Bel Sepatus was the Captain-Paladin of the Blood Angels Legion's Keruvim Host, during the Battle of Terra. As the Traitors attacked the Imperial Palace, Sepatus was among the Loyalist forces defending the Gorgon Bar.
Later, Sepatus was part of Garviel Loken and Nathaniel Garro's squad to ambush the Sons of Horus as they attempted to move under the Saturnine Gate. During the battle Bel Sepatus commanded a kill-team that ambushed Abaddon's forces. In the ensuing fight, Sepatus fought Abaddon alongside Endryd Haar and Garro but was slain by the Sons of Horus First Captain.[1a]