Kisame was from the Hidden Mist village. He has shark-like teeth similar to the other Seven Swordsmen, but also the appearance of a shark as well. He has the greatest amount of chakra of all Akatsuki, 1/3 of his chakra being equivalent to what Neji had seen Naruto use in the Chuunin Exams. He is very overconfident in battle and has a dark sense of humor, seen when he proposed to cut off Naruto's legs so he cannot run instead of knocking him unconscious. He works well with his partner Itachi also. During battle he can create his own water source and can create the ultimate battle field for himself. Despite his vicious appearance and actions, Kisame acts and speaks in a polite manner.
Kisame was first shown in the Return of Itachi arc with Itachi Uchiha. Kakashi was waiting for Sasuke at a Dango house when he happened to see Asuma and Kurenai. Sasuke finally arrived and noted how odd it was to see Kakashi there before him. Two cloaked customers sat drinking tea nearby almost instantly disappear with Sasuke's arrival. Kakashi nodded to Asuma and Kurenai, and they both took it as a sign to chase the mysterious people down, leading them to a bridge, where Asuma and Kurenai have the two people reveal themselves, only to see that it was Itachi Uchiha. Kisame introduced himself also, seeing as he thought it would be polite. Asuma and Kurenai decided to take Itachi and Kisame down right then and there, and the battle began. Kisame revealed his large blade and attacked Asuma. Eventually Kakashi came to aid Asuma and Kurenai, but was eventually defeated by Itachi's Tsukuyomi technique. Kisame and his partner decided to make a run for it after Gai showed up to help.
Itachi came to the Leaf village to capture Naruto, but Naruto wasn't there and they began searching for him, they eventually found him traveling with Jiraiya. Kisame and Itachi were worried about having to fight Jiraiya so they devised a way to split the two apart, Itachi used a genjutsu on a beautiful woman to lure Jiraiya away and tried to capture Naruto when he returned to his hotel room. Jiraiya however wasn't fooled by their trick and appeared to save Naruto, declaring that he'd kill Itachi and Kisame. Sasuke also arrived though and wanted to fight Itachi himself, Jiraiya and Kisame stood aside and let the two brothers fight, but Jiraiya saved Sasuke when he lost and forced Kisame and Itachi to flee.
Pein used his Shapeshifter technique to create a perfect copy of Kisame (albeit possessing 30% of Kisame's chakra) to stop Gai's team while they were trying to rescue Gaara. Kisame wanted to toy with Gai whom couldn't remember him, but Gai's teammates proved to be troublesome and he managed to trap them in Water Prisons while he and Gai fought. The fight was even, and Gai was even capable of robbing Samehada from Kisame's herculean grip twice overall, however the second time he attempted to use the sword himself and it wounded his hands. The threat of his students drowning prompted Gai to release 6 of the 8 gates and quickly dispatch Kisame, who reverted back into the person used for the technique. Kisame was controlling the clone from a distance and was quite amused.
Later, Kisame was sent with Itachi to capture Roushi, the Yonbi Jinchuuriki. Kisame stopped Team Hebi and asked Sasuke to go alone to face Itachi and stayed to make sure the others didn't follow. While waiting, Kisame remembered Suigetsu and the two decided to fight to kill some time. Their fight was interrupted by Zetsu when he came to get Kisame and they brought Team Hebi to meet with Sasuke. While in the conference room, Suigetsu was agitated and attacked Kisame, but Madara stopped him. Kisame then helped to extract the Eight-Tailed beast after Team Hebi, now calling themselves Team Taka, captured Killer Bee. But found that Sasuke was tricked into carrying back a tail of the Eight-Tailed beast. After Madara revealed his identity, Kisame recognized him as the former Mizukage.
Madara sent Kisame to capture Killer Bee after Sasuke failed, and found him being taught to sing enka by Sabu. When Kisame appeared, Sabu's racoon summon, Ponta attacked, but was knocked aside. Sabu then attacked Kisame himself with a giant axe, this is when Killer Bee threw an electrified pencil at Kisame. Kisame managed to avoid it and counter attacked by flinging Samehada at Killer Bee, but he also dodged. Sabu attacked with his giant axe but Kisame blocked it, however Killer Bee threw one electrified sword and attacked with his other, the thrown one stabbed Kisame in the arm but Kisame managed to block Killer Bee's attack with Samehada, which absorbed the lightning chakra around it.
While in a contest of strength, Killer Bee used his 4-tailed form and tried to headbutt Kisame, but Samehada absorbed it the Bijuu's chakra shroud. Samehada grew twice as large and it's revealed to have a mouth with sharp teeth and a tongue. Killer Bee used a 7-tailed Bijuu chakra shroud and attacked, but Kisame managed to dodge and absorb 6 of the chakra tails. Since that didn't work, Hachibi wanted Killer Bee to release him but Killer Bee refused, saying that Sabu and Ponta could end up getting killed and anyone nearby would spot him and tell Raikage. So Killer Bee used an 8-tailed Bijuu chakra shroud and attacked Kisame again, it was too much for Samehada to absorb and Killer Bee tore Kisame's chest open. However before Kisame died, he fused with Samehada, it covered itself around Kisame's body, healing him and turned him even more into a shark with all the chakra Samehada absorbed. He then used Great Exploding Water Shockwave and then used Water Prison Shark Dance to turn the battlefield into a giant dome of water, taking advantage of his his new form. Sabu said that Killer Bee has to get the sword away from Kisame, but Kisame taunted them by saying they can try.
Killer Bee tried to get Sabu and Ponta out of the water before they drowned, however there didn't seem to be any end and Kisame was right behind him. Hachibi told KIller Bee that the dome of water is moving with Kisame, so if he wanted to save his friends, he had to get Kisame to go in the opposite direction. Killer Bee tried this, but Kisame went to attack Ponta and Killer Bee tried to stop him, then Kisame turned and attacked Killer Bee. Killer Bee used a partial transformation to make the Hachibi's tentacles to come out of his body and wrap around Kisame and pulled him away from Sabu and Ponta, but Kisame was draining chakra from Killer Bee while he did this.
Killer Bee decided to spit ink to blind Kisame and try to get out of the water before he ran out of breath, but Kisame could detect his chakra and started attacking. Seeing that Killer Bee was drowning, Kisame ended his jutsu and transformed back and was about to cut off Killer Bee's feet... but Samehada attacked Kisame, Samehada chose Killer Bee and started giving him chakra. This prompted Kisame to kick Samehada away and just use one of Killer Bee's swords. Kisame was about to cut off Killer Bee's leg, however he was stopped by the Raikage and his bodyguards who saw Kisame's giant water jutsu and sensed Killer Bee's chakra. Raikage and Killer Bee then attacked Kisame at the same time, decapitating Kisame.
It has recently been revealed that the body of Kisame is actually a clone of Zetsu. The real Kisame hid himself within Samehada in order to infiltrate Kumogakure. He was also at the meeting that Killer Bee attended and is currently on the island still inside Samehada while Killer Bee and Naruto are still training together.
After Naruto was done with his training, he had gained extraordinary abilities, one of these abilities includes sensing negative emotions which revealed Kisame's hiding spot and engaged him. Kisame knowing, he was outclassed, fled the scene while Naruto was hindered. He ran through the waterfall and bumped into Might Guy whom confused Kisame for his inner darkness and attacked him. The others were quick to tell Gai that it was an Akatsuki member, although Gai himself still didn't remember him. Killer Bee reminded everyone that Kisame has crucial information and can't be allowed to escape.
During this Samehada abandons Kisame and takes all of his chakra with it and runs to Killer Bee. Kisame took the opportunity to use Samehada to siphon nearly all of Killer Bee's chakra into himself. Aoba tried to paralyze Kisame with a jutsu, but Kisame absorbed it, during this Gai tried to kick Kisame but he blocked it. Kisame used Water Shark Missile to attack and took the opportunity to try to escape with his information. Gai used the Gates and Killer Bee threw him towards Kisame, He arrived in time to see Kisame putting a scroll with information inside the mouth of a summoned shark. To cover the summonings escape into the ocean, Kisame used Thousand Sharks Eating to create a tidal wave of shark-shaped water to attack Gai with, but Gai uses Morning Peacock to destroy them all.
Gai decides to use an incredibly powerful ability called Afternoon Tiger and Kisame decides to counter with Giant Water Shark Missile. As the two are about to clash, Kisame boasts that his jutsu absorbs the chakra from other jutsus and become more powerful, but Gai boasts that his technique isn't actually ninjutsu and it bursts Kisame's jutsu and leaves Kisame on the ground, and Gai gets the scroll and knocks Kisame out.
They decide to have Aoba draw information from Kisame's unconscious mind. During this, he starts to see glimpses of some of the things that happened in Kisame's past. He sees Kisame being ordered to protect information that a group of Mist ninjas have and not to let it get into the enemy's hands, which upon attack Kisame killed them himself so they wouldn't reveal that information. It then shows him killing his master, Fuguki, and taking Samehada from him when he learned that he was selling information to their enemies. He's confronted by Yagura who approved of Kisame's actions, but Kisame was upset. Even killing his own allies when the mission calls for it, he didn't know if that made him a friend or foe and said the world revolves around lies.
He's then surprised by a shadow of a man appearing behind Yagura. This man offered Kisame a place in a group he's forming and Kisame realizes he's the real 4th Mizukage, Uchiha Madara. Madara explains his plan to Kisame and offers him a place in his organisation. This is when Kisame forces himself awake and bites off his own tongue so they can't get anymore information from him.
He bursts out of his restraints and creates a water prison around himself that prevented attack and then summons sharks within it. He then thinks about the first time that he met Itachi and the conversation they had, and then the sharks eat him alive so that they couldn't get information from him since Kisame knew that there was no way for him to escape. After his death, Guy decided to see what information Kisame collected on the alliance, but the scroll was booby trapped with a seal that trapped each of the Ninjas in a Water Prison. The booby trap also released a shark that they had to fight off and one messenger shark equipped with the scroll. While the group fought the sharks, the messenger shark escaped to the ocean with the scroll.
Kisame Hoshikage is also known as the Monster of the Hidden Mist. He is 32 years old, born on March 18. His horoscope is a Pisces, he has dark blue hair, his eyes are white, and he stands at 6'4". His status is a Jonin. He is an S-Class criminal, and a deadly rogue ninja from the Akatsuki. Even though Kisame can be quite violent and sadistic, he claims to be Akatsuki's specialist in capturing people alive.''
"Water Shark Missile" where he creates a powerful jet of water shaped like a shark.
"Giant Water Shark Missile" where he creates a massive shark composed out of water to attack the opponent, this also absorbs all ninjutsu it clashes against which makes it more powerful.
"Water Clone" where he creates a copy of himself out of water.
"Water Prison" where he traps the opponent in a large ball of water.
"Water Prison Shark Dance" where he traps the opponent in a gigantic dome of water centered around himself.
"Exploding Water Shockwave" where he spits a massive amount of water that creates crashing tidal waves.
"Great Exploding Water Shockwave" a larger variant of Exploding Water Shockwave.
"Five Sharks Eating" where he creates 5 sharks out of water to attack his opponents under water.
"Hundred Sharks Eating" like Five Sharks Eating but on a mass scale.
"Underwater Motion" allows him to propel himself through water.
"Shark Summoning" lets Kisame summon sharks that obey his commands.
Kisame wields the giant sword Samehada (lit. Shark Skin), It is a giant sword covered in bandages. Underneath the bandages Shamehada is covered in spikes. It is unique among swords in the fact that it doesn't cut or slice it's victims, it rather shaves them to death. The sword is apparently sentient as it has a mind of it's own and only lets someone he deems worthy wield it.The sword is capable of absorbing Chakra and transferring it to the wielder, thereby rejuvenating their strengths. It has recently been revealed that Shamehada has the ability to merge with the user, producing a shark-human hybrid. In this form Kisame can breathe and move very quickly underwater, it also gives him the ability to sense chakra. Samehada's spikes can also extend from Kisame's fins to attack the opponent. It also seems to change owners depending on how much it likes their chakra which is seen in the battle between Killer bee and Kisame. It liked Killer Bee's chakra more and helped him recover when Kisame was about to win. It has also shown to be able to hold or hide things inside its mouth also seen when Kisame is trying to infiltrate Killer Bee's villiage. The hilt can stretch and allows the sword to be used like a flail. It also can move on its own if there is nobody to control it.