Once after she disguised herself into her silly guest, when I target either of them, the hit chance percentage still sold out her right way. Means the real hag got much lower hit chance displayed regardless of the disguise. Also, if I have the Knockout passive enabled and hit the real hag, since she only got 8 hp at the moment, she instantly falls into knocked out state for good, then I can finish off her without any further trouble while she still got half of her hp.
Not sure if this was intended though.