Rafa and Misu

Rafa and Misu are brothers and sisters originally from the Northern Water Tribe. After Rafa's face became disfigured, Misu made it her goal to get his face back. The duo hoped to accomplish this by traveling to the Forgetful Valley and getting a face from the Mother of Faces.</ref

History
While the two were growing up, Misu was usually quiet and studious while Rafa was bold and brash. Rafa used to enjoy stealing items from the tribe's most powerful people, not because he needed the items but to prove that he could. However one day this backfired on him, and his face was left horribly disfigured. In order to try and help him, Misu began researching how to help her brother. While there, she discovered a spirit, the Mother of Faces, who visited the Fire Nation and gave out faces. She learned waterbending in secret, and took her brother and herself to the Forgetful Valley in hopes of meeting the face-giving spirit.

In 101 ASC, Team Avatar entered the Forgetful Valley in search of Ursa. It was there that they met the brother and sister, who originally attacked them using plantbending. The team later befriended the brother and sister, and Aang entered the Spirit World in hopes of locating the Mother of Faces for them.