Karu

"fire"

- It's okay, we're here to help you, Avatar Korra.

Fire Sage Karu resides on a Fire Nation island, together with other Fire Sages, guarding the sanctuary there. When Avatar Korra was washed ashore on their island, following her fight with a dark spirit, Karu was among the sages who found and rescued her.

History
In 171 ASC, Karu and two other Fire Sages found the unconscious Avatar washed ashore on their island. The sages immediately decided to help, but when Korra briefly regained consciousness, she panicked, using her airbending to push them back. Karu attempted to calm her down, stating that they were there to help her. However, when he addressed her as "Avatar Korra", she confusedly asked who they were referring to. Alarmed, he inquired what happened to her, though she did not know and subsequently lost consciousness once again.

In order to help her, the three sages took her back with them to the temple. There, the head sage ordered Karu and the others to lower Korra in a well of healing water to restore her Avatar spirit.

During this process, Karu anxiously asked his superior if they should pull the Avatar up, but she replied in the negative, as Korra still had to connect with her "deepest Avatar memories". Some time later, Karu witnessed Karu regaining consciousness, after she successfully cnnected with her Avatar spirit.