Exhausted and overwhelmed with sorrow and grief at his part in Rin's death, Kakashi lost consciousness and passed out while Obito, whose own rage and grief manifested itself in his new wood based abilities, went on a rampage and brutally killed all the Kirigakure ninja. Though Kakashi technically was the one who killed Rin, Obito left him alive, and he was later found by Konoha reinforcements. In the anime, despite his growing career, Kakashi was still haunted by having killed Rin with his own hand, having nightmares and visions that visibly shook him. Since then, Kakashi avoided his fellow classmates.