their insides look like a mix of their outsides and their personality.

Good lord… imagine getting a little cut on your finger, and you look at the cut, and you see a face staring out from inside saying “HI THERE I SECRETLY HATE YOUUUUU” while a set of toes and genitals try to seep out of the cut before you bandage it up forever. That’s some cthulhu-level stuff, man.