Prior to Aang's arrival in the Spirit World in search of Koh, a curly-tailed blue nose lost its face to the face stealer. Upon arriving, Aang heard this creature as it sat outside Koh's lair and was shocked to see that it was missing its face. After entering Koh's lair, Aang soon found out that Koh had stolen the creature's face and added it to his collection. After he was knocked unconscious during his duel with Azula and Zuko in the Crystal Catacombs, Aang saw a few more curly-tailed blue noses throughout his journey in the Spirit World.