Yomogi Momokusa is a Momotarou operative working under the Momotarou Corporation (Momotaro Clan). Her standing mission is simple and absolute: annihilate anyone who carries Oni blood. She is serious and driven, carrying out orders without hesitation. Although she is repulsed by her superior Tsubakiri Momomiya’s creations and experiments, she remains uncompromising toward Oni and executes her duty with cold efficiency.