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Occult
Real Name: Peter Quinn
Former Aliases: Peeper
Group Affiliation: Resistants, formerly Mutant Force
Major Enemies: USAgent, formerly X-Men
Peter Quinn was discovered and recruited by Magneto as one of his Mutant Force lackeys and took the code-name Peeper. He remained with the Mutant Force throughout its various incarnations. In their latest incarnation, where they changed the name of the team to the Resistants, he changed his codename to Occult. The team's protest against the United States' Mutant Registration Act was cut short by the clash with USAgent, who was then known as Captain America. Presumably, Occult remains in federal custody. Occult's mutant nature, aside from his physical deformity of an abnormally large head and eyes for his proportionately small body, include the abilites of telescopic vision and a plasma eye-blast.
Ogun
Real Name: Ogun (presumed)
First Appearance: Kitty Pryde and Wolverine #2
Major Enemies: Wolverine, Shadowcat
Ogun was once Wolverine's sensei, or trainer, in the martial arts. At the request of Lord Shingen, Ogun captured Kitty Pryde and hypnotised her. Training her in the martial arts, he sent her to kill Wolverine but when she attempted to do so the shock snapped her out of Ogun's spell. Wolverine ended up confronting his former teacher and slew him. Much later, Ogun returned in spirit form to haunt Wolverine. Wolverine sliced Ogun's demon mask in two, and banished his spirit. Somehow, Ogun's spirit returned to plague Wolverine once more, but fled by possessing the body of Lady Deathstrike. Recently, Ogun infiltrated the computers of the S.H.I.E.L.D. Helicarrier and lured Kitty Pryde onboard in an attempt to make her his slave for eternity. Kitty fought Ogun on a higher plane and defeated him, making him realise what he once was.
Omega Red
Real Name: Arkady Rossovich
First Appearance: X-Men #4
Group Affiliation: None, former agent of Matsu'o, former KGB agent
Major Enemies: Wolverine, Maverick, Sabretooth, Banshee, X-Men
Powers: Release of death pheromones
Omega Red is possessed of tentacles made of carbonadium, which channel his power to release pheromones into the air that cause death. He requires the useage of a device known as the C-Synthesizer to stabilise his powers. He is an old enemy of the Weapon X team (Wolverine, Maverick, and Sabretooth) who he encountered many years ago in Berlin when they were sent to retrieve the C-Synthesizer. After being apparently killed by Wolverine, he was resurrected many years later by Matsu'o of the Hand who sought to use Omega Red against Wolverine and gain the C-Synthesizer for himself, but his plan failed as Omega Red was defeated by the X-Men. Omega Red also shares a past with Banshee, having been a serial killer (prior to his becoming Omega Red) that Banshee was assigned to capture by Interpol.
Onslaught
First Appearance: Uncanny X-Men #322 (name only), X-Man #15 (in shadows), X-Men #54 (fully)
Last Appearance: Onslaught: Marvel Universe
Cause of Death: Destroyed by the combined efforts of the X-Men, Avengers, and Fantastic Four
Major Enemies: X-Men, X-Man, Avengers, Fantastic Four
Powers: Psionic
Onslaught was an amalgam of Charles Xavier and Magneto. First manifested when Xavier mindwiped Magneto, Onslaught lay dormant as a psionic entity within Xavier until all of Xavier's suppressed rage and anguish released him. Mutating into a separate entity, Onslaught captured both X-Man and Franklin Richards and absorbed both their vast powers to add to his own already awesome psionic strength. It took the combined efforts of the X-Men, the Avengers, and the Fantastic Four were required to stop Onslaught from reshaping reality into his own twisted version. The Avengers and Fantastic Four seemingly perished in the effort, although they were successful in destroying Onslaught. Recently, Charles Xavier has been arrested for crimes committed as Onslaught, and is currently being held captive within an Operation Zero Tolerance (see Bastion) facility.
Orphan-Maker
Real Name: Peter (full name unrevealed)
First Appearance: X-Factor #40
Known Allies: Nanny
Major Enemies: X-Factor, Generation X
The boy who would come to be called the Orphan-Maker was rescued by Nanny after his captor, Mr. Sinister, decided that his powers were too uncontrollable for him to live. His exact mutant powers are unknown and are repressed by the suit of armour he wears which was designed by Nanny. He has joined Nanny in her quest to prevent the exploitation of young mutants by kidnapping them and killing their parents. He was last seen attempting to kidnap a young deformed boy wrongfully thought to be a mutant, but was stopped by Generation X.
Ox
Real Name: Unrevealed
First Appearance: Alpha Flight #64 (cameo), Alpha Flight #69 (fully)
Group Affiliation: China Force
Ox is a member of China Force, China's officially-sanctioned team of superheroes.