Martellos is coldly calm in battle, as his thoughts and actions have been tempered by over a century of training within the Chapter's Librarium. He is a force to be reckoned with upon the battlefield, as he is able to twist and turn reality to his desires, and he shows a special gift for the Sanguinary discipline. Martellos also shares a bond with Captain Arenos Karlaen, as the two have fought side by side many times before. As a result he is often seconded to the First Company, where Karlaen values the Epistolary's wise council and the havoc he can wreak in battle.
- 1: Blood Angels Painting Guide – Sons of Sanguinius, pg. 14
- 2: White Dwarf 44 (2014) — The Phodian Mind War