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As a child she attended elementary school and formed a Panzer IV team with Miho Nishizumi, Emi Nakasuga and Chihiro Yusa. As a high schooler she attended Bellwall Academy and became the co-commander of the unit, alongside Emi.
Hitomi Yuzumoto grew up in Kumamoto City, in the prefecture of Kumamoto. She attended a nearby elementary school, where she would have a fateful encounter with three individuals.
- Chihiro Yusa - Her best friend, childhood friend, and classmate.
- Miho Nishizumi - Her friend and classmate.
- Emi Nakasuka - Her friend and classmate.
- Referred to as Tank Geek by Kanako Kawashiba.