Tomomi Hōryū enters his first year at Soran High School equipped with a background in junior high volleyball. He now plays as a member of the Soran High School rugby team.

His appearance features brown hair styled in a simple bowl cut, green eyes, and a stout build. He is consistently seen in the Soran High School uniform: plain trousers secured with a leather belt, a blue blazer over a white undershirt, and a red tie.

The teamwork skills honed during his volleyball years prove indispensable on the rugby field, particularly for executing tactical plays devised by teammates. Tomomi respects those possessing deep rugby knowledge and specifically values strategic approaches to the game.

His given name, Tomomi, combines the kanji for "friend, companion, pal" (友) and "un-, not yet, hitherto, still, even now" (未). His surname, Hōryū, incorporates the characters for "treasure, jewel" (宝) and "standing" (立).