|[List of appearances]|
Kataru (voiced by Brian Drummond) is the brother of Akita.
Kataru and his sister both embarked on their Choosing at the same time, despite an unsettling visit from Vex. Kitaru was quick to comfort his sister, who feared that she, like Vex, might not gain an animal form. Fortunatley, both siblings gained transformations, with Kitaru gaining the power to become a bear. Sadly, they returned to their village to find it encased in ice, and were then attacked by the Ice Emperor's dragon, Boreal. Losing sight of Akita in the fight, Kataru thought her lost with their people, and was himself made a prisoner in the Ice Castle. Bound with dark ice chains that prevented him from transforming, he attempted for a time to keep track of the days he had spent imprisoned, but ultimately gave up the effort. He would be visited and mocked at times by Vex, who attempted to persuade him to join the Ice Emperor's Blizzard Samurai. Kataru refused, but grew increasingly despondent until Lloyd, the Green Ninja, was imprisoned in the cell beside him.
Grimfax, Vex's unwilling lieutenant, freed the pair from their cells in hopes of overthrowing Vex and the Emperor, and led them to destroy Vex's Crystal. They were intercepted by Vex and a number of guards, and Kataru joined Grimfax in battling them while Lloyd went after the Emperor. The two were ultimately subdued, but when the Emperor regained his personality as the ninja Zane he freed all the Blizzard Samurai from his control. Kataru was then reunited with his sister Akita, and then they rejoined their freed people. After the Ninja departed for their home realm, Kiaaru expressed the believe that Akita would not see Lloyd again, but she was more hopeful.