In what scenario do you have to protect Butter from Griff? I thought she joined the fight on his side if you provoked him to attack. Does she simply leave combat if she's the last character alive?
If you offer to help her escape and meet her in another town, she will join your side against Griff if you get in a fight with him.
Huh, I didn't know that. I knew you could arrange to meet up with her on the mainland but I don't think I've fought Griff in those playthroughs. That's kind of neat, I was wondering if you'd actually have to spare the entire camp if you wanted to 'save' her.