As "The Legend of Korra" Book 2 awaits its release September 13, character bios on Nick.com have been updated with new characters and more information on what's to come this season.

In addition to bringing back the old gang like Korra, Tenzin, Mako, Bolin, and Asami, some new characters we will be meeting include Unalaq, Desna, Eska, Varrick, Bumi, and Kya. Tonraq, Korra's father, will also be heavily featured in "The Legend of Korra" Book 2.

Here are the official "Legend of Korra" Book 2 character bios:

Tonraq: "After leaving home in the Northern Water Tribe to settle further south, Korra's father had a lot of adjusting to do. That was before he realized his daughter was the Avatar. As a warrior and leader, Tonraq is greatly revered and respected in his small southern tribe. Despite being a powerful waterbender, however, he lacks a strong and crucial connection to the spiritual side of life."

Unalaq: "Chief of the Northern and Southern Water Tribes, Tonraq's younger brother, and Korra's uncle, Unalaq is a solemn man carrying a lot of responsibility. As a traditionalist, he's taken on the task of restoring the lost connection between the Southern Water Tribe and the Spirit World, but can only do so with the help of his Avatar niece."

Desna and Eska: "These two waterbending 16-year-olds rarely show any emotion besides boredom, due to the fact that they dislike most people, places, and things. Blood may not be thicker than water for this family, and as members of the Northern Water Tribe, Eska and Desna mostly see Korra as a southern rube, Avatar or not."

Varrick: "Self-proclaimed and self-made "Biz-bender" from the Southern Water Tribe, Varrick is pretty proud of himself. He spends most of his time traveling the world on his enormous yacht and living a fabulous lifestyle, at the expense of his poor assistant, Zhu Li. Always ready to cut a deal or make a new investment, he's constantly looking for ways expand his global shipping business."

Bumi: "What he lacks in bending skills, Bumi makes up for in leadership. Tenzin's older brother is renowned for his talent for strategy and courageousness, but his immaturity might make you think otherwise. He may be a respected commander of the United Forces now, but that doesn't mean he won't give his little airbending brother a noogie every now and then."

Kya: "Like a true waterbender, Kya is good at retaining a clear and cool head in times of distress. Around her brothers Tenzin and Bumi, however, she can become as unpredictable as a raging river. The second child of Aang and Katara, Kya was named after her grandmother, and always felt as stronger connection with her mother than her Avatar father."