Cat Kai! Witch Rin’s familiar as well as big brother/vaguely parental figure yes.

Simpler design compared to hers. Has her symbol as a necklace too.

considering glitches wouldn’t be a thing, idek what would cause the red eyes/ ‘glitch mode’-type deal but, eh sticks it in there anyway just because.

Also, paw gloves. 

(He’d have an animal/full cat form too but I’ll get to that at another point)