One of my favorite things about the "ergonomics" of haskell is being able to leave underscores in code that isn't finished yet, and the type checker still works and provides useful information about the incomplete code. ("holes" --
Resurfacing under the names of Tobi (トビ, Tobi) and Madara Uchiha himself, Obito subtly took control of the Akatsuki, using them as a means to advance his machinations, eventually going public and starting the Fourth Shinobi World War.
Killer B (キラービー, Kirā Bī, Viz: Killer Bee) is a shinobi from Kumogakure. He is the most recent jinchūriki of the Eight-Tails, Gyūki, though, unlike his predecessors, he was able to befriend it and hone its power for Kumo's benefit. Despite being responsible for the village's protection, B aspires to be the world's greatest rapper.
Kakuzu (角都, Kakuzu) was an S-rank missing-nin from Takigakure and a member of Akatsuki who was partnered with Hidan. Kisame Hoshigaki jokingly referred to them as the Zombie Combo (ゾンビコンビ, Zonbi Konbi, English TV: Zombie Pair), due to the fact that, in differing senses, they could not die.
Gaara (我愛羅, Gaara) is a shinobi of Sunagakure. He was made the jinchūriki of the One-Tailed Shukaku before he was born, causing the villagers of Suna to fear him as a monster. With nobody to connect to, Gaara grew up hating the world and looking out only for himself, giving his life meaning by killing anyone he came across.
Obito Uchiha (うちはオビト, Uchiha Obito) was a member of Konohagakure's Uchiha clan. He was believed to have died during the Third Shinobi World War, his only surviving legacy being the Sharingan he gave to his teammate, Kakashi Hatake. In truth, Obito was saved from death and trained by Madara, but the events of the war left Obito disillusioned with reality, and he inherited Madara's plan to create an ideal world.
Naruto Uzumaki (うずまきナルト, Uzumaki Naruto) is a shinobi of Konohagakure's Uzumaki clan. He became the jinchūriki of the Nine-Tails on the day of his birth — a fate that caused him to be shunned by most of Konoha throughout his childhood. After joining Team Kakashi, Naruto worked hard to gain the village's acknowledgement all the while chasing his dream to become Hokage.
Sasuke Uchiha (うちはサスケ, Uchiha Sasuke) is one of the last surviving members of Konohagakure's Uchiha clan. After his older brother, Itachi, slaughtered their clan, Sasuke made it his mission in life to avenge them by killing Itachi. He is added to Team 7 upon becoming a ninja and, through competition with his rival and best friend, Naruto Uzumaki, Sasuke starts developing his skills. Dissatisfied with his progress, he defects from Konoha so that he can acquire the strength needed to exact his revenge.
Madara Uchiha (うちはマダラ, Uchiha Madara) was the legendary leader of the Uchiha clan. He founded Konohagakure alongside his childhood friend and rival, Hashirama Senju, with the intention of beginning an era of peace. When the two couldn't agree on how to achieve that peace, they fought for control of the village, a conflict which ended in Madara's death. Madara, however, rewrote his death and went into hiding to work on his own plans. Unable to complete it in his natural life, he entrusted his knowledge and plans to Obito shortly before his actual death. Years later, Madara would be revived, only to see his plans foiled and ultimately, and finally, realising the error of his ways and making amends with Hashirama before his final death.
Uzumaki Nagato (Pain)
Nagato (長門, Nagato) was a shinobi of Amegakure and descendant of the Uzumaki clan. Forming Akatsuki alongside his friends (and fellow war orphans) Yahiko and Konan, Nagato dreamed of bringing peace to the violent shinobi world. However, following Yahiko's death, Nagato adopted the alias of Pain (ペイン, Pein) and, along with Konan, began leading a new Akatsuki — one that would force the world into peace using any means necessary.