Well, see, that's a certain detail even Kurt doesn't know about himself: he technically is half-demon, but he has no idea of this because his biological parents haven't come forward. Besides, his whole appearance easily shouts 'demon,' so Ignacio isn't too far off or wrong in that sense.

Prominent canines peek past the blue of his lips in a grin, the spark in his eyes flaring even more. "Many people haven't. Here, though, I imagine the word is diverse." He pauses, blinking once again then sheepishly dipping his head, attempting to hide the hint of indigo creeping across his cheeks. "Oh, uhm, thank you. My name's Kurt and—" if he's being truthful and bold enough to step out of his comfort zone, "You're rather stunning yourself."

Yes, nailed it. Too bad the embarrassment is obvious because his entire face seems to be turning purple now. It's fine-- he can draw attention away by continuing his earlier conversation. "If you have any supernatural abilities, you're likely a mutant to me."