Mako

Mako is a character and hero from the Avatar legend of Korra Universe. He is a firebender and the brother of Bolin. He was also once Asami's boyfriend

Mako's world was endangered by Discord and his Dystopia League and through Yakvone he bloodbends many of the citizens with some expections. Mako escapes with his brother to find help. Yakvone took over the town and Mako wants to overthrow his rule for the ones who want freedom. He joins forces with the rebellious V and his allies

The Multiuniversal War of Destiny
Mako and his brother appear and join forces with the heroes to fight Discord, Yakvone and his forces. Sigma to a lesser extent as well.