The creature shrugs.
"After so long, who knows... Well, I guess this is goodbyes."
She then takes a step back and concentrates, as if she was trying to use some sort of innate magical ability. After some time, she looks confused.
"I can't teleport away... I don't understand, even if my home was destroyed, I should at least be able to teleport away. Oh, it must be that witch's doing! Who knows what sort of experiment she performed on me... this is troubling... Oh well, guess I'll just have to leave this valley the old fashioned way: by walking. IT will be much longer, but it should give me time to figure out why my teleportation failed..."
With this, Ireena chimes in.
"I'm assuming the reason why you cannot leave here is because of the mists. Those who enter Barovia cannot leave, unless that Devil Strahd allows them to..."
She speaks the words "that Devil Strahd" as if she was spitting out poison...
The creature looks shocked.
"What? Why? H-how? Who is this Strahd and how can I convince him to let me go? No, no, no. I did not finally escape captivity only to find myself in a different kind of captivity. No, I will not accept it!"