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Ka-Zar
Real Name: Lord Kevin Plunder
Known Relatives: Shanna Plunder (wife), Matthew Plunder (son), Parnival Plunder (brother)
First Appearance: Uncanny X-Men #10
Allies: X-Men, Spider-Man
Major Enemies: Parnival Plunder, Gregor, Savage Land Mutates, Sauron, Garokk
Young Kevin Plunder's father led an exhibition to Antarctica for a rare element when they found the jungles of the Savage Land where this element, dubbed Anti-Metal (later known as Vibranium), was found. When ruthless agents tried to steal Lord Plunder's Vibranium, he separated his two children and left for refuge in the Savage Land with his eldest, Kevin, leaving Parnival in the care of the family butler back in New York. Lord Plunder was killed by natives of the Man-Ape tribe, although Kevin was saved by the sudden appearance of a saber-tooth tiger later to be called Zabu. Zabu took Kevin with him into the Land of Mists, and the Man-Apes called him Ka-Zar, which means "Son of the Tiger". Ka-Zar grew up in the Land of Mists alongside Zabu, who taught him how to survive in the Savage Land. Meanwhile, the now-adult Parnival had managed to create a vast corporate empire, and, calling himself "The Plunderer" travelled to the Savage Land where he fought Ka-Zar for his half of their father's medallion, which would serve as a catalyst to activate the Vibranium's properties of melting other metals in the area. Ka-Zar defeated Parnival, but his brother would return to plague him many times until a fateful encounter in Antarctica when Parnival was trapped beneath an ice floe and believed dead. Ka-Zar eventually regained his knowledge of his British upbringing, and later met and married Shanna O'Hara. Ka-Zar and Shanna only left the Savage Land for a brief time when the giant alien Terminus succeeded in destroying the Savage Land, being rescued by the Avengers. They wandered the world for a time, but later found the Savage Land regenerating itself and returned. They were on hand to aid such allies as the X-Men against Terminus, and the Sub-Mariner against various corporations who wanted to excavate the Savage Land's resources. Ka-Zar and Shanna have a son together, whom they named Matthew. It has since been revealed that it was not Parnival that drowned beneath the ice floe, but one of his lackeys, and "The Plunderer" has returned to plague Ka-Zar once more.
Kamikaze
Real Name: Unrevealed
First Appearance: New Mutants #93
Last Appearance: X-Factor #85
Cause of Death: Slain by Archangel
Group Affiliation: Mutant Liberation Front
Kamikaze was a member of Stryfe's Mutant Liberation Front, until the X-Cutioner's Song, when he was killed by Archangel's wings (which acted automatically) during an encounter with the X-Men.
Kane
Real Name: Garrison Kane
Former Aliases: Weapon X
First Appearance: X-Force #2
Group Affiliation: Formerly Weapon Prime, Six Pack
Allies: Copycat
Major Enemies: Deadpool
Garrison Kane is another product of the Weapon X facility that spawned Wolverine, Sabretooth, and Deadpool. After the break-up of Cable's Six Pack, Kane was rescued by the Weapon X program and turned into a cyborg. Sent to track down Cable, he ended up with the Weapon Prime team and then, after the break up of that, ended up going to Cable's future. On his return he hooked up with Copycat, and the two have been trying to live a normal life since.
Karima
Real Name: Karima (full name unrevealed)
First Appearance: X-Men Unlimited #7
Major Enemies: Candra
Known Allies: Storm
A young street thief in Cairo, Karima was one of the thieves under the tutelage of Achmed El-Gibar, Storm's old teacher. She is a powerful mutant capable of giving both form and function to fears and desires pulled from the minds of others. El-Gibar knew that Candra sought to capture her, and he warned Karima of this. Karima created Jamil, a young thief who was actually her own desire for companionship given form. Candra was fooled into believing that Jamil was the one she sought. Candra left with Jamil, and after El-Gibar died Karima became leader of the thieves. Candra returned later to reclaim a jewel she called her heart, which was stolen from her years earlier by Storm when she was a young thief. She confronted Storm for the heart when Jamil was apparently taken over by the Shadow King. It was actually Karima projecting Storm's fears onto her creation Jamil. Storm discovered Karima's secret, and Candra was defeated after her heart was destroyed by Cyclops.
Karma
Real Name: Xi'an Coy Manh
First Appearance: Marvel Team-Up #100
Known Relatives: Parents (names unrevealed, deceased), Nguyen Ngoc Coy (uncle, deceased), Leong Coy Manh (brother), Tran Coy Manh (brother, deceased), Nga Coy Manh (sister)
Group Affiliation: Formerly New Mutants
Powers: Mental Possession
Xi'an and her twin brother Tran were both born mutants sometime during the Vietnamese war and their family was forced to flee when South Vietnam fell to Communist rule. Tran was the only one rescued, however, and Xi'an was forced to use her powers to save her family and help them escape. Unfortunately, she was unable to save them from the Thai pirates that attacked and ravaged the ship, and her mother died when finally a US Navy ship came to their rescue. Xi'an was reunited with her father and brother in America, when she learned that her father had become a successful crime lord. She refused to join him, however, and he kidnapped Xi'an's younger siblings to force Xi'an to his service. Xi'an instead used her powers to possess Spider-Man and to use him in saving her little brother and sister, but Spider-Man and the Fantastic Four confronted her. They agreed to help but were instead turned upon each other when Tran used his powers to force the Fantastic Four to attack Spider-Man. In order to save Spider-Man, Xi'an had to kill her brother by absorbing his life essence into herself. She was soon afterwards reunited with her little brother and sister. Xi'an, now known as Karma, was soon approached by Charles Xavier, who wanted Karma to be the first member and leader of his New Mutants, while learning to better control her powers. She agreed, and remained with the team until a battle with the Viper when Karma was separated from the rest of the team, who thought her to be drowned. Actually, she was used by the criminal Amahl Farouk (now known as the Shadow King) who possessed her body much like she did others. Farouk used his and Karma's own powers to carve a criminal empire, and he indulged his appetites to cause Karma to become obese. The New Mutants came to his attention when Sunspot and Magma were captured to become gladiators in Farouk's arena game. The rest of the team freed their friends and learned of Karma's predicament, although Farouk escaped and soon enslaved the New Mutants and the X-Man Storm. Eventually, his control was loosened, and Farouk and Karma fought a psychic battle, which she won, forcing Farouk to flee back to the astral plane. Very shortly afterwards, the New Mutants, Storm, and Karma were kidnapped to Asgard and ultimately seperated in both space and time. The rest of her team found Karma after she lived months in the past, shedding her considerable girth. Karma served with the team for another period of time, until she learned of the disappearance of her younger brother and sister, when she left to find them, winding up in San Fransciso and Madripoor, where she stayed with her uncle Coy until she was kidnapped as part of the Younghunt. She was rescued by X-Force, and resumed her quest for her siblings. With the aid of Cannonball and the Beast, she rescued Leong and Nga from the clutches of Spiral and the Viper, atlhough they had been genetically altered by Spiral's Body Shop.
Katu
Real Name: Katu (full name unrevealed)
First Appearance: Uncanny X-Men #300
Last Appearance: Cable #11
Cause of Death: Slain whilst trying to stop Omega Red
Group Affiliation: Acolytes
Katu was a member of the Acolytes, and possessed the power to act as a conduit for atmospheric wavelengths as well as being able to manipulate electromagnetic energy. He was originally discovered by the Russian military, who sent Omega Red after him. Losing his arm to Omega Red, Katu swore revenge against him. When the Acolytes teamed with Cable to stop Omega Red, Katu turned his power inward and both he and Omega Red were seemingly killed. Omega Red has since returned, but Katu's whereabouts are unknown.
Killspree
Real Name: Unrevealed
First Appearance: X-Force #23
Group Affiliation: Weapon P.R.I.M.E.
Major Enemies: Northstar, Domino, Grizzly
Killspree is a member of the revamped Weapon P.R.I.M.E. unit. He was recruited to help track down X-Force. Killspree has two large razor-sharp blades on each forearm that he wields expertly in battle.
Kleinstock Brothers
Real Names: Harlan, Sven, and Eric Kleinstock
First Appearance: X-Men #1
Last Appearance: (Eric) Uncanny X-Men #299
Cause of Death: (Eric) Slain by Tom Corsi
Group Affiliation: Acolytes
The Kleinstock Brothers were original members of Magneto's Acolytes. When the Acolytes attacked a school in which there was a mutant child, Eric Kleinstock was shot and killed by Tom Corsi. Since the break-up of the Acolytes, the remaining Kleinstock Brothers' whereabouts are unknown. The two remaining Kleinstock Brothers have displayed the power of being able to merge into a single being, standing over 20 foot tall, with superhuman strength and endurance.
Krystalin
Real Name: Krystalin Oganda
First Appearance: X-Men 2099 #1
Known Relatives: Andre (father, deceased), Zak (brother)
Group Affiliation: X-Men 2099
Powers: Crystomorph
Krystalin is a member of the X-Men of the year 2099. Krystalin possesses the power to create objects made of a crystaline substance.
K'ylun
Real Name: Colin McKay
First Appearance: Excalibur #1
Group Affiliation: Formerly Excalibur
As a child, Colin McKay was persued by the woman crime lord known as the Vixen and chased into an abandoned construction project where he met the recently created Widget who saved him by transporting him to the alternate reality of Ee'rath. There, the natives saw Colin's arrival as a good omen, and he was trained by the finest warriors and wizards to fight the evil arch-mage Necrom. He grew into an adult and a great warrior, and was betrothed to his long-time love, the beautiful witch-queen Santeen. Unfortunately, in final battle with Necrom, the evil wizard slew his love just before he escaped to Earth's reality. K'ylun (the Ee'rathian translation of his name) followed his nemesis to Earth, arriving in Excalibur's bathroom only several months after his depature due to the relative nature of time to native realities. K'ylun joined Excalibur in fighting Necrom, who soon gained the abilities of the Anti-Phoenix in his bid to rule all the Omniverse. K'ylun remained with the team for several adventures following the defeat of Necrom, but shortly left them to rejoin his parents. Just before meeting his parents, K'ylun was attacked by the Warpie team, the Seraphim, and brought to the Cloud Nine research facility, where he found the rest of Excalibur experiencing similar circumstances. Together, they brought Nigel Smythe to justice, only to be contacted by the recently revived Rachel Summers as the Phoenix. K'ylun helped Excalibur in their time-travelling mission to rid Rachel Summer's alternate future of the Sentinels once and for all. Since then, he has been mentioned as having returned to his parents, although he was never actually seen taking leave of the team. K'ylun was an accomplished swordsman who also possessed the mutant power of being able to mimic any sound he heard. He used the unique twin swords of Zz'rath, which were powerful blades enchanted to cut through almost anything, save those who know themselves innocent.