+1 @imphy. And you could add some shine to the eyes with a simple white pixel. Overall, the sprite looks a bit dark, specially the hair and purple suit.
Hmm, the lack of aa makes it look a bit messy. It kinda works in something like xde (although it, too, could use aa), but with sprites this small, every detail and pixel really counts.
Thanks, I will try to tweak some things.