Arc 3Return to Konoha
Lin Chuan escaped Kusagakure, returned to Konoha, and was reunited with his family before Maruboshi Kosuke trained him in combat. Back at the Academy, he befriended Sasuke and trained with him and Naruto while secretly trading reports on Sasuke with Kabuto.
- Lin Chuan infiltrated Kusagakure as Amu, killed his Grass Ninja teammates and other targets, then fled after Kusagakure identified him as the killer.
- Lin Chuan crossed into the Land of Rain, killed the Grass Ninja pursuing him, and escaped the remaining ANBU by reaching the Land of Fire.
- Lin Chuan collapsed at Konoha’s gate with an intelligence scroll, and Hiruzen Sarutobi recognized him and confronted Danzo about his Root service.
- Hiruzen Sarutobi let Lin Chuan return home, where he reunited with his parents, and Maruboshi Kosuke took charge of his training.
- Maruboshi Kosuke trained Lin Chuan in weapons, taijutsu, and combat for two months before they returned to Konoha.
- Lin Chuan resumed the Academy and befriended Naruto, Shikamaru, Choji, and Rock Lee, while Kabuto recruited him to report on Sasuke in exchange for a Chakra Blade.
- Lin Chuan challenged Sasuke, pushed him to commit to getting stronger and avenging his family, then trained alongside Sasuke and Naruto.
- Lin Chuan gave Kabuto six months of reports on Sasuke and arranged to trade the next set for another Chakra Blade.