Avian:
-Canonically depressed as hell
-Conventionally attractive but in a pathetic way (lean and muscular but pale and underfed)
-White guy in a suit
-Low key villainous traits (former asshole rival, would destroy all evidence of briar's crimes for example just because she's the one person in MC he likes)
-Shipping (of canon characters at least) is difficult due to circumstances of canon

It's hard to tell but they're both tumblr sexymen. I doubt Avian would stop the #ReigenSweep but it would be interesting to see.