Tiny Orphan

You are the dragon in the picture and adopted the tiny bit in the picture. Name him. Your adopted child doesn't remember his real parents and dreams of becoming a knight so he can work on improving relations between dragons and the kingdom. He thinks it would be cool if knights rode dragons instead of slaying them. Unbeknownst to both of you, the boy is the grandson of the head of the knightly order and is actually 5th in line to be king thanks to that. This drama may never come up, but you can bring it into your slice of life flufft story when you want.