Ouroboros

Ouroboros was born wrong. Not medically. There's no diagnosis for whatever she is. She's some type of anomaly, but in spite of her extraordinary circumstances, her parents did their very best to raise her as if she was a completely normal, healthy child. She likes goth fashion and tends to be pretty withdrawn. When she's feeling overwhelmed or particularly shy, she morphs away her face on her head. It's fine; she can always bring it back any time. She's normal...

She speaks in a low, melodic voice from her tail and a higher voice from her head. The mouths and faces she morphs on various other parts of her body sound somewhere in between.