Unalaq

Unalaq is an incredibly powerful waterbender, the younger brother of Tonraq, father of Desna and Eska, uncle of Avatar Korra, and current chief of the Northern Water Tribe. A particularly spiritual man, Unalaq will serve as Korra's spiritual mentor.

Personality
Unalaq possesses a strong connection with the Spirit World. Because of this, he always believed himself to be better suited to rule the Northern and Southern Water Tribes than his older brother. He is a firm believer in the old ways of the Water Tribes and a true fundamentalist so far as honoring the spirits is concerned.

Trivia

 * In the children's novel series Seekers, which revolves around polar bear characters, Unalaq is a young male polar bear from the Star Island group and a hostile brother of Yakone from the same series.
 * Unalaq possesses a unique skill in waterbending which allows him to calm an angry spirit, and he is the only person known to be able to do this. Its aspects are similar to that of healing.