Tosaka serves as the Camera Club president, radiating enormous school pride and a strong sense of justice alongside an aggressive, unreasonable personality, frequently flipping people the middle finger. His eyes remain constantly hidden behind sunglasses; even without them, his hair obscures his view. He uses a motorcycle for transportation.

Tosaka exhibits a short temper with R, an android student, yet enjoys R's company precisely because R follows orders without question and willingly accepts physical beatings. He shares a complex dynamic with Tawaba, the club's oldest member. Tosaka appears to consider Tawaba his best friend, while Tawaba expresses deep annoyance at R's presence and displays easily agitated, cynical behavior. Tosaka graduates later but continues assisting the Camera Club, with hints he sometimes sleeps in the club room. His interactions involve conflict, such as clashing with Sayoko Amano, a ghost girl involved with the club.

In the "Kyukyoku Sentai Kougaman" segment, Tosaka assumes the role of Kouga Black. His background outside school activities and further character development across media remain undocumented.