[Muffet doesn't need to facepalm, because Ignis is quite willing to do it himself. Or, at least, something close to it. He takes off his sunglasses so he can run a hand over his face and then through his hair, before replacing them and letting out a small, self-conscious chuckle.]

I really thought everyone who mentioned it was just in on a joke I didn't know about. I must have sounded like such a fool.

[He sighs, letting himself feel embarrassed just long enough for Muffet to make her apology, an apology that makes him shake his head.]

You have nothing to be sorry for. It doesn't matter what form you take. You have a kind and loving heart. That's the important thing, and honestly, what you just said makes so much sense with what you told me about how your magic works. I should have realized before I had this mental image set in my brain that is nothing like what you actually look like.