Trucido Severus was an Alarian warrior and warlord from the Alarian homeworld, Doma'orbi. A former Exeralti, Trucido was well-versed in multiple forms of combat, and was easily one of the best that the Alarian had to offer. The longest serving member of the Exeralti, the elite operatives that answered directly to the Alarian Primarchs, Trucido had been, for 24 years, an agent of the Hierarchy's will, a zealous defender of his people and their area of space, and dubbed by "outsiders" as a noted mercenary when he did venture beyond the Hierarchy's sphere of influence.