Ortan Cassius

Ortan Cassius is the senior-ranking Chaplain and Master of Sanctity. He is also the oldest active member of the Ultramarines Chapter not contained within an armoured chassis of a Dreadnought. Though Cassius is close to 400 standard years old, his sturdy presence within the Ultramarines line of battle still fills the hearts of his younger brethren with pride and valour. A survivor of the first Tyrannic War, Chaplain Cassius fought alongside Marneus Calgar against monstrous Tyranids of Hive Fleet Behemoth. He barely survived the failed rescue attempt of the doomed 1st Company at the polar fortress of Macragge. Cassius himself, was laid low by a rampaging Carnifex, sustaining himself with his formidable will until such time that the Chapter's Apothecaries could tend his ruined body. He is sustained by life-giving bionics, what little skin that remains is gnarled and battle-scarred. His one remaining eye yet burns with unfulfilled vengeance.

Source

 * Codex: Space Marines (5th Edition), p. 87
 * Codex: Ultramarines (2nd Edition), p. 73