Shinpei is the commander of Shinkansen Ultra Evolution Institute East Japan Command Office Ōmiya Branch. Before that, he was one of the six members of Shinkalion Develop Team.
- Isaburo Yatsushiro (superior, missing)
- Chikuma Kiyosu (superior, deceased)
- Hokuto Hayasugi (former schoolmate, comerade)
- Hibiki Mishima (colleague)
- Kintoki Odawara (colleague)
- Subaru Azuma (superior)