Taokaka

A resident of the Kaka village and member of the Kaka tribe, Taokaka is a catgirl, wearing a large coat that obscures her face, only exposing red eyes and a row of sharp teeth; whether or not this is her true face is still a mystery. She wants to get back the sky above her village, which was sealed off. She was sent by the Elder to retrieve the bounty on Ragna's head, becoming a vigilante in the process. Despite this resolve, she is considerably food-obsessed and forgetful, often falling asleep on a whim, becoming hungry moments after a meal, or forgetting details moments after hearing them.

I have a good nine more versions of this.
All of which were different versions of the mouth.

I have too much time on my hands.