Michiru Kinoshita

Michiru

Seiji Nakamitsu

Yumiya

Yuuri Sunohara

Sango, Yumiya's younger sister

Hiromi Saotome

Hydra's companion

Rio Serizawa

Son in-law's wife

Kan'ichi Hiraga

Sakota, legal advisor

Junk Saito

Hydra, Satake's friend from college