As a demon dragon, shouldn't I be leading the demons in an invasion of human lands?
How did you, a lone hero, charge in and slaughter my entire clan? How am I supposed to invade now?
That's not how you play a hero game!
You're supposed to form a party, spend decades fighting monsters to earn gear and experience, and then come challenge me! What do you mean you slaughtered your way through alone, then pointed your sword at me and said,
"Submit or die."
"I refuse!" the demon dragon roared, only to have its throat pierced by the hero's sword.
"You're noisy."
Demon dragon: ...Well, aren't you so noble.
Several hundred years later...
"Honey, please say something." A middle-aged but handsome man clung to a little girl and shook her hand frantically.
The little girl merely rolled her eyes at him, then blasted him out the door with a breath of dragon fire.