Matabei
Muneakira's first Master Samurai, marked by a contract seal on her chest. In her transformed state, she reaches a power level of five million and shows a notably sadistic streak—though she's fundamentally honorable and respects those who've proven themselves worthy in combat.
Her normal personality is a complete contrast. She has no recollection of her life as a Master Samurai and is heavily fixated on Muneakira, constantly calling him "onii-chan." She comes across as airheaded and childlike, referring to herself in the third person, which only adds to her innocent demeanor. The shift between her two modes is pretty stark.
She fights with a daisho set, featuring a distinctively colored katana that stands out from the typical design.
Content compiled by AnimeList.moe from publicly available sources.