Raises an eyebrow at that horn when it's revealed to him, what a nubby horn it is. Much like a certain nubby horned bro he has back where he really belongs.

"You only have one horn? That's so fuckin' strange, do all humans only have one horn like that?"

As for blood being red, "Are you kiddin' me? Red is the worst color a' blood for anyone to have. The lowest on the hemospectrum -- You humans do have the hemospectrum, right? Unless you don't if only because you're all rustbloods, anyway."