'''Sergeant Learchus''' is an [[Ultramarine]] Sergeant from the 4th Company. He is cool-headed and follows rules very closely, as opposed to his superior [[Captain]] [[Uriel Ventris]]. Learchus is one of [[Captain]] [[Ventris]]'s most trusted sergeant, who often consults him. While [[Ventris]] is in the Eye of Terror, Learchus takes command of the 4th Company. On [[Ventris]]'s return, Learchus grows jealous, feeling that he should command the company. [[Ventris]] reminds him that the Company is his to lead. After this, Learchus shuns any doubt of [[Ventris]]. On [[Pavonis]], Learchus takes control of a Scout squad and infiltrates the port of Praxedes, Distracting the [[Tau]] long enough to allow the rest of the companies [[Drop Pods]] to safetly land. On Calth, Learchus takes control of an armored spearhead consisting of both Ultramarine and PDF vehicles. He then tries to stop an enemy convoy from reaching Gullimans Gate, but is forced to retreat when a [[Baneblade]] appears.

Learchus is armed with a [[Boltgun]] and a [[Power Sword]].

*[[Ultramarines (Novel Series)]] by [[Graham Mcneil]]