TV-Series
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Pain, whose true name is Nagato, is a major antagonist in Naruto Shippuden and the public leader of the Akatsuki organization. He was born in the war-torn Amegakure, the Hidden Rain Village, and was orphaned as a young child during the Second Shinobi World War when his parents were killed by Konoha ninja. This tragedy triggered the first manifestation of his Rinnegan, a legendary eye technique. Unknown to Nagato, these eyes had been implanted in him years earlier by Madara Uchiha as part of a long-term scheme. After his parents' death, Nagato lived alone until he was taken in by two other war orphans, Yahiko and Konan. The three survived together and were eventually discovered by the legendary ninja Jiraiya, who recognized Nagato's eyes as those of the Sage of Six Paths and believed the boy might be destined to bring peace to the world. Jiraiya trained the three orphans for about three years, teaching them ninjutsu and instilling in them a dream of ending the endless cycle of war.

Inspired by their training, the three friends founded Akatsuki with the goal of achieving peace without resorting to the violence of the great nations. The organization grew, but their idealism was shattered when they were betrayed by Hanzo, the leader of the Hidden Rain Village, who saw the group as a threat and cooperated with Danzo Shimura of Konoha's Root to eliminate them. Trapped in a confrontation, Yahiko took his own life to force Nagato to survive, and Nagato's legs were crushed by an explosive attack during the ensuing chaos. The betrayal and Yahiko's death transformed Nagato completely. He abandoned the idea that peace could be reached through words or compassion and adopted the name Pain, becoming a hardened figure who believed the world could only learn peace through suffering. He conquered the Hidden Rain Village, killed Hanzo, and turned Akatsuki into a powerful mercenary organization, all while secretly being guided by a figure claiming to be Madara Uchiha.

Pain's personality is calm, calculating, and profoundly serious. He speaks with the certainty of someone who believes he is beyond ordinary human judgment, and he is often referred to and refers to himself as a god. He is not portrayed as cruel for its own sake; rather, he is driven by a coherent but grim philosophy. Having experienced the horrors of war, the death of his parents, and the loss of his best friend, he concluded that people can never truly understand one another through words alone, and that hatred and conflict will always continue as a result. His solution was to make the entire world share the same pain he had endured, so that humanity would finally understand each other and abandon war out of fear of mutual destruction. His central motivation is to capture all the tailed beasts and use them to create a superweapon of unmatched destructive power, forcing the nations of the shinobi world into a fragile peace maintained by the threat of annihilation.

In the story, Pain serves as the public face and supreme leader of Akatsuki. He is the one who commands the capture of the tailed beasts and is ultimately tasked with capturing the Nine-Tailed Fox sealed inside Naruto Uzumaki. Before doing so, he detects Jiraiya infiltrating the Hidden Rain Village and kills his former master in a brutal battle, a moment that deeply affects Naruto. He then launches a devastating assault on Konoha, destroying the village almost single-handedly and killing many characters in the process. His invasion forces Naruto to return and face him. In their confrontation, the Six Paths of Pain prove nearly overwhelming, but Naruto manages to defeat all six bodies and track down the real Nagato. Rather than finish him off, Naruto listens to Nagato's painful history and offers a different answer to the cycle of hatred, citing the teachings of Jiraiya and the belief that understanding and forgiveness can break the cycle without more suffering. Deeply moved, Nagato acknowledges that Naruto may be the true child of prophecy and uses his remaining strength to perform a forbidden technique that resurrects the villagers he had killed, dying as a result of the immense cost.

Nagato's key relationships define his character arc. His bond with Yahiko was the foundation of his original idealism, and after Yahiko's death Nagato used his friend's body as his primary avatar, the Deva Path, so that Yahiko would continue to lead Akatsuki in spirit. His relationship with Konan is one of deep loyalty; she remained at his side even after his body became frail and immobile. Jiraiya was both his mentor and a figure of enormous emotional weight, and killing him represented Nagato's rejection of the peace his teacher had hoped for. His relationship with Naruto is the most significant in his later development, as Naruto serves as a mirror of what Nagato might have been had he grown up in peace, and it is Naruto's argument that finally gives Nagato hope for the future. The true Madara, via the masked figure Obito, manipulated events behind the scenes, including the circumstances that led to Yahiko's death, meaning Nagato was partly a pawn in a larger plan.

Nagato is one of the most powerful characters in the series. His enormous chakra reserves, inherited from the Uzumaki clan, allowed him to wield abilities that taxed ordinary shinobi to their limits. His Rinnegan granted him command over the Six Paths of Pain, a technique by which he controlled up to six reanimated corpses from a great distance using chakra receivers embedded in their bodies. Each path had a distinct specialty: the Deva Path manipulated gravitational forces, allowing him to repel everything around him with Shinra Tensei, pull targets toward him with Bansho Ten'in, and create a massive orb of earth and rock with Chibaku Tensei to imprison enemies. The Asura Path could transform parts of its body into mechanical weapons and armor. The Human Path could read a person's mind and tear out their soul. The Animal Path summoned a variety of powerful creatures that shared Nagato's vision. The Preta Path absorbed chakra and whole ninjutsu techniques. The Naraka Path could summon the King of Hell to interrogate victims and restore damaged bodies. All six paths shared a single field of vision, eliminating blind spots and enabling perfectly coordinated attacks. Beyond the Six Paths, Nagato could summon the Gedo Statue, the husk of the Ten-Tails, and use the Outer Path to control life and death itself, most notably through the Samsara of Heavenly Life Technique, which resurrects the recently deceased at the cost of the user's own life. Before his body was crippled, he was also a skilled combatant trained by Jiraiya, a sensor type with mastery over all basic nature transformations. Pain's legacy in the story is that of a tragic figure whose intense suffering turned him into a self-proclaimed god, and whose final act of trust in Naruto signaled the possibility of breaking the very cycle of hatred that had consumed him.