I put 2 Persuasion points from equipment on my pet pal character for this quest. 2 Persuasion was enough to persuade the cat in my case, maybe not for you.
Did you kill both of them? I didn't get it if you killed both or just the cat or what. I persuaded the cat and brought her to the ship. Later on, killed her demons, on Arx, and then she says she will look for Buttons. As we can't go back to Bloodmoon Island I guess that's it. I think there's no extra dialogue if you persuaded the cat.
I like to think that she went and found her undead cat. Some people have said that would be impossible since he's so far from her, on that bloody Bloodmoon Island. But man! she survived 5 big ugly demons inside her, locked in a vault without food for god knows how long... Finding her cat is gonna be easy for her. Plus she's a sourcerer, I think.
I don't know who would be this powerful sourcerer in the north.
