was destroyed in Cayde's mission to board the Dreadnaught, she is enraged at Cayde for the loss. Despite her anger, she still worked with him to help bring down Oryx. However, once Oryx is defeated permanently, she refused to let go of her anger.
After the Taken King's defeat, Eris aided the Guardians in slaying would-be contenders and pretenders to Oryx's throne. Chief among them were Alak-Hul and Malok. In regards to the Darkblade, she hoped to gain a sense of vengeance as Alak-Hul was present during her old teams raid against Crota and caused some of their deaths. She also knew that Alak-Hul could nonetheless make a worthy successor to Oryx and, thus, he had to be taken out from within his prison. Guiding the Guardians to the prisons within the Dreadnaught, Eris lead them to Alak-Hul's black cell and, after a tense battle, they succeed in slaying the Darkblade.
Malok, Pride of Oryx, attempted to assume Oryx's place by taking over the Taken brood with his mastery of the Blights and lead an all-out assault on the Last City. However, thanks to Eris's guidance and tips from Variks, the Guardians drove Malok out of the Dreadnaught and onto the Shrine of Oryx on the Moon. There, the Guardians slayed the would-be contender to the Osmium Throne.
Last Days in the Tower
During the Festival of the Lost, Eris was approached by Cayde-6, who then told him to leave if he did not have a replacement ship for her. Cayde attempted to get her into a more festive mood, but Eris dismissed him by listing all that she had lost, in addition to her ship, including her friends, and her Ghost. He offered her a sweet treat from a smuggled package that Kadi 55-30 had confiscated, which Eris refused and bid him once more to begone until he had a new ship.
Eris reluctantly assisted Eva Levante in decorating the Tower during the Dawning. Eris viewed the festival as trivial and a waste of time while the servants of the Darkness still lingered. Eva attempted to convince her that joy and hope were important in fighting the Darkness, but Eris viewed it all as pretending. Eva stated that only joyful Guardians could defeat the Darkness, and that holding the Dawning festival was her way of making that happen, causing Eris to sheepishly wish her a happy Dawning.
Shortly after the Dawning, Eris visited an old friend in the hospital, a Warlock by the name Asher Mir. She spoke to his catatonic body, telling him her time in the City was over, as she had accomplished all she set out to do there. She decided to find a new way to eliminate the Hive, and that she could not find it within the City's walls. Before leaving, she spoke a grim warning; that a "storm" was coming, and she would not be with them when it broke. This "storm" was widely assumed to be the Red Legion's attack on the Last City. However, it has been suggested that instead, the storm is yet to come, implying that everything that has taken place in Destiny 2 is simply the "rain" before the "storm".
Eris's departure is noted by the Vanguard and the Guardians, as they originally had hoped to ask her for further advice on the new Hive broods encountered on Titan. However, Zavala states that no one has seen or heard from Eris since before the Last City fell. After the Traveler's reawakening and the liberation of the Last City, there was still no news of Eris.
At some point following her departure, Eris sends a message to Asher Mir, stating that she has built a ship out of Hive Chitin and discovered a throne world created in the Ascendant Realm built for a being aligned with the Light.
Eris possibly makes contact with the Guardian in the Dreaming City, revealing the existence of the time loop that sustains Riven and that she has recovered memories of her pre-Guardian life. During her communication, however, several bizarre glitches occur in her speech that is eventually revealed to be due to her actually being a Golden Age craftmind, Medusa. However, then it seems that the Medusa communicating with the Guardian is actually a simulation run on the mainframe of Quria, Blade Transform, seeking a way to overcome its Taken state. Then it seems that this was itself a lie, and Quria is really under the control of Dûl Incaru, an Ascendant Hive Wizard and daughter of Savathûn, seeking to gain control of the Guardian by inundating them with riddles. However, the Dûl Incaru speaking to the Guardian turns out to be another simulation created by Quria, and the real Medusa takes control of her own simulacra and breaks the simulation. Finally, it is revealed that the narrator is and always has been the real Eris Morn, who panicked upon realizing she had wasted time talking about her past and felt that the Guardians would lose respect for her if she admitted she wasn't above such emotions as loneliness. She bitterly remarks that by now the Guardian likely does not trust her identity, and bemoans her paranoia. Due to the erratic nature of the communications, it is unclear who, or what, the true identity of those messages is. One of the Hidden, agent FEN-092, mentioned that Eris has personally denied sending these message. 
Eris searched for answers on Luna following the events of the Red War and the conflict with the Scorn. However, her Stone began to whisper again, taking her deep beneath the moon's surface. After traversing deeper, she touched a black surface and unknowingly unleashed a curse upon Luna. Soon enough, Eris found herself being haunted by the ghosts of her former fireteam. Worse, the Hive of the Hidden Swarm construct a massive crimson fortress, the Scarlet Keep to take advantage of a structure she found, the Pyramid.
The Guardian went to the Moon to investigate the Hive's resurgence and of the Scarlet Keep but soon encounter various phantoms of fallen Guardians as they traverse beneath the keep. As the Guardian finds the Pyramid structure, they come under assault of powerful phantoms taking the appearance of various foes they have bested in the past. However, before the Guardian is overwhelmed by the phantoms of Crota, Son of Oryx, Dominus Ghaul and Fikrul, the Fanatic, Eris Morn uses her enchantment to pull them out of danger and to her position. Safe, the Guardian meets with Eris who states her theory that the Pyramid may in fact be a remnant of the Darkness that brought the Collapse, possibly wrecked and hidden on Luna after being smited by the Traveler. Eris further reveals that the phantoms they encountered are in fact Nightmares created by the Pyramid's energies and utilized by the Hive. Knowing of the knowledge and secrets within, Eris begins working with the Guardian to find a way inside.
Setting up a base just outside Sorrow's Harbor, Eris begins formulating a plan to enter the Pyramid and combat against the Hidden Swarm. Further, she has the Guardians hunt down the various Nightmares that have begun to appear across the system, taking the image of the Guardians most notorious foes, such as Skolas, Taniks, Phogoth and Omnigul. Knowing that the Hive must possess the knowledge needed to combat the Nightmares, she has the Guardians investigate the Keep and the Hive's rituals. The Guardians manage to disrupt various rituals but encounter the architect of the Keep itself, Hashladûn, Daughter of Crota. Eris originally believed Hashladûn and her sisters were dead following the fall of their father but now realizes that the eldest of Crota's daughters seeks retribution against the Guardians for ruining her lineage. Eris has the Guardians give chase as Hashladûn retreats into the keep. Ascending the Tower of Woe, Hashladûn corners the Guardians but despite her sorcery and use of the Nightmares, they slay the daughter of Crota. From her remains, the Guardians learn that Hashladûn and her sisters managed to protect themselves against the Nightmare's influence and utilize them from a forbidden piece of arcane knowledge, the Cryptoglyph located in the darkest location of the Hellmouth, the Catacombs.
Despite the danger and complete Darkness, the Guardians agree with Eris plan that the Cryptoglyph is essential in combating the Nightmares and unlocking the Pyramid. Though Eris originally planned to pull the Guardian out of the Catacombs once they've acquired the artifact, she loses contact with them as they entered the forbidden sanctum. Fortunately, the Guardians managed to reach the Crytoglyph and slay its keeper, Besurith, Daughter of Crota. Racing back to the surface, Eris is relieved that the Guardians are safe and gained the artifact. With the Cryptoglyph, Eris manages to learn how to create the armor necessary to battle the Nightmares and has the Guardians hunt for more Nightmares to fuel the essence necessary to complete them.
With the armor and weapons, Eris has the Guardian meet with Ikora Rey at the overlook near the Pyramid. The Warlock Vanguard stated that she had to see it for herself and wondered how long the Pyramid had been waiting or watching. Regardless, Eris arrives, though smothered by the ghosts of her former fireteam. Eris soon grows furious with the phantoms taunts and torments, screaming at them to be silent. Though Ikora voices her thoughts she can't help but feel responsible for her torments and for not truly listening to her warnings, Eris brushes off her concerns, very well knowing that she didn't come to apologize. Acknowledging this, Ikora then states that those who brought their Collapse are coming back and tells Eris that the Vanguard is at her disposal. With everything said, Eris states that there is much work to do and has the Guardian follow her to prepare for their mission to enter the Pyramid.
Having everything they require to enter the Pyramid, the Guardian ventures to the structure but find themselves drawn into the Pyramid, as if welcomed. Inside the Pyramid, the Guardians battle against the Nightmare of Crota, Son of Oryx, the Nightmare of Dominus Ghaul and the Nightmare of Fikrul, the Fanatic, all the while being taunted by the voice that has taken control of their Ghost. Despite this, the Guardian defeats each of the Nightmares and at a mysterious altar, they acquire a strange spherical artifact. After taking it, they appear transported to a place that resembles the Black Garden and encounter a mirrored image of themselves, apparently representing the Darkness itself. Calling itself not their enemy nor their friend, the mirrored projection calls itself their "Salvation".
Returning to Eris following their discovery, Eris scoffs at the message of salvation, she takes it as confirmation that the Darkness is about to return. She also acquires the artifact from the Guardian to study though Eris hears whispers form it, she only takes them as attempts to manipulate them. In the meantime, Eris has the Guardians continue on with the Nightmare Hunts to contain the Nightmares that continue to haunt the system.
The Vex Offensive
Shortly after the Young Wolf returned from the Pyramid, Vex began pouring out of a gate to the Black Garden on the Moon and invaded the lunar surface, being drawn by the dark influence of the Pyramid. Meeting with the Young Wolf, Eris warned that the Vex threatened the Vanguard's presence on the moon and that they must be stopped before they cut off their access the Pyramid and any hope they had on stopping the Nightmares. Eris noted that she needed to keep her focus on researching the Pyramid and requested that the Young Wolf work with Ikora to drive back the Vex and keep her sanctuary secure before too many Vex invaded the moon. She also asked that they discover the motivations of the Vex and share that information with Ikora.
A team of Guardians entered the gate and slew two powerful Vex minds within and discovered traces of the Darkness. Their success caused the mysterious Darkness artifact to come to life and emit another message. Eris was visited by the Young Wolf and explained what had occurred before declaring the Darkness meant to play them as puppets listening only to what it said. She dismissed the messages from the Darkness as manipulation and warned them not to trust anything the Darkness said and to discard further messages. She worried that these messages were meant as a means to distract the Guardians from their task and sow seeds of doubt so that the Darkness could win against them. Despite her worries, Eris resolved to continue studying the artifact.
Sometime later, the Phantoms that continue to haunt her, soon begins to take its toll on Eris. Resolving to help Eris, the Guardians journey throughout Luna's surface and find various relics and mementos left behind by her former fireteam. Among them, they find Sai Mota's repaired necklace, Vell Tarlowe's Reforged Mark, one of Toland's lost journals, Omar Agah's Brace of Knives and Eriana-3's Letters from Wei Ning. With each keepsake, Eris is able to make peace with the fates of her friends and the phantoms that once haunted her, disappear.
Later, Eris enters the Pyramid herself and approaches the altar of the veiled figure. Touching the altar, her Stone appear to absorb a strange element born of the Darkness. At first shocked, Eris resolves to absorb the unidentified energy and leaves with a faint smile.
Several months after the battle on the Moon, a fleet of the Pyramids venture into the system, with one of them touching down on Io. The power of the Pyramid beckons Eris there, and she heeds the call to learn whatever she can. When she reaches Io, her attempts to hear the Darkness are disrupted by Savathûn, who jams the Pyramid's broadcasts and sends Taken to intervene. She is slowly overwhelmed and the Guardian, who is following her on Zavala's orders, is cut off from her as they take separate routes through the Cradle. Though injured, Eris manages to overcome the Witch Queen's power as she finds a Tree of Silver Wings, with a seed growing at its base. She tries to claim it but finds she can't touch it, and is forced to let the Guardian have it.
Eris then returns to the Tower and meets Zavala in his office for a debrief on what has happened. Eris tells Zavala that she intends to return to Io, but the Vanguard Commander pleads with her not to go any further. She leaves anyway, determined to figure out what Savathûn and the Darkness want. She returns to the Cradle, only to find it swarmed with Savathûn's forces. Eris calls on the Guardians to take back the tree, and when they succeed, she uses the Seed of Silver Wings to receive and interpret the Pyramid's broadcasts. She begins camping at the foot of the tree, though she is regularly driven out by Savathûn's forces, requiring her to enlist the help of Guardians again to clear them out.
In the meantime, Eris made reports to Zavala and reflected on the broadcasts received from the Pyramid, while also learning to cook fried rice with raisins and pineapple, using a hot plate and a makeshift wok salvaged from the Moon. While cooking, she would encounter some problems, mainly not knowing what a pineapple is, nor where to get any. A Guardian named Enina later found Eris, seeking to help her with her investigations, to which Eris responded by snapping at her to bring her a pineapple. Enina returned a few weeks later, telling Eris of an arcology garden on Titan known to contain pineapple seeds. Elated, Eris sent Enina to retrieve the pineapple seeds, which she would plant in a plot of special loam, as Io's own soil does not support agriculture. At one point, Eris also spotted a Ghost among her supplies that seemed to be spying on her for unknown reasons.
Weeks into her investigation, Eris discovered that the Tree of Silver Wings had grown a branch with leaves that resembled tiny feathers. Interpreting it as a gift from the Pyramid, she invited Zavala and the Guardian to see it. The Guardian removed the branch, and, with Eris' help, grew the branch into a weapon, the Ruinous Effigy.
Eris has also enlisted the Drifter to research and investigate the Darkness, but she doesn't trust the rogue Lightbearer and monitors him. When she discovered he was recruiting the Guardian to enter the realms of the Nine for information on the Darkness, she angrily contacted him and declared he was mistaken if he thought she would allow such a thing without being involved.
Journey to Europa
At an unknown point, proper contact was made between Eris Morn and the Exo Stranger. Eris had previously been spied upon by the Exo Stranger through her companion, during her time on Io. Setting out with the Exo Stranger and Drifter, she traveled to Europa to discover the Pyramid located there, and also began harnessing the power of Stasis under the guidance of the Exo Stranger. However, the secret of the dark future awaiting Eris was kept from her. It is hoped by the Exo Stranger that Eris can avoid the temptations of power, straying from her fate of destroying all life as a herald of darkness.
Though Eris continues to find The Drifter to be obnoxious and insufferable, and found the Exo Stranger very reserved, she nonetheless admitted they are better company than her solitary studies on Luna. She was pleased to see the Guardian again, she warned them that the power of Stasis is not a gift from a benevolent overseer but a tool stolen from an enemy and that only a balance mind can aid them in mastering it, as she admits that without the Exo Stranger's guidance when she remained entangled in the Darkness. Eris would also inform the Guardian about sending a message to Zavala and Ikora regarding their cause though understands that they are wary. Yet, Eris states that even they can convince them of the necessity of wielding Stasis to survive what is to come.
As the Guardian made progress in wielding Stasis and battling against Eramis and her House of Salvation, Eris would comment that while they are far from true mastery, their progress marks a step forward for their cause. She hopes that by the Guardian's example, others would be encouraged to follow as the Vanguard remains wary of the trio but as they trust the Guardian, they can convince them that the Darkness can be tool used for good just as the Light has been used for evil.
In the time since the discovery of the Europan Pyramid, Eris has continued her investigations into the Darkness, the Pyramids and their powers. It was around this time, Mars had mysteriously reappeared, albeit experiencing a form of temporal distortion. Ikora gathered her Hidden on Mars to begin an investigation of the planet's condition, requesting Eris Morn to join the effort. It was near the Martian Cradle, the Hidden discovered a structure called the Enclave and the Relic within, which Eris Morn confirmed that both were related to the Pyramids. However, the investigation would take a new turn when Savathûn revealed herself upon her ship, The Lure.
The Guardian was then called in to investigate the Witch Queen's return and upon getting inside her ship and infiltrating her Throne World, they would make a horrifying discovery: The Lucent Brood and it's Lightbearing Hive. The Guardian would work with Ikora in discovering how Savathûn stole the Light, with Eris providing aid in their efforts of traversing Savathûn's Throne World, specifically teaching them to hone their Deepsight abilities. During this time, Eris would continually argue the need to use Darkness-related abilities with Commander Zavala, who remains very reluctant to do so, believing it might corrupt the Guardians. Ultimately, the Guardian would discover a more shocking revelation: in looking into the Witch Queen's memories through the Altar of Reflection, learning of an entity called The Witness who supposedly commands the Black Fleet and learn of her plan to seal the Traveler away within her Throne World, they learn that after escaping the Reef following the excising of her worm, Savathûn had journeyed to Earth and came before the Traveler as a "supplicant" before ultimately dying. It was there the Traveler allowed the Ghost, Immaru, revive Savathûn as a Lightbearer, thereby proving that the Witch Queen never stole the Light but was blessed with it.
Taking this awful truth to the Vanguard, Zavala would be left completely incredulous that the Traveler would give Savathûn, one of humanity's most devious foes, the Light. Eris would point out the Traveler's behavior of uplifting civilizations then suddenly abandoning them, as told within the Books of Sorrow, though Zavala would attempt to denounce this as Hive propaganda, but Eris would counter that the Eliksni themselves speak of a similar tale. Remarking that while the Traveler made the Eliksni world a paradise, once the Darkness arrived, the Traveler left them to the Whirlwind before arriving to the Sol System. At that point, Zavala angrily reminded that once the Darkness arrived in Sol, the Traveler sacrificed itself to save humanity from the Darkness which included the Hive. Yet, Zavala still couldn't comprehend the Traveler's reasons for giving the Hive the Light. Ikora, however, would state that it doesn't matter and that regardless of the Traveler's reasons, if Savathûn succeeds in her plan then the Last City would be defenseless and won't survive the Witness's return.
Resolving to stop the Witch Queen, Ikora had Eris aid her in preparing the Relic to splice into the calcified worm familiar that was found during the Guardian's investigations in the Throne World. There, Ikora learned that the Hive had been tricked from the very beginning. The Witness was aware that the Traveler would soon uplift the Krill and seeking to claim them first, had whispered to Sathona through her worm familiar, speaking of a world-ending event and goading her and her sisters into traversing the Deep, thereby encountering the Worm Gods and forming the Pact that would create the Hive species and rebirth Sathona and her sisters into the Hive Gods.
Armed with this knowledge, the Guardians would interrupt Savathûn's ritual to seal away the Traveler and using the secret of her past, they destabilized the Witch Queen enough to lose focus over the ritual, thereby undoing her spell. After a grueling battle, the Guardian succeeded in defeating Savathûn, though her Ghost managed to escape in the flash of light when the Traveler returned to the Last City.
Return of the Nightmares
As the foremost authority on Darkness and Pyramids within the Vanguard, Eris would take the lead in Operation Midas, combating the situation created by the return of The Leviathan and the Nightmares spawning from it. Upon the Guardian landing on the Leviathan, it is made apparent that Calus is attempting to merge his consciousness with the Pyramid on Luna, weaponizing Nightmares to hold off anyone trying to stop him. To fight this, Eris uses her knowledge of Nightmares, Hive magic, Darkness and more to fabricate a Nightmare Harvester, and utilizing the Crown of Sorrow aboard the H.E.L.M. to intercept information about the current situation. The Harvester is put to use in a séance, binding the Nightmares of Zavala and Crow in an attempt to weaken the connection between Calus and the Pyramid on Luna. After weeks of struggle, she counsels Zavala, Crow and Caiatl on overcoming their Nightmares, relying on her personal experience to guide them. Despite the efforts of Eris and the Vanguard-Cabal coalition in pacifying the Nightmares, Calus arrived on the cusp of completing his plan to merge with the Lunar Pyramid. Eris then orchestrates a grander binding ritual within which the Guardian, Zavala, Crow and Caiatl strike at Calus' psionic form in an attempt to break the transfer of Calus' consciousness from the Leviathan to the Pyramid. In destroying and containing the summoned Nightmares, the Vanguard-Cabal coalition were victorious in stopping Calus' plans.
During Operation Midas, Eris discovers that a statue of Calus within the Tribute Hall is exhibiting an unusual resonance with Darkness energy. As it turns out, this statue is linked to Calus' consciousness. She constructs a device surrounding this, which allows users to invade a dimension representing his consciousness, enabling further understanding of Calus' motivations. Bypassing the Vanguard and the usual protocol as she thinks this requires urgent investigation, she recruits the Guardian via Suraya Hawthorne to look into it. Advising a fireteam on delving into this realm, it is discovered by Eris that Calus himself is torn and haunted by his past, that he believes transformation will give him better insight into the Witness' goals, and that he seeks the "final shape". This prompts Eris that this final shape must be investigated further to be understood, as knowing what it means may help prevent a second Collapse from occurring.
Ultimately, Eris would learn that while they managed to stop Calus from completely merging with the Pyramid, he nonetheless succeeded in his goal of becoming a Disciple of the Witness, thereby making himself the harbinger of a Second Collapse. Though the Leviathan is silent, it would take months to fully clear out the vessel of the Nightmares, which Eris believes would be a wasted effort as they are now aware that the Witness is near.
Personality and traits
Secretive, vengeful, quiet and heavily somber, Eris Morn exemplifies nearly every trait of a hardened and scarred survivor. Though it is largely unknown what type of person Eris was before the mission in the Hellmouth, she was no doubt a loyal teammate to her fellow Guardians. However, following her experiences deep within Crota's domain and the tragic loss of her friends at the hands of the Hive Prince have left Eris bitter, hardened and dark. Since emerging from the Hellmouth, Eris became obsessively determined to achieve vengeance in the name of her fallen friends, striving to take down the Hive as a whole.
Despite still being loyal to the Last City following her traumatic experience, denizens of the Tower are often uncomfortable with her dark moods, with the Speaker and Zavala often finding her foreboding warnings of the Hive to be a sickness. Likewise, Eris does not see the value or point of the Last City's holidays and traditions such as The Dawning and the Festival of the Lost. Ikora, however, continued to show support and faith in Eris, which led to her becoming a member of the Warlock Vanguard's Hidden. Cayde-6, on the other hand, often made comedic jabs at Eris, especially when they worked together during the Taken War, which Eris did not exactly appreciate. Thus, she heavily scorned the Hunter Vanguard. Despite this, Eris did show a measure of sadness after learning of Cayde's death at the hands of Uldren Sov and the Scorn. The only member of the Tower whom she maintained a true friendship was with the Gensym Scribe, Asher Mir, finding kindred spirits in each other due to the changing experiences they have had at the hands of aliens. In regards to the Guardian, Eris showed respect for their efforts in protecting the Last City and gratitude for listening to her warnings. She was especially grateful for their actions in slaying Crota and Oryx, granting her vengeance for the friends she lost. However, she warns the Guardian not to grow accustomed to their victories, for she always (and rightly) believed that a greater threat would be waiting and must be prepared for. Upon working together again in combating the Nightmares, Eris grows grateful in the Guardian's efforts to lay her demons to rest and in finding lost mementos to her former fireteam.
Even though Eris possesses an unending hatred for the Hive who took everything from her, she has become one of the Last City's foremost experts on the Hive, second to or even rivaling Toland, the Shattered, bearing in-depth knowledge on their practices, powers, deities and intentions. The Guardian and Ghost appreciate her knowledge on the Hive, as it saved their lives multiple times and aided them in defeating their enemies. Zavala himself often defers to Eris's expertise on the Hive and Taken whenever possible.
Most uniquely, Eris bears strong connections to powerful and legendary figures in the Solar System, namely Queen Mara Sov and Osiris. For an unknown time, she maintained a level of communication with the exiled warlock. With Mara Sov however, Eris possessed a level of trust and respect with the Reef Queen, having full knowledge of her plans in the Battle of Saturn and what needed to be done to achieve victory against Oryx. Further, she relayed her findings in creating Throne Worlds to Mara and what information she had on Savathûn, the Witch-Queen.
Players must speak to Eris to unlock the Story Missions and Will of Crota strike in The Dark Below, as she is the story agent for the expansion. Besides offering quests, Eris offers her own bounties and has her own reputation stat. She sells unique shaders, emblems, class items, and a few upgrade materials specific to the expansion.
When The Dark Below is obtained, Eris will hand over a quest line called the Rise of Crota. After completing the quest and its missions, Eris will award you with the legendary fusion rifle Murmur. Eris will give you two quest lines, The Extermination and the Urn of Sacrifice. The Extermination will award you with the Mark of the Duskborn, Cloak of the Dusktorn, or "Curse of the Hidden" depending on your class. The Urn of Sacrifice will award you with Knightbone Guard, Acolyte Rung, or Thrallskin Brace depending on your class.
Available items for purchase depends on what level of reputation the player has with her. Unlike many other vendors, she sells upgrade materials and ammo synthesis in exchange for Black Wax Idols.
List of appearances