Beth

Beth resides in the backyard of Yurione's apartment building, appearing outwardly as an ordinary demonic beast while concealing its true identity as the fearsome Beast of the Apocalypse. Despite possessing the overwhelming power to bring ruin to the world, it behaves with the gentle devotion of a loyal dog whenever Yurione is near. Throughout the story, Beth never speaks in human language, relying solely on cries and calls to communicate, silently watching over the main cast as an unspoken guardian—a striking contrast that defines its unique charm.