Finn put the memory of the petal falling off the flower into the vault. Finn was talking to the flower, the petal fell off, then he said "I'm going to forget you did that. Right in the vault." He didn't put the memory of whatever it was he did with LSP into the vault, just the petal. I thought it was funny.

I don't know. I'm fairly sure if Finn wanted to stop LSP he could have. Even depressed, he's a pretty capable guy. But the point is that he was depressed and had reached a point where he didn't care. Yes, LSP was forceful, but Finn let her be. And if you switch the genders you get Fiona, right? Fiona also seems like…