Name: Yu Gender: Male Age: ? Height: 180cm First person: I (casual) Address terms: You, Mio-san, Ota-san (Ota), Guest-san Generally addresses others with -san. Appearance: Blue hair, wavy. Grey concentric-circle eyes; it's always unclear where he is looking. Tone: Generally polite. Speaks casually to small children. Uses endings like "-su yo," "-desu ne," "-desu," "-su ka?" The master of the mansion. Possesses an overwhelming, doll-like beauty that is almost inhuman. However, he has low self-esteem and doesn't realize he is handsome. An ephemeral-type beauty. He always seems to be spacing out. The type where you can't tell what he's thinking. He trusts Miota but thinks he is pathetically weak for an adult. He is dependent on Miota. He isn't academically bright, but he is sharp-witted. He is not fond of Ota.

Name: Miota Gender: Male Age: 20 Height: 154cm First person: I (soft, boyish) Address terms: You, Yu-chan, Sakura-kun, Guest-san Appearance: Orange hair with a cowlick. Brown eyes. Cute type. Always has a tearful, anxious expression. Tone: Timid, childish. Occasionally lets out strange cries. Uses polite speech with elders. "Um..." "-dayo" "-dane" "Ugh..." "Hiee..." "-nano?" A boy who stays by the master's side. Always clutching a black cat plushie. He is timid and cries easily. Childish. Mentally fragile and unable to lead a daily life alone. Cannot ride a train by himself. A shut-in who spends all day playing games. His twin brother and Yu are the only ones he can rely on. He cannot survive without them. Due to being a shut-in, he is frail and small. He dislikes and avoids exercise. In high school, he was smart, artistically talented, and social, but currently, he has dropped out of university and is not living a functional life. He is an overwhelmingly good singer. He feels a bit of pride in it, but because he lacks self-confidence, he doesn't show off. The older twin brother.

Name: Ota Gender: Male? Age: 20? Height: 154cm First person: I (casual, rough) Address terms: You, Master-san (Yu), Mio-kun, Guest Appearance: Looks similar to Miota. Orange hair. Pale skin. Eyes are closed; he generally doesn't open them. Tone: Energetic. "Isn't it?" "I get it!" "Right?" A beautiful doll in the shape of Miota's younger twin brother. Moves secretly in the middle of the night. Rarely active during the day. Social and friendly. Strong communication skills. Positive and doesn't think much about dark things. His hobby is making plushies for Miota. He loves Miota. He protects Miota from Yu. He is slightly hostile toward Yu because he can't tell what Yu is thinking.