KiruKiruko is a girl who runs a handyman shop in Nakano, Tokyo. She accepts a bodyguard request to take Maru to "Heaven." She is a skilled survivor and an expert with a gun. She used to live in an orphanage in Asakusa.

Prior to the events of the series, Haruki’s brain was implanted into his sister’s body, Kiriko. She has been searching for the doctor who performed the operation, as well as the man who served as her mentor before the accident, Robin. 20 years old. Many masculine traits present.