And then Chara does things like this, regularly. Sees Frisk in pain or even just emotional discomfort, and plainly doesn't like it. They hold out their tail, and the absurdity of the gesture prompts a startled blink from Frisk, as they try to wrap their mind around it. An angel with a devil's tail. What does that make them, one-eighth demon? Purely in the vein of the costumes, of course.

How can insist that there's nothing good about them when they do things like this, even if they're embarrassed and shy and clumsy about it? The intent is there. That's always enough.

"You sound like you know a lot about them," says Frisk, and then they fuss about with the halo until they get it unpinned from their hair, and hold it out in turn. There. Now they can both be mismatched. "And anyway, it doesn't matter, right? We dressed up as what we weren't."

So Frisk is no angel - which they knew - but that also means Chara's no demon! Ha-ha, it goes both ways!