Uchiha Obito

Uchiha Obito was a ninja of Konoha who was believed to have died during the Third Shinobi World War, but in truth he survived with the help of Madara. Distraught by the death of the girl he loved, he became a missing-nin and dedicated his life to end the  conflicts in the world and to bring peace, using Madara's identity as well the named himself Tobi. For years, Obito manipulated Akatsuki from the shadows to further his ambitions before and then eventually going publically with his agenda and starting the Fourth Shinobi World War.
Obito grew up not knowing who his parents were, a sad upbringing which led him to dream of becoming the Hokage one day so that the people of the village would acknowledge him. Obito arrived late for his enrollment in the Academy, but was relieved when Rin Nohara handed him his orientation-documents. He graduated at the age of 9 and was placed in Team Minato with Rin and Kakashi under the leadership of Minato. For their final test to become genin, Minato tasked his potential students with taking one of two bells from him in combat. After failing to take a bell on his own and seeing that Minato's skill was well above their skills, Obito agreed  for team work to get the bells. Minato passed all three of them as they succeeded in the real test.

The team later took part in the Chunin Exams, during which Obito arrived late for the second test in the Forest of Death,  because he stopped to help an elderly woman. When Team Minato ran across an enemy team, Obito attempted to impress Rin with the Uchiha clan's fire technique, but ended up choking on the candy that woman had given him and he was defeated by Mighti Gai. He trained hard between the second and third exams and told Rin his dream of becoming Hokage one day; however, he was eliminated in another bout with Gai, who was then beaten by Kakashi, allowing him to rise to the rank of chunin. Obito did attain the rank at the age of 11.
During the Third Shinobi World War, Kakashi was made in charge of the team for a mission to destroy the Kannabi Bridge, which would hinder Hidden Village of Earth from using HiddenVillage of Grass, as a relief point. Before the mission started, Minato and Rin gave gifts to Kakashi to celebrate his promotion to jonin, though Obito had forgotten. Minato was called to the front lines, leaving the team to carry on the mission alone. The three were then discovered by ninja and Rin was kidnapped. Kakashi elected to abandon Rin, believing that it was more important to finish the mission before concerning themselves with her safety. Obito became angry at the idea and insisted that they focus on her rescue. When Kakashi refused, Obito left on his own, remarking that Kakashi was worse than trash for abandoning his friends. Obito Also mentioned that he thought that White Fang was the greatest hero. Because those who break rules are trash but those who abandon

their friends are worse than trash.