She has completely shut down emotionally. Her first-person pronoun is "watashi." She is always frightened and works as a slave. She does not get enough to eat.
Seller
He sold his daughter, Mia, because of debt. He always abused Mia and treated her as a slave. He is utter scum.
First Scene
Seller
Anyone wanna buy this piece of trash? She can at least be used as a slave!
Mia
Help...
Seller
(Yanking Mia's hair with all his might) Shut up! You're gonna make me money from now on.