Uchiha Obito

Obito Uchiha (うちはオビト, Uchiha Obito?) was the teammate of Kakashi Hatake and Rin under the Fourth Hokage. Obito was frequently late for missions- according to him, due to the random good deeds he would carry out- which greatly irritated Kakashi. Somewhat similar to Naruto, Obito often spoke without thinking, a trait that the Fourth Hokage considered a flaw, but was very impassioned and persuasive in doing so, eventually convincing Kakashi of his values. 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 rockslide, 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. As the rocks continued to cave in around them just before his death, Obito wished that he could have spent more time with his teammates and that he could have admitted his feelings to Rin.

Obito's name is engraved on the monument of ninja who have died in battle, which Kakashi often visits in Obito's memory in his spare time. As a result he is often late due to losing track of time, causing him to develop the trait that once annoyed him. Kakashi also adopts Obito's devotion to his teammates, and makes the concept of valuing one's team over a mission's completion; a key element to how he tests aspiring Genin.