She's a Faunus which means she has a trait from an animal. So yes, she does have cat ears.
Your reaction is just natural, since I was a little provoking with my appointment. But yeah, like Mystery said: This fact wasn't visible in your first post.
As to the head: If this is the style you want to go for, okay.
But her actual headshape does make her look chubby, what in fact, she is not. It doesn't hurt to play around with your sprite to learn something new.