Aang

Aang joined the team at the request of his father, Shadow. Being the youngest member, he relied upon Jackson for mentorship and guidance. At the same time, he watched over his younger sibling. Upon becoming the Avatar, his value to the team increased dramatically, as did his power. Some say he was the most powerful member ever. Without a doubt, he was overall one of the most powerful benders who ever lived. Interestingly, Aang and Bennett are the only two people to share the Avatar spirit at the same time. After the defeat of ABF, he continued to stay with the team until much later in his life.