Rei is a previous Fire Nation girl that ran away after discovering herself. She made a friend, Airon; and although he isn’t human, he’s the only one who understood her. After undergoing her training, she and Airon set out to find the truth behind the world. The truth behind history. Just as they succeeded, Airon got stolen by sandbenders. Now Rei travels with Aang and his group, in search of both of their companions. But as time progressed and they all got reunited, Rei realized that her Fire Nation heritage will never leave her. Now, she’s on the run.