Bukaro
he should stop by konosuba it has a dumb goddess but with resurrection powers and the adventurers level system could allow him to have very unique skills like stealing kazuma outside that the reason could be the demon king that has out there that it would be interesting to see her interaction with darkness she would probably become a training companion
Have you thought of using Bobobo-bo Bo-bobo. Hajike as a power? You can think of it as Toonforce where even madness is normal. Where there’s no limit to the bizarre or unexpected that can happen with it. Mc powers seems as like an imitation of Hajike. Could use Bububu-bu Bu-bubu (bobo sister) or Denbo (fusion of Bo-bobo and Dengakuman.) as a teacher or something. Would be a major upgrade to all his main abilities and work better than madness.