The Gatekeeper was a giant crab who guarded the moon entrance against the outside world. It is said to be one of the members serving as Guardian of the Otsutsuki clan. He is one of the supporting characters in Naruto: The Last Movie and the manga that Masashi Kishimoto wrote and illustrated.
|First Appearance in Anime||Naruto: The Last Movie|
It is said that Toneri Otsutsuki ordered the Gatekeeper to guard the moon entrance. This was when Shikamaru Nara, Sakura Haruno, Sai, Naruto Uzumaki and Hinata Hyuga encountered the Gatekeeper after they entered the Moon entrance area. The five person team were given the mission to rescue Hanabi and check the crumbling moon reason and who was behind everything.
While Sai, Sakura, and Shikamaru were waiting for Naruto and Hinata to come and investigate the entrance gate, a giant crab came out of nowhere and attacked them. That was after Shikamaru told them that the Gatekeeper had created the bubble trap which was when he realised that the crab was the Gatekeeper.
Shikamaru told Sai and Sakura not to touch any bubble because it would trap them in a Genjutsu. Sai then used his Fuijin and Raijin scrolling beast Technique to fight the Gatekeeper while Shikamaru held the Gatekeeper with his Shadow Sewing Technique(Shadow Stitching Jutsu). That allowed Sakura to use her brutal strength to destroy the Gatekeeper.
Gatekeeper was loyal to his work and attacked Konoha ninjas when they infiltrated the moon entrance date.
The Gatekeeper looked like a giant blue color fiddle crab. His right Pincer was way bigger than his left, which had a red color with a yellow color outline. He had a white crown-like structure on his head and eight legs, just like a normal crab.
Gatekeeper used Bubble Release (Awaton) which trapped anyone that touched it in a Genjutsu as it did to Naruto. Shikamaru told Sai and Sakura not to let the bubble burst or else they would fall into Genjutsu. Gatekeeper was physically very strong, with a body so hard, like metal, that even a kunai could not do anything ot it.
A. The Gatekeeper appeared in Naruto's movie: The Last.
A. Sakura was the one who killed the Gatekeeper with the help of Sai and Shikamaru.