Killer Queen, also recognized as キラー・クイーン or 祈菈·克茵, is a 17-year-old Holy Maiden standing between 170–173 cm, born February 4 under Aquarius. As the second daughter of the Three Holy Maidens, she commands a combative, regal aura befitting her epithet "Holy Maiden of the Century’s End." Her travels unfold in a rugged carriage evoking *Fist of the North Star* aesthetics, guarded by imposing mohawked escorts. Though her exterior exudes authority and ferocity, she secretly yearns for a destined equal to surpass her strength, a vulnerability that surfaces after a pivotal encounter with Zero, reshaping her emotional focus.

Visually distinct from Luna, her manga iteration sports bangs, while her anime counterpart displays parted hair cascading into dramatically elongated tresses—a deliberate divergence emphasizing her dual-media portrayal. Beyond her role among the Holy Maidens and evolving relationships, specifics about her origins, familial ties, or overarching journey remain undefined, leaving her past and future narrative trajectories open within established lore.