Kelsang

Kelsang was an airbending monk who belonged to the party of Yun, an Earth Kingdom man who was falsely identified as Avatar during the early life of Kyoshi, the actual Avatar.

History
At some point, Yun and his companions confronted Tagaka, a pirate queen, on an iceberg at sea. Unknown to them, the pirates had lured them into a trap, as waterbenders had hidden under the ice to ambush them. When the battle began, most of Yun's allies were dragged into the ice. Thanks to his extraordinary reflexes, Kelsang avoided this fate by jumping into the air and using his airbender staff to fly away. He then attempted to save Yun who was locked in a duel with Tagaka, but the purported Avatar urged him to try stopping Tagaka's pirate fleet instead of helping him.

Accordingly, Kelsang changed course, but was thwarted by Tagaka. The pirate queen targeted him with a storm of tiny icicles. She thus destroyed his glider, whereupon the monk fell toward the sea.