Haruka Hoshi manages Team Akira, joining after their victory over Team John secured a Battle Robot License. She oversees the tuning and maintenance of the team's battle robots, ensuring tournament readiness. Haruka sports brown hair typically in two braids and wears a distinct outfit: a pink dress, red half-jacket, black or grey leggings, long white socks, and brown shoes.

During one story arc, Haruka temporarily departs Team Akira, changing her hairstyle and hair color. She later returns to the team, resuming her original appearance. Her interactions with team members, particularly Akira Akebono and the robots, involve occasional conflicts or frustration, reflecting her active management of team dynamics and operations.