Yay, Han finally has a proper ref!
In the universe of Céleste, Han is a half-god - son of the god Son Gokû and his draconic demoness Kikuri. Despite being a monkey god and demon-dragon hybrid, his beast form is half dragon half lion. The reason is that his magic domains are illusion and nature. So, he actually can transform (mutate) his body as he wishes.
Gokû is the king of the Lost Paradise, a wonderful world of abundance and happines. That makes Han the heir of this place.
He's a beloved and cherished prince, who always does anything to help people. Probably the most pure-hearted character in whole Céleste universe.

When he first left the Lost Paradise, the outside worlds decieved him a lot. All the violence, the hatred, the killing... But he still believes that people can be good in any world. So he travels around the infinity of universes, aiming to find places worth to be visited.