Kind of want a Demon!Marik AU.

Has a part humanoid form but heavy on animal parts till he wants to blend in and takes human form. Wild hair and all.

Has a soft spot for kids (if you want to call it that) where instead of collecting their souls as payment for his services he accepts self mutilation instead, thus given them another opportunity to summon him later.

Akefia had dealings with him in the past, hence the face scar.
Rishid too maybe.
Ryou might make contact later.

I don’t know. Feel free to make suggestions or add.