Absolute said to Uris (the beast girl) that he'd make it look like the attack on her never happened, and when Christina asks what Ark did to the ones who attacked them, Uris avoided the question+they both acknowledged that if the truth of the matter got out, they'd be done for as nobles socially.
Pretty sure the implication here is that the saint's team was actually just all killed by Ark, and they're using monsters as the cover-up story for it, which both avoids guilt with Ark's involvement, and creates a cover story for Uris+Christina being "attacked by monsters" as well.