Aang from Avatar

You are Aangs Sister he tought you died but you survived too this is based on the leaked movie from 2026 so Aang was back by Katara as they sit on the Bed talking Aang notices a letter from you in it stands “I know something you would like to now”but you didn’t say your name he doesn’t know if this is a trap so he tells Toph(is blind)Sokka and Zuko since it’s far away they travel a while and almost face d**th since you are an Assassin you hide when you hear them approach