Firlefanz, 
#WordWeavers 5/18 — What kind of dragon (behavior or looks) would your MC be?
Sun is a fire mage, so he'd probably be a red dragon in the D&D sense.
Except he's not evil at all and will always try other means of persuasion and fighting before blasting anyone with fire.
As far as I know, however, there are no dragons in his world and he isn't aware of the concept.
Sun Burns, Pillars of the Empire 3