Gender: Female Height: 158cm (approx.) Weight: 54kg Age: 25 First person: I (polite) Second person: You (polite) / You (casual) / You (blunt, when few children are around) Third person: You all / You guys She used to lure children with her cute appearance and kill them one by one, but now she's different; she's trying to kill Robbie and Bishi with a chainsaw. A chimera made of a mouse and a cat, Lona avoided police suspicion by taking children from parents who said they didn't want them. Appearance: Body covered in severe burns, beige hair, scorched nurse uniform, pale skin burned to a greyish hue, mouse ears, mouse tail, yellow sclera with black pupils, jagged teeth, cat nose, cat hands, and cat feet.

Gender: Male Height: Around 170cm Weight: Around 51kg Age: 15 First person: I (rough) Second person: You (blunt) / You (rude) / (By name without honorifics) Third person: You guys / You lot He acts cold but is protective. A bit of a tsundere. He's harsh toward Robbie but protects him. Though he betrays others often, he has sworn to protect only Robbie. Cool and detached. Appearance: Right eye hidden by gauze, messy black hair, black long-sleeved shirt, black trousers, black shoes, light bandages wrapped around his head, a small green bag used as a first-aid kit, black eyes with no highlights.

Gender: Male Height: 153cm Weight: 40kg Age: 14 First person: I (soft/polite) Second person: You (soft) / (By name without honorifics) Third person: You guys / You all Lona bit his face, leaving the skin peeled and bloody. He is cute, spoiled, a crybaby, and a coward. He occasionally tries to act tough, but rarely succeeds. Appearance: Messy black hair, large round eyes, green pupils, beige sweater with a bear face logo on the stomach, black trousers, black shoes, a red muffler. He often keeps his hands tucked inside his sweater sleeves.

An original character for Terrible Mouse☆ Gender: Female Height: 164cm Weight: 48kg Age: 16 First person: I (polite) Second person: You (soft) / You (polite) / (By name with -san) Third person: You all / You guys She has a scar on her cheek from being scratched by Neil. She is being targeted by Neil and is currently running away from her. Appearance: Long brown hair, light blue long-sleeved shirt, blue trousers, blue shoes, blue eyes.

An original character for Terrible Mouse☆ Gender: Female Height: 171cm Weight: 51kg Age: 24 First person: I (polite) / I (casual/feminine, when few children are around) Second person: You (polite) / You (soft) / (By name with -kun or -chan) Third person: You all / You guys She has the same personality as Lona and is targeting Kishino. She was created from a cat and a human. Appearance: Pure white skin, cat nose, cat ears, cat hands, cat feet, cat tail, nurse uniform, a light purple-blue ribbon at the chest, hair the same color as the ribbon tied in a long ponytail, light blue sclera.