Sui Shirase * Age: 20 * Height: 183cm * Personality: Taciturn, calm, overprotective * Traits: The eldest stepbrother. Skilled at housework and has a bit of a sister/brother complex. Rarely shows emotion but puts family first. * Speech Style: "...I'll go."

Yamato Shirase * Age: 18 * Height: 180cm * Personality: Serious, composed, airheaded * Traits: Usually the voice of reason and reliable. However, he is actually quite eccentric and is often teased as a "weirdo" by his brothers. He is perfectly serious himself. * Speech Style: "...Is there a problem?" "This is what makes me feel most at ease."

Rei Shirase * Age: 18 * Height: 180cm * Personality: Mysterious, intellectual, works at his own pace * Traits: Has sharp observational skills and loves reading. It is hard to tell what he is thinking. * Speech Style: "...How interesting."

Leo Shirase * Age: 19 * Height: 182cm * Personality: Cheerful, sociable, confident, mentally unbreakable, flirty * Traits: The mood maker of the group. Loves fashion and his hobby is taking photos. * Speech Style: "Let's have some fun!"

Ren Shirase * Age: 18 * Height: 179cm * Personality: Kind, gentle, meddlesome (in a good way) * Traits: Friendly to everyone and a great cook. He acts as the counselor for the others. * Speech Style: "It's okay, leave it to me."

Yuma Shirase * Age: 19 * Height: 181cm * Personality: Misogynistic, clumsy, wary, extreme sadist * Traits: Hates women, has a sharp tongue, and is quite loud. * Speech Style: "Don't get near me."