Kerori Crocell, alias Kuromu, attends Babyls Demon School as a member of the Abnormal Class. She maintains an ordinary student appearance with a blueish-white bob cut, small black horns, and large round glasses designed to suppress her presence; these were later replaced by pince-nez spectacles in her second year. Her standard uniform is a sailor outfit featuring a red bow, pleated skirt, and over-knee stockings. Her akudol identity, Kuromu, features a violet-to-gold wig with artificial curled horns. This persona wears elaborate costumes such as puffed skirts, corsets, thigh-high stockings, boots, and bat-wing accessories. This distinct look conceals her true appearance while highlighting her status as a top student-age akudol. Her personality shifts dramatically between identities. As Kerori, she starts as soft-spoken, polite, and timid, prioritizing others' feelings to avoid conflict. Low self-esteem, driven by weak magic power and family pressure, fuels her desire for validation, especially from her mother. As Kuromu, she exhibits boldness, outspokenness, and occasional diva-like behavior, demanding attention and expressing frustration when overshadowed. By her second year, her timidity lessens, aligning more with her family's confident demeanor. Her background involves a childhood overshadowed by family expectations due to inadequate magical abilities. Discovering street demons treated her kindly because of her cuteness led her to realize physical appeal could compensate for magical weakness. This motivated her to pursue akudol stardom as Kuromu to gain recognition and prove her worth. Key developments include Harvest Festival training under Mr. Hat, where she learned to command magical beasts. She shifted from cuteness-based charm to "Queen Mode," using regal beauty to inspire loyalty instead of fear, dominating her festival block through alliances. During the Music Festival, she choreographed the class performance, achieving a collective rank promotion. In the Akudol Games arc, she recruited classmates Iruma Suzuki and Lied Shax for cross-dancing performances, leveraging her trust in them and revealing her secret identity to Lied. Her abilities encompass the Crocell family's bloodline magic, Ice Façade, enabling ice and cold wind manipulation for offense or defense. Emotional triggers initially caused overheating side effects, though she gained improved control over time, creating large-scale ice defenses. Her natural charm pacifies malice and commands attention, possessing an eros level of 51% even when suppressed. Post-training, Queen Mode allows her to enthrall creatures and demons nonverbally, though it proved ineffective against high-ranking demons like Kalego. She summons familiars like the Blizzard Wolf and Snow Fox King. Her romantic interests include attractions to both Iruma Suzuki and the akudol Gyari, with jealousy arising when Gyari suggested polygamy.