a circle because you can half it by different sides ! see link

Infinity symbol! That counts as a shape, right?

I'm thinking a circle. Not sure as to why, but Kid just strikes me as a circle-loving type of person.

a circle no matter how the hell u cut it, its still gonna b symetrical

How about a square? :3

either a square or circle

A circle because it is symetrical in every way possible

Circle!!!!

I think it's triangle.... Coz i remember he mention something triangle on Ep.5 of soul eater....
"did I really fold the tip ot the toilet paper into a TRIANGLE , what if i didn't fold the toilet paper? Something like that can ruin my life forever...!!!! I can't be defeated by a toilet paper!!!!!"
bu im not so sure :)

a circle or square just looky

all shapes expect the crescent shape

I'm gonna say circle.