A Firebender with a serious side, the handsome and brooding Mako has always taken care of his little brother, Bolin. Growing up on the streets has given him a hard edge, but Mako loves his brother and will do anything to protect them both. Intensely focused on getting their team through the Pro-bending tournament and winning the jackpot, Mako's tightly controlled world gets a little more chaotic when Korra enters the picture.
Having a stoic and brooding personality, Mako is generally aloof and indifferent, though he is not incapable of genuine kindness. He tends to be critical and controlling, stemming from a life on the streets and a drive to protect his little brother, which forced him to take on adult responsibilities at a young age. In light of the brothers' pasts, he cares deeply for Bolin and is very protective of him. Living on the streets has given him a "hard-edge".
He seems to loosen up a bit when he's with Bolin and Korra, and also when he achieves something. For instance, when the landlord/owner of the pro-bending arena gave him the winnings of the previous tournament, Mako had a large grin on his face.