A dragonborn oc named Balthazar
He used to be a big terrible dragon for hundreds of years before getting tricked by a human who informed him about a one-of-a-kind magical sword. What the human didn't inform him about was that the sword was cursed and seems to have a mind of its own. And thus, Balthazar, The Eternal, is forced into a small humanoid body and made to carry out the terms of his contract with the blade before he can return to his previous form and life.
Is it just a reason to draw a pretty scaled boy with a tail? absolutely.