Madara Uchiha was a legendary shinobi who led the Uchiha clan prior to, and after the formation of Konohagakure. After allying with his rival, Hashirama Senju and the Senju clan, he and his clan helped in the founding of Konoha. After being reincarnated by Kabuto Yakushi during the Fourth Shinobi World War, he becomes one of the major antagonists in the series.
Frustrated when a reincarnated Nagato is sealed by the recently freed Itachi Uchiha, Kabuto finds himself forced to use his trump card but it's only after Naruto Uzumaki takes out several more reincarnated shinobi, that he has Mū summon the reincarnated Madara to the field. Forcefully removing his coffin's lid before voicing his assumption that Nagato had finally used the Outer Path: Samsara of Heavenly Life Technique to bring him back from the dead, Mū corrects Madara, explaining that Summoning: Impure World Reincarnation had been used instead. Somewhat shocked by the manner of his revival, the two confront the Fourth Division. Upon noticing the forehead protectors of the allied army, Madara asks who is responsible for the Impure World Reincarnation. However, as Mū does not know, Kabuto takes full control and, speaking through him, identifies himself as Tobi's assistant before informing Madara that he had been restored to an extent beyond even his prime. Finding it rather dreary to be spoken to through a pawn, Madara questions Kabuto with what he knew of his prime but admitting his ignorance, Kabuto requests a demonstration.