The more I think about the more I don't know why Teresa is so OP. Priscilla is OP because of her past and is said that most high ranking warriors have a disturbing past as well, so what happen to Teresa to make her like this? All you get from the manga so far is that she was sold by the people she trusted, which is how most warrior joined the Organization.
I wonder if it's because she got the flesh and blood of someone very powerful in her.