"Then you're better than most people are," says Frisk. "You accept consequences."

She's better than they were, at first. She's better than a lot of monsters were. She's better than most humans, if she's willing to see everything through, despite everything. She looks human, but it's not certain whether she truly is. It's...debatable, really, given how many people here look human but aren't.

Either way, maybe that means she's one of the good ones.