James 'Logan' Howlett/Wolverine
Piotr Nikolaievitch "Peter" Rasputin/Colossus
Piotr is a gigantic man able to transform his body into living, armored metal. He's a shy, sensitive, and honorable character who can be a bit naive. He's reluctant to use his powers to hurt anyone and only resorts to them when there's no other option. He's also a very talented artist. In the regular universe, he's usually involved with Kitty Pryde, although there was a lot of angst about it since she was
technically under age 14-15 years old in the Claremont-era issues. In the Ultimate Universe, Colossus is gay and is involved with Northstar, but retains most other character traits. Usually finds himself paired up with Wolverine during fights. He's also the great-grandson of that Rasputin. During Fear Itself, he became The Juggernaut, which made him stay with Cyclops during the X-Men's schism. This resulted in his being possessed by the Phoenix.
A detective and heir to a castle and fortune in County Mayo, Sean Cassidy was a former Interpol inspector with flight and sound manipulation abilities. After his wife died in a terrorist bombing, he blamed his cousin, causing him to run off with his daughter and driving a rift between the two. He was mind-controlled by an alien terrorist group but freed by the X-Men. Later, he joins the X-Men when the original five are kidnapped. Being about 10-15 years older than the rest of the recruits, he was only active for a short amount of time but still hung around as a reserve and as a mentor, who applied his experience in espionage and anti-terrorism to the younger members of the group. Deceased in 2005, he was briefly resurrected in 2013 and became a Horseman of Apocalypse.
- Berserk Button: Don't hurt Moira. As Guardian found out, even if it's an accident, Banshee will try to kill you.
- Bound and Gagged: A few times, due to his vocal abilities.
- Cain and Abel: With Black Tom Cassidy, his cousin (or brother, in some continuities).
- Captain Ethnic: Wears green, ginger hair, 'faith 'n begorrah'.
- Depower: Went a long time without his powers after saving Japan from an earthquake machine.
- Depending on the Artist: Even in comparison to other X-Men of his generation. He went from ugly in the Sixties to handsome in the 70s, his hair inexplicably changes colour in the 80s (he started out blond) and he started looking younger in Generation X in the 90s.
- Disappeared Dad: For his daughter, Theresa Cassidy, though in all fairness to Sean, he didn't know she was alive, or that his wife had even been pregnant in the first place, and his cousin made sure he remained unaware.
- Distinguished Gentleman's Pipe: Sean smokes a pipe when he's relaxing. Although he seemed to have given up by the time he became a teacher.
- Dropped a Bridge on Him: Or rather, a 747.
- Handicapped Badass: Sean for a time in the early 90's courtesy of a broken jaw preventing him from using his powers.
- Heterosexual Life-Partners: With Forge. They're practically brothers.
- I Believe I Can Fly: Attempted to explain as him riding on soundwaves. No, just... no.
Wolverine: Next time, why don't we try sneaking in with a marching band?Banshee: If you think that's bad, you should hear me sing...
- It came with a Funny Moment in the TV series, when he gave Wolverine a ride, Wolverine covering his ears for the whole journey.
- I Choose to Stay: After the Proteus saga, Sean stayed behind on Muir Island while the rest of the X-Men went back to America, partly because without his powers Sean wasn't much use to the team, and also because of Moira.
- Love at First Sight: Fittingly, when he first saw Moira, he was rendered speechless.
- Make Me Wanna Shout: His power allows him to use sonic waves to both attack and to fly.
- No-Sell: As with Cyclops and Havok, Sean and Tom's powers don't effect the other, so their fights usually revolve around them fighting the old fashioned way.
- Officer O'Hara: Before becoming a superhero, he was an NYPD cop.
- Oireland: There's stereotypically Irish, and then there's literally owning a castle full of leprechauns.
- Older and Wiser: Than the rest of the All-New X-Men, save Logan.
- Progressively Prettier: In his first few appearances, he was uncomfortably close to the 19th century "Irish neanderthal" stereotype. When he joined the X-Men, he was intentionally redesigned to appear more handsome.
- Retired Badass: Quit active heroics to teach the younger students.
Sunfire got his powers from his mother being poisoned by the radiation from the bomb dropped on Hiroshima. He vowed to use his radiation powers to fight a one-man war of revenge on the U.S., with the help of his Manipulative Bastard uncle Tomo. After his uncle revealed his true colors by murdering Sunfire's father, he surrendered himself to authorities. He was invited to a new version of the X-Men, but only agreed to be on reserve status, because his temper and radiation powers combined means he doesn't play well with others.
- Anti-Hero: Shiro is rude, belligerent, more than a little racist... but he also loves his country and will do anything to defend it.
- The Atoner: Not that it stops him from generally being a dick.
- Captain Ethnic: He's from the Land of the Rising Sun, his codename is Sunfire, and his powers are basically solar radiation.
- FaceHeel Turn: After House of M, he became a horseman of Apocalypse (not willingly), but after he broke off the brainwashing, he willingly served Sinister for a time.
- Handicapped Badass: His legs are now cybernetic due to Lady Deathstrike cutting them off.
- HeelFace Revolving Door: At first Shiro was shortly presented as antagonist then became reserved member of the X-Men and Japan's beloved hero then joined Mr. Sinister's Marauders and finally became an Avenger.
- Heroic Sacrifice: Attempted twice in Uncanny Avengers. Not only Shiro survived both attempts, he actually got some Power-Up after the second one.
- Jerkass: Like Quicksilver, he's sometimes a good guy, sometimes a bad guy, often straddles the two lines and jumps between them even more often at times. The one thing that you can count on is for him to be unbelievably rude, obstinate, and just plain obnoxious; regardless of the side that he takes, he's invariably going to be that one guy that no one on the team likes.
- My God, What Have I Done?: After he finds out what his uncle did...
- No Good Deed Goes Unpunished: When abducted by Apocalypse, Shiro chose to crawl through his base and try to rescue Gazer, another mutant Apocalypse had abducted. Unfortunately by the time Shiro got there Gazer's brainwashing had already sunk it, and Shiro was subsequently brainwashed himself for his troubles.
- Playing with Fire: His solar-powered energy blasts are extremely hot.
- Politically Incorrect Hero: He's incredibly racist. In the 70s, he was also sexist on top of that.
- Wreathed in Flames: His appearance from Decimation onward had Shiro looking like his Age of Apocalypse counterpart, though with the slight difference of still having his skin.
Thunderbird I/John Proudstar
An Apache Indian and Vietnam veteran with the mutant abilities of superspeed, strength, and invulnerability - and super-tracking which was basically a standard requirement for all Native American superheroes throughout the 20th century. He joined the X-Men solely for excitement and glory, despite resenting "the White Man". He died in vain, and acted against orders - trying to keep a minor supervillain from getting away, causing a plane crash that he did not survive. His younger brother, James Proudstar (Warpath), would eventually become a member of the X-Men and X-Force.
- Anti-Hero: The major factor leading to his character's death. Claremont wanted to kill off one of the characters early in his run (for the shock value, apparently), and Thunderbird was chosen because, as Claremont put it "everything he had, Wolverine had too, plus claws."
- Does This Remind You of Anything?: The Classic X-Men reprint series included a new backup story in which the X-Men react to his death, and while the word "suicide" is never used it's clear that they think it was exactly that. Storm and Nightcrawler remember times when he seemed obviously troubled and wish they had reached out to him, Banshee wonders "what demons drove [him] to such a mad decision", and Wolverine concludes that he "checked out" because of something that happened to him while he was a Marine.
- Dramatic Irony: A flashback had Logan ruminating that John would likely last the longest of all the new X-Men.
- Famous Last Words: "I'm a man, a warrior of the Apache, and today, I'm going to prove it!"
- Ineffectual Loner: Not to mention a total dick.
- Jerkass: Like Sunfire, he was rude as hell, completely unwilling to work with others, and just generally not a pleasant person.
- Jerk Justifications: An issue of Classic X-Men suggested Thunderbird was initially genuinely interested in becoming an X-Men, and on his first night Iceman attacked him in a fit of childishness, bringing John back to square one.
- Leeroy Jenkins: Basically, if he hadn't been an impetuous moron, he'd probably still be alive today. He was, however, and his decision to jump onto a moving jet to stop a villain from escaping wound up being the bit of blind idiocy that killed him.
- Lightning Bruiser: Superhumanly strong and quite fast as well.
- The Nicknamer: Tended to refer to Cyclops as "One-Eye".
- Not So Invincible After All: Dies on his second mission, having been previously thought of as effectively invulnerable.
- Positive Discrimination: Notably averted; apart from having a terrific set of Combo Platter Powers, he was a stone cold Jerkass who meshed poorly with the rest of the team, and paid dearly for it.
- Proud Warrior Race Guy: His sole driving motivation with the team was to prove the Apache were still a strong people.
- Sacrificial Lamb: Killed off in his third appearance.
- Senseless Sacrifice: The supervillain whose jet he was killed bringing down? Still around today, and way more powerful than he was back then.
- Shell-Shocked Veteran: Classic X-Men revealed that he had lied about his age to join the Marines, and returned home from war with some major issues as a result. It's strongly implied that his [PTSD] was a factor in the recklessness that got him killed.