Tigress

Tigress is the princess of the Fire nation and Tod's most powerful ally.

About her
Born along with her twin brother Rajah to Firelord Vitaly and Firelady Machili, Tigress is a firebending prodigy. Her flames are just one step away from being blue. She is an ally to Tod, and later marries Po of the Earth Kingdom. Of the two siblings, Tigress is second-in-line to the throne, with her brother as heir.

Bending
Tigress is a master firebender, producing exceptionally hot flames.

Family
Tigress' family is her father, Firelord Vitaly, her mother, Firelady Machili, and her twin brother, Rajah.