Rei Batsubami, exiled from the Hundred Devouring Families after internal conflicts, endured servitude under relatives who treated her as livestock. Initially presenting as androgynous at Hyakkaou Private Academy with a male uniform, glasses, and gloves, she used male pronouns until the Hundred Votes Auction, where she discarded her disguise. Revealing her true self, she brushed back her hair, removed her gloves to expose crossed-out "Bami" tattooed hands, and adopted a feminine identity. Reintegrated into the clan, she embraced the female uniform, pink lipstick, and a dragonfly brooch gifted by Yumeko Jabami’s sister. Raised as a low-status clan servant, Rei faced neglect until Yumeko’s sister offered kindness, awakening her first positive emotions. Witnessing the sister’s suffering post-civil war, Rei severed her hair and vowed revenge, plotting to dismantle the clan’s hierarchy by manipulating cousins—a plan that ultimately failed. At Hyakkaou, Rei covertly rallied bullied students against abuse while masquerading as the clan’s loyal servant. Though compassionate, her lifelong marginalization made accepting others’ kindness difficult. During the Election arc, she orchestrated the Hundred Votes Auction, rigging bids with votes from those she aided. Yumeko exposed her scheme, prompting a high-stakes coin-toss gamble where Rei wagered her family name. Defeated yet defiant, her resilience caught Kirari Momobami’s admiration, granting Rei freedom to shed her surname and reclaim autonomy. Rei’s journey traced her evolution from vengeful outcast to self-assured individual, overcoming oppression and self-doubt. Her crossed-out tattoos and shifting appearance mirrored internal transformation. Though her new name remains secret, it symbolizes her break from clan control. Her story, exclusive to the anime’s second season, concludes with her hard-won liberation.