started designing one of my game characters this morning, hes the player character for a dating sim, and also a pretty standard portrayal of a western fantasy dragon. Without adding any genetalia, what kind of features do you think i could add to him to make it where you wouldn't question the fact that one of the 3 human female princesses in the game become romantically involved with him?

heres what he looks like so far, but the only real detail i have finalized is that he is the 2 leg "Drake" looking breed and how his ears will look (this render doesn't showcase them very well though)
https://www.weasyl.com/submission/203302