Kōhei Tose is a supporting character in the anime OPUS.COLORs. He is a childhood friend of Kaede, Mashu, and Yuichi, and the four of them attended the same art class together as children. Kōhei has a bright and cheerful personality, able to laugh off even the most outrageous or dangerous stories. At the same time, he is level‑headed and often acts as the voice of reason, particularly serving as a stopper for the overly innocent Yuichi. He is frequently amused by the strong and eccentric personalities of his childhood friends, but he also admires and respects their ability to forge their own paths. Kaede has a deep affection for him and has long wanted to partner with him, but Kōhei has avoided this because he finds her love overwhelming. He has short maroon hair and pink eyes. As a character, his role is to provide grounded support and balance among the group, and he does not possess any extraordinary abilities beyond his perceptive and sensible nature. His development centers on his growing appreciation for his friends’ individuality while maintaining his own steady outlook.