Place of Birth
Somewhere in Scotland
Lord Alasdhair Kinross (maternal ancestor); Queen Elizabeth II (maternal distant relative); Lord Kinross (maternal grandfather, deceased); Dr. Moira MacTaggert (mother, deceased); Joseph MacTaggert (father, deceased); Rahne Sinclair (Wolfsbane) (foster sister); unnamed foster nephew;
No hair, (formerly blond)
Generate enormous amounts of physic force from his energy state that allows him to restructure reality in any manner, exists as an energy form that can inhabit human bodies to contain vast energies. He can possess several bodies at one time. He is invisible to telepathic scans and most detection devices. Kevin can also shift between realities. Kevin's only known weaknesses are metal, and his need for fresh host bodies.
Kevin MacTaggert is the son of mutant expert Moira MacTaggert, and politician Joe MacTaggert. The boy was a mutant with the ability to warp realities. These powers burn out his body, leaving him in need of new host bodies to sustain himself. Due to the unstable nature of his powers, Moira confined Kevin to a maximum security cell inside her mutant research facility located on Muir Island. (To learn about the above highlighted character and/or place, just click on their names.)
During a battle between Magneto and the X-Men, the Muir Island's security was compromised and Kevin's cell was damaged. This caused what remained of his body to burn out and required him to look for a new host. When a man came to destroy Moira's laboratory, Kevin possessed him and hid until he could escape the island. However, he ended up battling the X-Men members Phoenix, Multiple Man, and Polaris. Although he defeated Polaris and the Multiple Man quite easily, the Phoenix nearly killed him. But, Kevin was able to escape the island in a duplicate body of Multiple Man and began a quest to find and possess his father's body. (Click on the highlighted names above to learn about the different characters. Note: Beware of the revealing outfit on Phoenix's bio page.)
Along the way Kevin encountered the X-Men, who were hot on his trail. Using only a fraction of his mutant powers, Proteus was able to easily defeat Storm, Wolverine, and Nightcrawler. As the continued his journey, he eventually made it to Edinburgh and took over his father's body. While possessing his fathers body, he battled the X-men (now calling himself Proteus). However, his powers soon burned out his fathers body, destroying it. However, before he could possess another body, Proteus was punched by Colossus who's metal body disrupted his psionic energies and effectively killed him, or so they thought. In reality, Proteus' energies were disrupted and scattered all over Scotland. (To learn about the characters above, just click on their names. Note: Beware of the extremely revealing outfits on Storm's bio page--block images if you can.)
Sometime later, a woman named Erika Benson (aka Harness) was hired by Advanced Idea Mechanics (A.I.M.) to use her son, Gilbert Benson (aka Piecemeal), to collect the energies of Proteus for their own use. Gilbert had the ability to absorb the energies that were once Proteus, and his mother intended to collect it all. However, her mission was almost thwarted by the New Mutants, New Warriors, as well as Moira MacTaggert and a number of her mutants from Muir Island. But, their intervention failed, and Gilbert's body exploded, resulting in a fusion entity of both Gilbert Benson and Kevin MacTaggert. (Click on the highlighted names above to learn more about the teams and/or character. Note: Beware of the revealing outfits worn by some on the New Warrior's bio page.)
This new (merged) Proteus used his powers to reshape Edinburgh, Scotland to his own whim. The X-Factor was there to battle him, but the group of heroes questioned the ethics of killing Proteus or trying to help them. In the end, Proteus realized that reality was not compatible with him and he "killed" himself. (Click on the highlighted name above to learn more about X-Factor.)
Later, during the events of M-Day, Proteus was resurrected. Now known as "Mutant X," he went on search for the perfect host body. He even began hopping from dimension to dimension searching for a body that would not burn out. All this time, the Exiles where close behind, trying to stop him. In the process of searching for the perfect host body, Proteus burned out (killed) many people, including Mimic. After killing Mimic, he possessed Morph. He learned that Morph could withstand his psionic energies indefinitely--he found his perfect host. It was at this point, Proteus began to formulate how to rule every dimension. Meanwhile, the Exiles devised a plan to subdue Proteus and attempt to bring back Morph. The Exiles were able to brainwash Proteus into thinking he was actually Morph, and for several missions they had him convinced that they defeated Proteus. The Exiles figured this was a good way to keep an eye on Proteus. However, eventually, Morph's real persona re-appeared and took control of his own body again. Closing Proteus in a small part of himself, but agreeing to "live together" inside him. (Click on the highlighted names above to learn more about the characters and/or team. Note: Beware of the revealing outfits of some on the M-Day's bio page, and the very skin-tight outfits on the Exiles' bio page.)
Later on, when Selene resurrected Destiny, Proteus some how appeared inside her. Destiny tried to communicate with her foster-daughter Rogue, but some how she got Blindfold instead. Proteus quickly possessed Blindfold and tricked her into convincing a bunch of gathering X-Men (Rogue, Trance, Psylocke, Husk, Colossus, Magneto, and Nightcrawler) to go to Muir Island. There Proteus revealed himself to them and was able to defeat them quite easily. Proteus had gained a new ability where he could possess more than one person--he possessed Trance, Psylocke, Nightcrawler, Destiny, and Husk. While possessing the group, he forced them to fight Rogue and Magneto. However, a weakened Magneto used the last bit of his strength to launch himself and Proteus into the upper atmosphere. Magneto determined that he could affect Proteus' energies, disrupted them, and made Proteus disappear. (To learn about the above highlighted characters, just click on their names. Note: Beware of the revealing outfit on Husk's bio page.)
More recently, Magneto confirmed that Proteus is most likely not dead, but that his energies are merely dispersed, saying that he will be able to reintegrate himself one day. But, Magneto hopes that he spread Proteus thin enough to prevent, or at least postpone, his return for a long period of time.
There is nothing there, but here is the link to Proteus' bio page on Marvel.com, http://marvel.com/universe/Proteus_%28Kevin_MacTaggert%29.
In the film X2, "McTaggart, Kevin" and "Kevin McTaggart" appear on a list and a folder on William Stryker's computer files. (His name is listed on the very top of the list on the second picture posted above.)