Hair, Ahoge, Blue, Short, Spiky Bangs
Eyes, Blue
Body, Pale, Slim, Teen
Clothes, Headphones, Jacket, Sports Shoes, T-shirt
Items, Handgun
Personality, Boku, Brave, Donkan, Kind, Stubborn, Timid
Role, Based on a Fictional Character, Childhood Friend, Healer, Magician, Prisoner, Superhuman
Engages in, Blessing, Cleaning, Escape From Confinement, Fighting, Investigation, Planning, Shopping
Subject of, Avoidable Death, Confinement, Kidnapping, Survival, Torture, Wounding
Visual novelsProtagonist - Kangokutou Mary Skelter
Makes an appearance - Kangokutou Mary Skelter 2
Voiced byKhoi Dao (English (Uncredited))
Sakai Koudai (Japanese)


The protagonist. A boy who spends his days as an inmate in Jail. He’s a little timid, but also has a strong side. He is a kind-hearted soul who occasionally tries to protect his friends by throwing his own life on the line.

He’s taken by Akazukin, who came to save Alice, to break out of jail. As support for the Chishiki Girls Squad, girls who fight while wounded and wish to become women of power, they attempt to escape Jail.

Although, he’ll later also obtain a blood-type (Chishiki) ability and be discovered a “Chishiki Boy”…

Other instances

Nightmare Jack
Nightmare Jackナイトメア・ジャック 
Eyes, Blue, One-eyed
Body, Overweight, Pale, Ugly
Clothes, Band-aid
Items, Handgun
Personality, Boku, Coward, Kind, Stutter
Role, Healer, Monster
Engages in, Blessing, Self-sacrifice, Shapeshifting
Subject of, Amnesia, Injury, Survival
Visual novelsMain character - Kangokutou Mary Skelter 2
Voiced bySakai Koudai


After sacrificing himself in order to save Little Mermaid and almost dying, Jack's body got covered in vines, which transformed him into his current state. Despite his current appearance and his intelligence dropping down an infant's level, he still retains his kindness, which helps him support the Chishiki Girls during battles.