Naruto (manga)
Kisame Hoshigaki, a rogue ninja from the Hidden Mist Village. He is Itachi Uchiha's partner. He is one of the Seven Swordsmen of the Mist. Kisame uses a living scaled sword called Sharkskin. Sharkskin absorbs his enemy's chakra and gives it to Kisame. This gives him more stamina.  He joined the Akatsuki to see a world without lies.  He attacked Killer Bee. He became a spy.  He was captured sending the jinchuriki's location to Tobi, then killed himself.