Avatar X Sully Reader - Tumblr Posts

Hey I need some help looking for a story. It was a series on Avatar 2. The reader was Trudy's little sister. Jake and Neytiri adopted her and she grew up with all of them. When they were leaving she suggested they leave her but they took her. She ends up getting kidnapped and when she nearly died she gets her soul transferred into an avatar. Can anybody help me please find this story?!