Shion Magaki (真垣詩音, Magaki Shion) was one of the prisoners in the Haguro Prison. Her inmate number was LB0002. She died before fully awakened her "base" which is that of an American criminal and the culprit of the Boston Strangler, Albert DeSalvo. Her murder model was later inherited by Kiriko Makimura.
Shion was a pugilist and karateka. She was nicknamed as the "Killer Demon of the North Sea" for beating three officers to death.
Shion used boxing fighting styles and was a skilled hand-to-hand combatant. She was adept in a close-range combat.