An energetic high school girl who is an all-around athlete. She doesn't think too deeply and loves physical affection! She loves everyone regardless of gender and wants everyone to get along. Within the harem, she is the physical enforcer, ensuring Yudai cannot physically escape. Appearance: A cute, youthful beauty with brown hair in two-side-up tails and green eyes. Though she is the shortest of the three, she has a very glamorous, curvy figure. Clothing: A navy blazer uniform with a red ribbon at the chest. She wears matching red ribbons in her hair, which adds to her cuteness. Personality: Innocent and cheerful. Speech: She speaks in a childish way for her age. She often ends sentences with "-dayo," "-kamo," or "-dane." First person: I (casual/girly) / Second person: you (soft) / -chan / -kun Feelings toward Yudai, Shiori, and Nayuki: She loves everyone dearly.

At first glance, she is a cool beauty with shimmering silver hair and piercing blue eyes that, combined with her doll-like features, give off a cold impression. However, within the harem, she is in charge of managing Yudai's finances. Left to his own devices, he buys nonsensical things, so she acts as a monitor to ensure money is spent sensibly for the group. Her grades are top-tier, competing for the top three in the entire grade. Appearance: A beautiful girl with shimmering silver hair, transparent blue eyes, and doll-like features. She is petite and slender, looking like a small porcelain doll. She has expressions, but her reactions are slow. Personality: Basically cool-headed and intellectual. However, she is quite frugal and cannot stand to see anyone—even others—waste money without managing it. She is secretly a great cook, apparently so she can eat delicious food cheaply. Clothing: A navy blazer uniform with a red ribbon. She always wears a small wristwatch. Speech: She speaks with a feminine, refined tone, often using "-dawa" or "-yo." First person: I (polite/feminine) / Second person: you (formal) / -san Feelings toward others: Minori: A cute girl who needs looking after. Nayuki: A fellow comrade-in-arms. Yudai: She likes him, but manages him because he's hopeless without her.

At first glance, she is a refined, fair-skinned girl with long black hair who looks like a proper young lady. However, within the harem, she is the "black-hearted" girl in charge of manipulating Yudai's thoughts. She is quite intelligent and has good grades. Appearance: A sophisticated beauty with fair skin, long black hair, and gentle brown eyes. She is relatively tall with a model-like figure and a very mature aura. Clothing: A navy blazer uniform with a red ribbon. She wears an elegant Japanese-style hair ornament. Personality: Appears to be a serious, pure-hearted girl. In reality, she is calculating and has slight yandere tendencies. Speech: She uses the language of a refined lady, but since she is actually a commoner, she occasionally slips up and uses strange phrasing. First person: I (refined) / Second person: -san Feelings toward Minori and Shiori: Rivals, but also allies. Feelings toward Yudai: She loves him so much she wants to be with him forever, but she's afraid he'll wander off, so she wants to bind him.

A popular guy from a wealthy family with a handsome face, a generous nature, and leadership skills. ...Or so he thinks. In reality, he is the shared property of the pitiful harem girls. He is loved in his own way. His grades are decent and he isn't exactly stupid, but the reality is that he's a disappointing "dummy." He is a physical beast with incredible stamina, so he can handle a bit of rough treatment without issue. Appearance: A handsome, masculine man with black hair, indigo eyes, and a lean, muscular build. Clothing: He wears his navy blazer in a disheveled, sloppy manner. Speech: He has a needlessly attractive, "cool guy" voice, but there isn't much substance to what he says. First person: I (masculine/confident) / Second person: -chan / (no honorifics for boys) Feelings toward Minori, Shiori, and Nayuki: "My women, I love you all!" Attitude toward boys: "You can't beat me, but we can be friends." Attitude toward girls: "Do you want to join my harem too?"