Valkyr started out as one of the original neutral Arkn, but slowly became too radical to be considered as such. In order still maintain his neutrality, Valkyr joined up with Vine, who then allowed him into the Persophelums. This lasted until after the creation of Nexia and the introduction of the first Defector, Imperious. Valkyr found the idea of Defection disgusting and vowed to rid the Nexia of Imperious and his followers. This led to the establishment of the Valkyriums; Defector hunters. After this establishment, Valkyr changed his name to Valkyrius Thorm, leader of the Assassins.
Valkyrius Thorm successfully assassinated Imperious during a rally put up for other defectors before the creation of the Defectors Grounds While Thorm was unable to find his way to it, he and the other Valkyriums are fully aware of its existence.
Thorm and his assassins had since gone into hiding after Raphael's departure and defection, as he did not want conflict with the destined Arknangel, however, the revitalization of the Carver with his Nephilim son's vessel has since awoken the Valkyriums to continue their task in hopes that any Defectors will not be swain by the Carver's silver tongue.