Team Kakashi, originally known as Team Seven, is a team led by Kakashi Hatake and was formed after the members became genin, consisting of the three main characters of the Naruto series. The members were selected in order to balance out their talents: Naruto Uzumaki, the worst student in his graduating class, would benefit from Sakura Haruno's intelligence and Sasuke Uchiha's proficiency with ninjutsu. Sakura would similarly benefit from her more battle-capable team-mates, whereas Sasuke would benefit from being forced to work with others. It would be later revealed that Kakashi was chosen specifically to be the leader of Team Seven for two reasons: Being the student of Naruto's father and given the task of keeping the Nine-Tails at bay while unknowingly honoring the promise that Hiruzen Sarutobi made to Itachi Uchiha in secret to keep his younger brother safe and kept from going down a dark path. In time while training them, sharing similar traits to the latter, Kakashi noted the rivalry between Naruto and Sasuke to be similar of that to Obito Uchiha and himself and even more so of Jiraiya and Orochimaru. Prior to the official formation of Kakashi's Team 7, he flunked countless graduates and sent them back to the Academy. Throughout the series, the only consistent members of the team are Naruto and Sakura; with Sasuke defecting and being temporarily replaced by Sai, and Yamato serving as the team's captain in Kakashi's absence. During the crossover series, the main characters of the team is currently it's three original members (Naruto, Sasuke and Sakura), with Kakashi and Sai serving as major supporting characters.