Arkio was the biological brother of Rafen, two Space Marines who served within the Blood Angels Space Marine Chapter. They were a rarity, for it was most uncommon to have two siblings from a single generation found suitable for Astartes recruitment to a single Chapter. Due to their continued sibling rivalry, Arkio attempted to strike out on his own and forge his own destiny within the Chapter's annals. He eventually took a posting aboard the Battle Barge Bellus. To great fanfare and good omens among the Chapter faithful, Bellus had been sent on its way a decade earlier by Lord Commander Dante himself, the Chapter Master of the Blood Angels. Crewed with a hand‐picked force of warriors on an assignment to recover an artefact of the Chapter that dated back to the Horus Heresy, the Bellus' que