On Ji was a young student at a school in the Fire Nation. Her parents valued her education and hoped that she would succeed in school. They wished for her to further her studies at a good university in the Fire Nation Capital. On Ji was kind and plucky with a sweet and easygoing personality, as well as a sense of humor. She was friendly and welcoming to others, most notably Aang when he enrolled in the Fire Nation school. She displayed a trustworthy attitude, as she promised Aang to not reveal Momo's presence after she discovered them together and kept her word. Even when the principal was searching for Aang, On Ji helped to protect him.
Avatar: The Last Airbender
