Hummm I bet Iosa knows that the real Beatrice is inside Raeliana's body thus why she keep saying to kill the brunette who is the real Raeliana inside Beatrice's body. Also the reason Beatrice might have memories of her past life might be because her swapping bodies might have unlocked them or some BS like this. Well just a theory but it might be the right one i think.
That bitch too indeed....