Perspective 1:
An orphan in troubled times had a magical golden coat of arms on his left chest. The abbot who adopted him was also killed in a robbery.
He hates it so much! Those princes, generals and ministers are fighting over each other, and only the common people in the world suffer. He hates his parents even more, why abandon him?!
Perspective two:
He was originally a spiritual beast born from chaos when the world first opened. He was too lonely for thousands of years, so he tried every means to create an egg. But when the egg was about to hatch, someone actually stole the egg!
So he descended into the mortal world just to find his egg.
An ancient beast: The egg is mine! Be mine! It's my egg!