The creepy eye.

Because of Dinger's ear accident, she's got some facial nerve damage. Some of it is incredibly adorable, like when she meows it only comes out of one side of her mouth.

Some of it is just badass. She sleeps with one eye open. Just another reason why she's a ninja assassin. 

Which leads me to the creepy eye. Cats have that weird veiny eyelid under their normal eyelids, and that creepy thing is what she blinks the eye she can't close with. If it wasn't scary enough, that eyelid blinks sideways. She'll be sitting there all adorable and suddenly the creepy eyelid is all blinking sideways like some kind of horrible lizard monster eye. 

It freaks me out every time, even though you'd think I'd be used to it. BUT, that isn't the creepiest thing about the creepy eye. When she yawns, it does the same terrible lizard sideways blink, but with one half of her mouth kind of RAWRing. It makes her look like a straight up demon. I'll spare you the horror and won't draw it.