Nini

Nini was a resident of the Southern Water Tribe and friend of Kaya's around twenty-five years before the start of the series. She and her entire family disappeared under mysterious cirumstances during a snowstorm, and were never seen again. It is strongly hinted at that she froze to death.

Legend
In The Puppetmaster, Katara recounts how after Nini's disappearance, the men of her village formed a search party to look for her and her family. Kaya, who had stayed behind in Nini's house, was alone when she heard a voice behind her, and reportedly came face to face with Nini, who complained about being cold. When she brought the others back to see her, she had disappeared; rumors persisted in the southern water tribe that their house was haunted, and afterwards many villagers reported seing smoke rising from her house's chimney, as if she were still trying to warm herself.

It is unknown what happened to Nini's house after the Southern Water Tribe was destroyed in the Fire Nation raids.