Obito Uchiha served under the Fourth Hokage as part of a three-person squad alongside Kakashi Hatake and Rin. He had a reputation for showing up late to missions—not out of laziness, but because he'd stop to help random people along the way. Kakashi found this infuriating, though Obito's constant tardiness spoke to his genuine heart. He also harbored feelings for Rin, something fans have always picked up on.
Everything changed during the Kakashi Gaiden arc. When Rin got kidnapped, Kakashi wanted to push ahead with their original mission, but Obito refused. He famously declared that shinobi who abandon their teammates are worse than trash—a line that's stuck with fans ever since—and managed to drag Kakashi into a rescue mission. The operation went wrong fast. Kakashi lost his left eye in combat, but Obito awakened his Sharingan to turn the tide and protect him. They found Rin, but then a rock slide came down. Obito shoved Kakashi out of harm's way, taking the full impact on his right side. Crushed and dying, he asked Rin to transplant his remaining Sharingan into Kakashi's damaged eye socket—a final gift that would shape the rest of Kakashi's life.
Content compiled by AnimeList.moe from publicly available sources.
