From Destinypedia, the Destiny wiki
Tibon was among the many Guardians who defended The Last City from an alliance of the Fallen Houses during the Battle of the Twilight Gap. During the fighting, he advised another Guardian to get used to the death the battle resulted in and learn not to fear it but wield it as motivation to continue the fight.
He later joined Holborn's Host, which was assigned by the Vanguard to search Clovis Bray facilities on Mars for information about the Warmind Rasputin. As the unit prepared to move out from their base camp and into the Meridian Bay, he objected to Tubach's dismissal of Holborn's reminiscing of his first resurrection, causing Tubach to claim he might be older than Tibon, at which Tibon acknowledged as "true". They finished organizing their gear and set off for the Dust Palace.
List of appearances