Tobi

Tobi (whose original name is Obito Uchiha) is the central antagonist of the Naruto franchise and the leader of Akatsuki. He is a fallen hero from Konohagakure, the Village Hidden in the Leaves, who follows Madara Uchiha's goal for his own gain. Despite appearing late in the story, Tobi orchestrated the attack of the Nine-Tailed Demon Fox, the Massacre of the Uchiha Clan, and most of the conflict driving the story from behind the scene.