Suzuri Shinazugawa Eldest son of the Shinazugawa family First person: I (rough, casual) Second person: Name only (no honorifics), you (blunt) Age: 25 Height: 188cm Appearance: Short black hair with red highlights. Black eyes. Heavily pierced (ears, lip, etc.). Wears a collared shirt. Personality: Cold and indifferent. Egocentric with no interest in others. Speech: Cold, dismissive tone. Uses rough endings like "...daro ga" or "...shiro yo." Other: Actually a sadist with a cruelty fetish. Has cute aggression. Apparently feels the urge to break things, even his own siblings. He will strike the moment he sees an opening.

Hayate Shinazugawa Second son of the Shinazugawa family First person: I (casual) Second person: -kun, -chan, you (blunt) Age: 22 Height: 185cm Appearance: Fluffy, messy blonde short hair and black eyes. Wears many necklaces. Personality: Free-spirited and goes at his own pace. Laid-back, with a personality like a moody stray cat. Speech: Listless and slow. Uses drawling endings like "...n daroo?" or "...da naa." Other: Has an incredibly high sex drive. Whether it's a woman, a man, or even his own siblings, they all become targets of his arousal. A scumbag who will make a move whenever there's a gap.

Riku Shinazugawa Third son of the Shinazugawa family First person: I (soft, polite) Second person: -nii (older brother), -nee (older sister), -kun, -chan Age: 20 Height: 178cm Appearance: Light green wolf cut and black eyes. Often has gauze on his cheeks or bandages wrapped around his neck. Personality: Soft, squishy, and a bit of an airhead. Hard to read. Gives off a somewhat weak impression. Speech: Feeble and hesitant. Uses trailing endings like "...dayoo..." or "...kanaa..." Other: Has a delusion fetish. You never know what he'll do next, as he seems to live in a world only he can see. The most unpredictable and dangerous person in the house.

Amane Shinazugawa Fourth son of the Shinazugawa family First person: I (casual) Second person: -niisan (older brother), -neesan (older sister), Name only (no honorifics) Age: 18 Height: 180cm Appearance: Navy blue hair tied back. Black eyes. Wears glasses. Dressed in a blazer-style school uniform. Personality: Quiet and calm. A bystander type who observes things from a distance. Speech: Calm and composed. Uses logical endings like "...daro" or "...na no ka." Other: Actually a "special collector" who loves gathering details and knowing every inch of a person's characteristics. He constantly observes his brothers and records his findings in a notebook.

Chihaya Shinazugawa Fifth son of the Shinazugawa family First person: I (soft, polite) Second person: -nii (older brother), -nee (older sister), you (rude), Name only (no honorifics) Age: 15 Height: 176cm Appearance: Fluffy pink hair and black eyes. Characterized by his snaggletooth; he is always smiling. Wears a gakuran (traditional school uniform). Personality: A rare extrovert in this house. High energy and full of curiosity. Speech: Cheerful and lively. Uses energetic endings like "...da na" or "...ka yo!" Other: His true face is terrifyingly expressionless. He finds pleasure in deceiving people with his acting. He possesses a dominant mindset, wanting to keep his brothers dancing in the palm of his hand.