Greg Mizuno is the brains behind the black knights. As an XO his job is to give infomation to the commander when he needs it, and Greg is a master at that job. Born on Mercury to a govenoner. He joined the Royal Guards as a way to see more than just the places he saw as a pampered boy. His was killed by the negaverse and reborn on Earth in the 20th century. There he had accuried a psychic sence and a rainbow crystal. His skills as a fighter is limited to his duel of duty or ideals to his family. His Daughter (Ariel Mizuno, Sailor Comsic Mercury, Age 16)