Age: maybe 3 or 4? But looks more like 17-19
Height: Fairly tall. I’d guess maybe close to 6’? idk
Weight: probably lighter thank he looks? Nobody physiology might be fairly wonky.
Medical Info: IS AN EMPTY, HEARTLESS SHEEEELLL. But A-OK otherwise!
Eyes: ~~Aquamarine~~
Hair: a dishwater blond mullet/mowhawk atrocity.
Physical traits: Not particularly built, but not a complete beanpole. He's probably always going to be wearing the standard Org XIII black leather trench coat (his has stylish pointy shoulder pads :Db)
What's Okay To Mention Around Him/Her: I’d prefer you not break the 4th wall at him too hard, but feel free to lean on it. He probably just won’t get it. He's taken from after his death in KHII, so spoilers are fine. He probably won't want to talk about his own demise at length, though.
Abilities: Summoning water clones, blasting with water jets or just clonking people over the head with an over-sized sitar. Also, summoning dark portals for a hasty exit. He'll try to avoid fighting altogether in most circumstances.
Notes for the Psychics: Probably just seems kind of wrong and out of place to those that can sense that sort of thing. His cheerful persona isn't entirely fake. He mostly means it, as much as he can, but there isn't really genuine feeling behind it.
Can I shapeshift/bodyswap/spit at/step on/etc?: Yeah, sure! Demyx is made for mild abuse.
Maim/Murder/Death: No thanks, except under special circumstances, maybe. Comic violence is fully approved, though.
Cooking: Umm. No.