Obito Uchiha was teammates with Kakashi Hatake and Rin under the Fourth Hokage. Obito was frequently late for missions due to the random good deeds he would carry out, which greatly irritated Kakashi. He also seemed to have had a crush on Rin. When Rin is kidnapped during the Kakashi Gaiden arc, Kakashi, the current team leader, insisted that they continue the mission instead of saving her. Citing that those who do not save their teammates are no better than trash, Obito refused and eventually managed to persuade Kakashi to join him. During their rescue effort Kakashi lost his left eye as a result of an enemy ninja's attack, and Obito awakened his Sharingan to save Kakashi and defeat the ninja. Once finding Rin, Obito again saved Kakashi by pushing him out of the way of a rock slide, though has his right side crushed in the process. Unable to escape with his teammates, Obito had Rin implant his remaining Sharingan eye in Kakashi's damaged eye socket as a gift. In chapter 599 it is revealed that Tobi is actually Obito Uchiha who was teammates with Kakashi Hatake and Rin under the Fourth Hokage.
A coal miner, and one of Jörmungandr's and her sister's 5 fathers. (They adopted them)
The robot companion of Agarta, 3-5-10 assists Agarta with her work & can communicate with her as she enters the clients consciousness. He is responsible for collecting the "payment" for the services rendered by Agarta as well as storing and organizing her memories. His other duties seem include running & maintaining her ship & communicating with clients. He makes a reference to the fact that he was once human.
A missing-nin and S-ranked criminal, "The Masked Man" is considered a highly dangerous ninja, able to effortlessly defeat other jinchūriki like Yugito Nii as well as several of Konohagakure's top-level ninja. Menma (メンマ, Menma), a character that appears in Naruto 6: Road to Ninja, is the son of Kushina Uzumaki and Minato Namikaze in the alternate universe of Konohagakure, thus making him the "Naruto Uzumaki" of that world. Like his counterpart, he is the jinchūriki of Kurama, the Nine-Tails. (Source: Narutopedia)
Shibi is Shino's father. He is just as stoic as (if not even more so than) his son. He is a self-possessed figure, and the pride of Aburame. Shibi, like all members of his clan, has his eyes obscured by dark glasses which feature a single tassel hanging down from one-side. He has very spiky short black hair and a moustache. He typically wears a high collared outfit, while carrying a gourd on his back that is used for holding more kikaichū. He also tends to keep his hands in his pockets a lot, another trait he and his son share.
One of the four 'Coffin Knights' The four knights released from the coffins that Pazuzu attempted to keep hidden throughout Aegis of Uruk. Without Pazuzu, they have awakened and now roam the Tower without a master, attacking various climbers as they see fit. Gremica reveals that they are magical machines, created from the Dark Armour formerly used by the Sumar Empire (Red Knight, Blue Knight, Mirror Knight, and Hyper Knight) and their individual characteristics likely carried over. Henaro's motivation for climbing the tower is to recover the four knights by the orders of Amina and protect the king's shadow. (Source: Wikipedia)
Minato Namikaze was the Yondaime Hokage of Konohagakure and the man responsible for sealing the nine-tailed demon fox inside Naruto Uzumaki when he was born. Doing so cost him his life, and before dying he asked that the villagers not see Naruto as the monster within him, instead wanting him to be viewed as a hero, a request ignored by the villagers. "Namikaze" translates literally as "Wave wind." "Minato" translates as "Harbor" or "Port." Minato shares a number of traits with Naruto, namely in appearance and attitude. Such comparisons are common throughout the first part of the series, and in the second as well. The second part of the series reveals that Naruto is his son, hence the comparisons, born to Kushina Uzumaki. In his youth Minato, along with two other unknown Genin, was a student of Jiraiya. Prior to becoming Hokage, he was also the sensei of Kakashi Hatake, Obito Uchiha, and Rin Nohara. Minato is said to be one of the greatest ninja Konoha has ever produced, with natural talent that had not been seen in many years. He specializes in using the Hiraishin no Jutsu, a technique the Second Hokage, Tobirama created, which essentially allowed him to teleport to any location with the use of a special seal. By attaching the seal to a kunai or an enemy, Minato could teleport to the location of the seal unnoticed, allowing him to wipe out nearby opponents almost instantly. This ability led to his title as "Konoha's Yellow Flash," and it caused him to be seen as so dangerous that a flee-on-sight order was given in regards to him during the Third Ninja War. He also created the Rasengan, a technique that does not rely on hand seals but instead uses a concentration of spinning chakra in one's palm that causes immense damage to its victim on contact. Later in the series it is revealed that technique is actually incomplete. Minato had planned to add his own nature manipulation training to the Rasengan, making it even more powerful, but could not manage to prior to his death. Later during the war he is resurrected by Orochimaru with Edo Tensei alongside all the deceased Hokage on Sasuke's demand. After Sasuke chooses to protect the village, he goes and joins the battlefield along with his fellow Hokage to help the Allied Shinboi Forces in their fight with the Juubi.