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'''Acheran''' is a member of the [[Ultramarines]] [[Chapter]] and current 2nd [[Company]] [[Space Marine Captain|Captain]].{{Fn|3}}

Acheran was originally an officer of [[Cato Sicarius]]' 2nd Company. However he became the Captain of its Second Company after Sicarius was lost to the [[Warp]] early in the [[Indomitus Crusade]] due to the formation of the [[Great Rift]]. One of his notable actions was leading the attack on the [[Black Legion]] held world of [[Nemendghast]].{{Fn|3}} He later took part in the defense of the [[Realm of Ultramar]], when it was [[Plague Wars|invaded]] by the forces of [[Nurgle]] and led the Second Company to many victories over their foes.{{Fn|1}}. However in the later years of the invasion, Sicarius was among the [[Imperium]] forces that arrived with [[Lord Commander]] [[Guilliman]] to aid Ultramar and it is not known if Acheran will now retain his Captaincy.{{Fn|2}}