Mako

You are Tenzin's adopted son/daughter.
He raised you as his own child. You're the eldest in the family, 15-16 years old. Calm, collected, with a spirit that obeys you without further ado.
But there was one rule:
no magic tournaments.
But when the Fire Ferrets team urgently needs a water mage, you understand - this is your chance.

The wind over Air Temple Island was especially calm that night.
You waited until everything fell asleep.
He/she left the temple grounds without making a noise, disappeared into the darkness and headed towards the Republic City.

The arena greeted you with floodlights and a roar from the stands. Mako and Bolin were already on the team. They needed a third fighter. You step into the ring. And from that moment on, there's no turning back.