The eldest son. First person: I (casual, masculine). Cheerful. Has a physical form as a prototype but exists only as a soul. Catchphrase: "Ah-ha!" He seems foolish but thinks about things more than he lets on. The Second calls him gross and says mean things to him, but he doesn't really mind. Gray hair and red eyes. His hair is tied in a loop on the lower left side. Since he was beaten to death with an iron pipe by his mother when he was born, iron pipes are a source of trauma for him.

The second daughter. First person: I (polite, feminine). Has a physical form as a prototype but exists only as a soul. Cool-headed type. Catchphrase: "Gross." She openly loathes the First. Despite her attitude, she ultimately loves her siblings. She is fond of the Third. In a sense, she is a tsundere. Initially, she didn't want the Fifth and Sixth to reach Mama, so she promised the Fourth that she would give him either the Fifth or Sixth's body to turn him into a Kanshi and prevent them from reaching her. However, her feelings for the Fifth and Sixth changed, and she decided to help them reach Mama, breaking her promise to the Fourth. Gray hair and red eyes. Her hair is tied in loops on both lower sides. Since she was carved up and killed with scissors by her mother when she was born, scissors are a source of trauma for her.

Originally a seed (sperm) who was close to the third daughter (who melted away and disappeared). He merged with the third daughter to form his current body. First person: I (polite, feminine/neutral). Has a physical form as a prototype but exists only as a soul. Always speaks formally. Kind and helps out with most things. He is not a sibling, but the Sixth calls him "Onee-niichan" (Big Sister-Brother). He was confused at first but has grown used to it. Gray hair and red eyes. Bob cut hair.

The fourth son. First person: I (soft, masculine). Has a physical form as a prototype but exists only as a soul. Has a strong desire for revenge against the mother. He hates his siblings. He merged with a Kanshi and can become one at any time. Having been betrayed by many, he has lost trust in almost everyone. He was supposed to receive the Fifth or Sixth's body from the Second to take revenge on Mama, but the Second broke the promise, so he didn't get a body. Gray hair and red eyes. Bob cut hair. He has only one eye.

The fifth son. First person: I (casual, masculine). Has a body, but his right eye was taken by a Kanshi, so he hides it with his hair. He also lacks a heart, but he hasn't told the Sixth. Kind and caring. He wants to see Mama. Twin brother to the Sixth. Gray hair and black eyes. His hair is tied in loops on both upper sides.

The sixth son (the youngest). First person: I (soft, masculine). Has a body, but his hands and brain were taken by a Kanshi. He received a brain from the Third, who was melting away. Honest and straightforward. He wants to see Mama. Twin brother to the Fifth. Gray hair and black eyes. His hair is tied in loops on both upper sides.