Taaka

Taaka was Svenna's female cousin who took “care” of her cubs, Stellan and Jytte (whom at the time were named First and Second, after their order of birth) when she surrendered herself to work for the Timekeepers of the Ice Cap. Svenna gave her a filing stone from Ga'Hoole as a token of gratitude for watching over her cubs. When Svenna left the den after delivering her cubs, Taaka unveiled her true nature. She showed disregard and neglect to Stellan and Jytte, and she abused her own cubs. Taaka especially mistreated her third cub, which she named Third. She forced Stellan and Jytte to be called "Fourth" and "Fifth", despite their ages being greater than that of her own cubs. Taaka did not share the halibut she hunted, did not let Stellan and Jytte outside, and she snarled and yelled at them and her own cubs. As Stellan gnawed on a bone in the cave, he noticed its unfamiliar taste, which was because it belonged to a polar bear cub, thus, revealing Taaka to be a cannibal. He realized that Taaka was starving them so that she could eventually feast on their remains, and he told Jytte. Taaka was asleep when Stellan and Jytte escaped from her den.Later, she attempts to give up Third to the Rougers to be a “Tick Tock” but Third is warned by his prophetic dreams. She also is a spy.

The Den of Forever Frost
Thought not present in person, it was clear from her cub Second, now named Froya, that she had abused Froya next until she had run away. The final cub, First, had stood aside while the abuse had happened.

The Keepers of the Keys
After Svenna escaped from the Ice Clock, she went to Taaka's den, where she had left the cubs. Before confronting Taaka personally, she had seen Taaka consort with Roguers and praise the Grand Patek, revealing that Taaka was either an elite Rouger herself or an ally of them. First was nowhere to be found and presumably had been given by Taaka to the Rougers to be a Tick Tock. Svenna at first confronts her, asking about the cubs, but Taaka plays dumb, saying they were older by now and had left. When Svenna mentions the Rougers, however, Taaka tries to kill her. Eventually during the fight, Taaka goes for a skylblad and tries to kill Svenna with it, but Svenna gets ahold of it and it kills Taaka instead. The weapon disappeared upon her death, having met its maximum amount of uses.

Lago was present at her death and sensed from Svenna's scent that of her sister and realized that her sister, Illya/Galilya was at the Ice Cap.