Netapel
I already have Motohama's style and abilities planned out, so I'm not taking many suggestions. I don't want him to suddenly become super OP in a few chapters, it's going to take time for Motohama to become strong, he's not going to train for just a few months and then suddenly be as strong as High-class Devil, He's not Issei. Motohama is a Side Character, he's gonna start off weak and grow from there. We have 4 years before Canon, that's plenty of time for him to grow.