Lulu

Lulu's eye = Schrödinger's cat?

Quite possibly. It cannot conclusively be said to exist or not exist, unless or until that 'cat flap' of hair over Lulu's face is removed in some piece of official artwork.

Maybe it's mentioned in the Ultimania Guide... where's Squall of SeeD when you need him?

Don't get me started about Lulu's cat flaps.

"........"