First appearance: Uncanny X-Men #1

The founder of the X-Men, Xavier's dream is of peaceful co-existance between mutants and humans. Xavier is the most powerful telepath on the face of the Earth, rivalled only by Phoenix and the X-Man. He is currently in outer space with a group of young mutant Skrulls. His codename is Prof. X.

First appearance: Uncanny X-Men Annual #17

FBI Agent Carl Denti tracks down mutants who are responsible for the deaths of innocents or humans. He once targeted Skin whom he thought had murdered Angelo Espinosa, not knowing that they were one person. Skin undermined Denti's belief in himself and was able to outsmart him. Recently a new X-Cutioner has appeared, his true identity is unknown. The X-Cutioner uses sophisticated technology and armour in his quest for 'justice'.

X-Force represent the second generation of mutants. While X-Force have never appeared in Generation X they used to be the teen X-Men team under the name the New Mutants. However, under Cable's tutelage they outgrew that title. Theresa Rourke (aka Siryn), the daughter of Banshee, is a former member and deputy leader of the team. Samuel Guthrie (aka Cannonball), brother of Husk, is a current member of the team.

Current members: Jesse Bedlam, Cannonball, Meltdown, James Proudstar.

First appearance: X-Man #1

Nate Grey (aka X-Man) is from the Age of Apocalypse reality. In that reality Xavier had died before he formed the X-Men, Apocalypse ruled the Earth and Magneto formed his own band of X-Men to battle him. Nate is the result of Sinister combining that reality's Jean Grey's DNA with that of Cyclop's. Nate was transported to this reality when he stabbed Holocaust (one of the 4 Horsemen of Apocalpyse) with a shard of the M'Kraan crystal. Recently the X-Man has re-defined himself as a telepathic shaman, living outside of society and protecting it. He appeared in GenX when they were attacked by Gene Nation. Nate is probably the most powerful psionic being on the face of the Earth, he possesses vast telekinetic and telepathic powers rivalling, and possibly surpassing, those of Phoenix and Prof. X.