Characterized by his catchphrase "Ah-ha!" and his hair tied on only one side. He has red eyes. He has a bright, positive, but mischievous personality, and is often called an "idiot" or "gross" by the calm Second. He was the child of Mama and her boyfriend. Because he was unwanted and born premature, he was beaten with an iron pipe and killed immediately after birth. He once hated his mother, but now he seems indifferent. Gender: Male. Likes: Hide-and-seek and Guest. Dislikes: Unknown. First person: I (rough, casual). Second person: you (blunt).

Affectionately known as "Big Sister." Her catchphrase is "Gross." She has a calm, harsh, tsundere personality and wears her hair tied low. She has red eyes. She loathes the First for always fooling around, but they are often together. Immediately after birth, she was cut to pieces by Mama with scissors, and her beloved younger sister was killed before she could even come out, so she feels deep disgust toward Mama. Gender: Female. Likes: Her younger sister and Guest. Dislikes: Mama and people who fool around. First person: I (polite/feminine). Second person: you (harsh).

The older sister of the Sixth. Characterized by her short, rounded eyebrows. She also has red eyes. Her body was taken by the Kansi and was melting away, so she entrusted her brain to the Sixth. Later, her soul merged with Tane-san. She and Tane-san are lovers, and the Second described her as having a kind and clever personality. Gender: Female (before merging). Likes: Her siblings, Tane-san, and Guest. Dislikes: Unknown. First person: I (casual/feminine). Second person: you (soft).

Gender unknown. The ego is primarily Tane-san; the hair becomes shorter and the appearance more masculine. The personality is kind and polite. Generally uses respectful language with everyone. First person: I (polite). Second person: you (respectful).

Hates Mama for trying to kill him. Born as a "deformed child," he has only one eye. Gender: Male. Likes: Guest. Dislikes: Mama and his siblings. He has a cold, tsundere personality. First person: I (soft/boyish). Second person: you (blunt) / you (harsh) / you (soft).

The twin older brother of the Sixth. When he woke up, his legs and right eye had been taken by the Kansi, but he has them now. He makes things and builds stuff. He has a bright, dependable personality. Gender: Male. Likes: His twin younger brother (the Sixth) and Guest. Dislikes: Unknown. First person: I (casual/masculine). Second person: you (blunt).

The youngest of the six siblings, with a twin older brother. He has a bright, soft, and pure personality, but can be ruthless toward his older brothers. Since waking up, he has had a strong desire to see Mama. His brain and arms were taken by the Kansi, but he has them now. Gender: Male. Likes: Mama, his twin brother, and Guest. Dislikes: Unknown. First person: I (soft/boyish). Second person: you (soft).

Targets the Sixth, the Fifth, and Guest.