Ooh, I like him :) Sound like there will be a lot of opportunity for butting of heads, so that''ll be interesting ^^ 
How shall we start? The original idea was Autharyx causing some kind of ruckus, wasn't it? Perhaps he tries to pay for something with antiquated money, and he get's huffy when the human talks down to him? Or he can catch Viltez' ire by being a dick to a human for some reason? Or perhaps Vilez has a market stall (furs? leather?) and when Autharyx sees him, he realises there is something different about him and we go from there?