Banished Prince

Flame prince seems like a more angsty character to me and then the Zuko-Fire prince thing clicked and i went off that.

FP is the next in line for the fire kingdom but was cast out when his father died in an ambush and the kingdom was taken over. With no chance to return home he has dedicated his life to building a force that can avenge his father. On his journey he meets Fiona who gladly helps FP take back his kingdom. Now that his country was finally reclaimed, Flame prince worked to make his country a superpower of the world. Eventually though, the prince grew bored of a kings life and passed on the crown to his sister. He now travels around with Fiona to repay her(even though she keeps telling him he doesn't have to).

Oh! and I made his mount be a fire wolf cause it seemed wrong having flambos since their sentient and were once other beings.