In the blue corner we have
He wields Zabuza Momochi's zanbatō
He's a member of Hebi
He is very confident in his abilities
Karin despises his liquid ass
And we all know he loves his water
A former experimental subject of Orochimaru. Suigetsu Trained to be one of the Seven Swordsmen of the Mist, and as such has a number of traits consistent with other known members. In addition to having shark-like teeth, Kisame Hoshigaki claims Suigetsu is a prodigy at the art of murder, as he has a habit of chopping off his victim's limbs before beheading them. He is also very confident in his abilities, since he has threatened Sasuke Uchiha on more than one occasion.
he carries Zabuza Momochi's zanbatō and can wield the weapon with relative ease, but traveling longer distances with the sword strapped onto his back tires him out rather quickly. In his allegiance with Sasuke, Suigetsu hopes to acquire the sword of Kisame as well, which Karin assumes to mean that he wants to collect all of the swords of the Seven Swordsmen.
Suigetsu is able to reduce himself to liquid form and return to bodily form at will. This ability also allows him to change his body shape, giving him the ability to increase the size of his limbs, proportionally increasing his strength, if necessary. It also makes striking him somewhat difficult; since he is made of liquid, any sufficiently powerful strike will go right through his watery form. Suigetsu carries water bottles on his outfit. Given his somewhat frequent desire to consume water, Suigetsu may require regular hydration to sustain his watery form.
In the red corner we have
He wields a scale-covered weapons called Samehada
He's an Akatsuki member
He's partnered with the ever so famous Itachi Uchiha
with pale blue skin and sharp triangular teeth
Non other than the "demon shark".
the Land of Water, seeks him out for plotting to overthrow its government and being involved in numerous assassinations. When he was still loyal to Kirigakure, he was one of the Seven Swordsmen of the Mist, a group of ninja that wield particularly large weapons in battle. Kisame's weapon is called Samehada, a scale-covered sword that shaves off skin instead of cutting and is capable of absorbing untold amounts of chakra. Samehada only allows Kisame to wield it; if anyone else tries to pick it up, spikes protrude from its handle and it returns to Kisame's side. Like other characters who have trained to be one of the Seven Swordsmen, Kisame enjoys mutilating his opponents, as seen when he suggests cutting off Naruto Uzumaki's legs to make him easier to carry.
Kisame has a distinctive shark-like appearance, complete with pale blue skin, small white eyes, gill-like facial structures, and sharp triangular teeth. Even his name, Kisame, means "demon shark". His shark-like qualities carry over to the type of techniques he uses in battle, as he often shapes bodies of water into the forms of sharks that proceed to attack opponents.If there is no water source where he happens to be fighting, Kisame can use Water Release: Exploding Water Shockwave to create a lake's worth of water to be used for attacks. Kisame is also noted to have a particularly large reserve of chakra; even when he fights at 30% power in one instance his chakra supply is compared to that of a Nine-Tailed Demon Fox-enhanced Naruto Uzumaki.