Despite the name, JACK is actually a woman. Her real name is: Janis Alectos Carotenas Karinato. She works for the CIA and is acting supervisor of Manami. She has a noticeable long blond hair, barely dressed and is often seen eating fast food, appearing to stereotyping American women.

Hanae is a friend of Yūnosuke's who tries to support him when he's down. She later joins the management team, wanting to make something of herself.

The younger twin sister of Roll. Like her sister, she works as an assistant at the Photon Power Lab and also pilots Million Alpha, one of the three robots in the Robot Corps/Mazinger Corps.

Sayaka is the guitarist of the band Death Bang Bang Chicken.

Despite the fact that Sayaka might look "scary" at first sight, she is actually a rather kind person who shows a real love for her band's music, willing to continue to become a professional despite all the losses the band had to accept in the past. She also comforted Ho-kago Tea Time after their embarrassing accident on stage without reservation.

Yukiko Monden

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