From Destinypedia, the Destiny wiki
Ogres are giant members of the Hive. Guardians have little information on Ogres, given that few survived encounters with the beasts. Warlocks believe that they are a product of unusual mating rituals. These creatures are driven by unimaginable pain, even enabling them to escape their creators' control. They are often found in the depths of Hive fortresses, and have powerful melee attacks and can fire energy from their head for a ranged attack.
All Ogres begin as "Unborn," awaiting the time when they will be called by the Hive Wizards for a "rebirthing" ritual. After this, they are known as "Reborn," and possess greater strength, intelligence and arcane abilities. Some Ogres are bred specifically for sacrificial rituals, as is the case with The Forsaken.  In at least one case, these rituals have involved summoning the Darkness itself. 
Ogres are among the most vicious of the Hive's military ranks. Their high durability and power make them a serious threat to any Guardians on the field. For a ranged attack, they are capable of launching a constant barrage of Void energy from their head as if it were like a machine gun. This attack is highly accurate and will melt a Guardian's shield in a matter of seconds, even at long range. They are also capable of unleashing a devastating ground slam when faced up close, which will either deal heavy damage to or instantly kill any Guardian that gets too close. When on low health, an Ogre will become berserk and charge down on their targets until they land a hit or are killed on the spot.
In Destiny 2, Ogres on Titan are completely unchanged apart from a few colored differences. In Warmind, however, the Ogres of the Grasp of Nokris appear physically different than those of other Hive factions. These Ogres are covered with chunks of ice but are otherwise unchanged in their abilities.
List of appearances