Guilty is an A-rank support unit with a high-risk, sacrifice-based design that tries to convert Hatred stacks into teamwide offensive momentum. He is mostly a niche pick for collection or early account experimentation, and he is rarely seen in serious PvP where stable support tools are preferred. His main use is in PvE, in dungeons where we have to deal massive damage.
His key identity comes from Skill 2, which consumes full Hatred and sacrifices one allied Saint to grant a Berserk-style damage boost to teammates for multiple turns, creating explosive but unreliable swing potential that depends heavily on timing and roster setup.
Overall, Guilty can be interesting in off-meta or beginner teams that want a dramatic damage spike mechanic, but limited to PvE.