Mako

Mako is a firebender from a multicultural family who grew up in the streets of Republic City as an orphan with his younger brother, Bolin, after their parents were killed by a firebending muggler. Later, he became a Pro-Bender and the captain of the Fire Ferrets, and then a member of the Republic City Police Department under Chief Lin Beifong and a core member of Team Avatar. He is also the main deuteragonist of The Legend of Korra franchise.