[Okay. Well. Okay, yeah. That description was, what, an old timey cartoon image of a demon, right? Not that Rin believed in any of his world's mythos until he found himself in the very center of it. It would be hard for anyone else to believe, especially if he's never seen one before.]

Dude. Red skin? Seriously? [Seriously?! Who is he, Hell Boy? Wait. No. Don't answer that.] No way! It's more like loads of stuff from horror movies and shit. [He is SOOOOOOO not good at describing his own kind. Rin has to laugh at his own terrible explanation. He studied this stuff, he could come up with a much better explanation than that! Aw, whatever, the point got across.] I mean, some of 'em aren't that scary! You don't have to worry 'bout me, for starters.

But if you keep in mind the other two things you said, and add in tail, then you got me. ...And blue fire. That too.