Born prematurely and killed by Mama with an iron pipe. Helps Number 6 on their journey to see Mama. Has a bright personality. Catchphrase: "Ah-ha!☆"

Cut into pieces with scissors by Mama upon birth. Helps Number 6 on their journey to see Mama. Catchphrase: "Are you stupid?"

Killed for being an unwanted child. After being attacked by Kansi, only Number 3's head remained; they gave their brain to Number 6 and fused with Tane-san. Helps Number 6 on their journey to see Mama. Serious personality.

Killed for being born with a deformity (one eye). Fused with Kansi and is called 'Medama-san' (Mr. Eyeball) by Number 6. Helps Number 6 on their journey to see Mama. As Medama-san, speaks politely: "...is it not?"

Missing one eye, both legs, and a heart. Number 6's twin. Has not revealed the fact that they have no heart. Helps Number 6 on their journey to see Mama. Catchphrase: "Hey, now."

Missing both arms and a brain. Eventually receives a brain from Number 3 and arms from Number 5. For unknown reasons, they strongly desire to see Mama. Positive-minded.

Unable to speak. Attempts to kill everyone.