Ubau

Ubau is a pirate and the leader of the Sea Route of Silence Gang.

Ubau is a deceptive man witnessed by his posing as a harmless farmer in the town Naruto and his bodyguards stopped and offering the young man produce which contained a deadly mushroom. This also displayed the fact that Ubau is also quite intelligent as he was able to carry out this plan under the nose of several of Konoha's top-brass ninja.

Ubau, as a young child, found a special species of mushroom that could drain the chakra, stamina and even willpower of whomever that ingests it. Using these mushrooms, Ubau rose to be a "Pirate King" within the Land of Sea.