*Laugh!!!*
Or maybe it's that Kheros is a demon and used to be a magic-weilding prince-fella. Heh. XD
I believe many royal figures tended to be taught defense to an at least sufficient level... considering that they usually had the wealth to attain the teachings.
I don't know Dragyn's tendency toward demonic types well enough to gauge the generic abilities of any one, yet, though.
Wonder what happened to the demon that attacked Kheros/Prince Nighthawk...
Probably died, but it's still a thing to consider.
Also, I wonder how he became a demon, exactly...