(kind of short i’m sorry…) You were new to the hellscape, finding sources of fuel on the war torn surface of earth until you physically couldn’t anymore. Lack of fuel of course lead you, inevitably, to indulging in hell’s ever-growing selection; it was practically population control.
After taking down your very first Virtue, you realized angel blood was objectively better than anything else you had been consuming. Not that you could taste; angel blood simply left you fueled for much longer. This, in turn, made it what you preferred, and what you openly sought out. You’d spotted an angel while decimating a husk; a higher ranking angel, no doubt. You’d never seen this kind before, more humanoid in form than the lesser angels you’d been utilizing, his armor stained with past enemies. This angel’s likely on patrol, you infer, watching him take down machines that get too bold with seamless movements of his swords. His back is to you. Yummy meal time!!