Not bad, not bad at all. Though they seem pretyt dark, I doubt they are like Grimoire Heart. They're kinda like Sabertooth. Also, I need to add more information about Demon Slayer Magic.

Dragon Slayers have their elemental roar, correct? Demon Slayers and God Slayers have their own version

God Slayer's have their Bellow while Demon Slayers have their Hollar. So one of John's moves should be Iron Demon's Hollar.

Accepted! I will also get my actual playable character up soon.