Time to drop my personnal opinion.
As far as I have seen, Hypatia is a great character. But, as John said. Hypatia respects my HoS.
Yes, she is aggressive. And.. That isn't bad per say. It'd be bad if he would punch/kick every prisoner, or, disobey every order. But from my experience she can follow orders. And when she was promoted Interim HoS I was surprised. In a good way. She acted like a HoS should.
That said. I don't think a ban is appropriate. But, that's my personal opinion.