Corporal Christopher Winter
Voiced by: Derek Phillips
- A Space Marine Is You: A given, as he's the Player Character in a game named Colonial Marines.
- Action Genre Hero Guy
- Animal Motif: He has a wolf painted onto his armor with "Big Bad" above it.
- Audience Surrogate: He often asks obvious questions, ostensibly for the audience's benefit. However, this is also lampshaded at a couple points when he asks Cruz what's happening, and the latter refuses to answer.
- Badass Normal: Despite being a standard U.S. Marine, he survives an increasingly-absurd number of situations, including a close encounter with a xeno in the bowels of the Sulaco, nearly getting sucked out of the umbilical when another Marine blows him up after a chestburster comes out, escaping from the hive underneath Hadley's Hope, and finally taking on the Alien Queen herself mano-a-mano.
- Bash Brothers: With O'Neal, who fights beside him for the majority of the campaign.
- Late to the Tragedy: At the beginning of the game, Winter is sent in alone to reinforce two other groups of Marines who had previously boarded the ship. When he arrives, he finds O'Neal struggling to save a fellow soldier who's bleeding out, carnage everywhere and the remnants of Ripley's fight with a Queen.
- Meaningful Name: Winter stays frosty under pressure.
- Military Maverick: Has shades of this. Winter does ignore direct orders from superiors in order to do what he feels is right on several occasions.
- No One Gets Left Behind: He, in addition to O'Neal, refuses to let Reid be impregnated by the xenomorphs, and rescues her as she's being dragged to the hive. He does the same thing later to rescue O'Neal.
- Screw the Rules, I'm Doing What's Right!: Tells Reid she can court martial them afterwards if she wants but they're going after O'Neal regardless of her outranking them.Winter: "No Marine left behind."
- Space Marine
- Unwitting Pawn: Cruz uses Winter and O'Neals desire to save Bella to send them after a manifest. The true goal all along being it reveals the location of the marine Wey-Yu forces have kidnapped and a means of getting off planet. The captain was well aware Bella couldn't be saved and was gambling their lives on a longshot.
Private Peter O'Neal
Voiced by: Travis Willingham
- Always Save the Girl: He doesn't succeed.
- Badass in Distress: Gets abducted by Xenomorphs which prompts Winter and Bella to ignore the fact Reid outranks them and go after him aginst her wishes.
- Badass Beard
- Badass Normal
- Bash Brothers: With Winter.
- Big Brother Instinct: Towards Bella and younger marines.
- The Big Guy: A big, tough Colonial Marine who wields the biggest weapon: a smart gun.
- Embarrassing Nickname: Winter takes to mockingly calling him "Nugget" after a throwaway comment by Cruz. O'Neal is not impressed.
- Space Marine
- Take My Hand: O'Neal manages to grab Winter's hand when the umbilical bridge between the Sulaco and Sephora is destroyed in the first mission.
- Unwitting Pawn: Along with Winter in their doomed attempt to save Bella. O'Neal quickly works out that rescuing the prisoner and finding an FTL ship were the only things Cruz was interested in.
Private Bella Clarison
Voiced by: Nisa Ward
- Action Girl
- Badass Normal
- Black Dude Dies First: She's black and the first main character to die.
- Chest Burster: She's infected with one. And it ends up killing her.
- Cruel and Unusual Death: Bella is eventually killed in typical gruesome fashion by the Chest Burster, despite the efforts to try and save her.
- Worse, O'neal could have spared her such a death with a mercy kill but was content to keep talking while it was bursting out of her body.
- Dead Woman Walking / Your Days Are Numbered: When we're introduced to her it's clear she's been infected with a chestburster and time is not on her side. Though initially denying that's there's any problem due to not knowing about what Aliens do, Bishop informs her she's going to die and might only have hours to live.
- Face Death with Dignity: Upon finding out that even if the monster within her is removed there would be no hope of survival, Bella gracefully accepts her fate and bravely endures the agony of its birth as she is promised the survival of her remaing comrades by O'Neal.
- Face Full of Alien Wing-Wong: Comes round to find herself choking on a dead facehugger.
- Fetus Terrible: She becomes increasingly fearful of the monster inside her, especially when she begins to feel it move.Bella: "I can...I can feel it moving..."
- Genre Blind: Wakes up gagging on a dead facehugger and believes she's fine. Though it's strongly implied to be denial due to fear than actually being that naive.
- Actually its neither, well maybe a bit of naive there but the marines do not have knowledge about the threat, its only weeks after Aliens and Xenomorphs are not public knowledge (at the time if one includes the comics) and while its possible the marines could have read Ripley's report, fact is, Bella may simply have not known at all what happened to her.
- Hope Spot: There's a slim chance they can save Bella from her fate. It turns out even removing a Chest Burster isn't enough, the damage to the hosts organs are fatal regardless.
- Military Maverick: More so than Winter. Not only does she ignore direct orders from a superior officer but later threatens said officer with a gun with no punishment. Of course Cruz knows shes already certain to die and needs her to help Winter and O'Neal on what amounts to a suicide mission.
- Space Marine
- Vasquez Always Dies
Captain Jeremy Cruz
Voiced by: Jason Douglas
- A Father to His Men: Even if his version is "The Needs of the Many Outweigh The Needs of the Few", he really does love the men and women under his command like one.
- Badass Normal
- The Chains of Commanding: There are several instances when he makes tough calls that do not sit well with his Marines and he freely admits they were not pleasant choices to make. But in the end many of his decisions are arguably the only reason any of them stand a chance of getting out alive.
- Good Is Not Nice
- Heroic Sacrifice: Cruz sacrifices himself at the end of the final mission to kill the Queen xenomorph that's attacking Winter in the cargo bay of Michael Weyland's personal ship.
- I Did What I Had to Do: His justification for misleading Winter and O'Neal about their chances for saving Bella. He also admitted it was a miracle they even succeeded in their true goal and he hadn't expected them to return at all. In the end he weighed the slim chance of saving dozens of his marines against the likely loss of two and decided it was worth the deception.
- It Has Been an Honor: Says this almost verbatim when the Sephora explodes.Cruz: "It's been an honor serving with you. God speed."
- The Leader
- Mission Control
- Real Men Love Jesus: "I wake up in the morning thanking baby Jesus for every day I'm in the corps."
- Reasonable Authority Figure: He quickly calms the situation between Bella and Reid whilst also telling Reid her call was the right one. Even if she was ignored. Furthermore when Winter and O'Neal ask to go on a dangerous mission with Bella in an attempt to remove her Chest Burster he allows it, on the condition they gain intel of military value on the way. Though this turns out to be subverted in that he knew Bella was doomed. Cruz was actually interested in acquiring Weyland-Yutani's prisoner and a way off the planet for his surviving Marines.
- Space Marine
Lieutenant Lisa Reid
Voiced by: Ashly Burch
- Ace Pilot: The fact she's able to get Winter and company onto the surface LV-426 in one piece takes some pretty nifty flying, some luck and a crash landing good enough not kill them all.
- Action Girl: Once she gets over her Heroic B.S.O.D., she becomes a capable shot with a gun and is much cooler under pressure.
- Badass Normal
- Badass in Distress: The Xenomorphs try to abduct her but fortunately Winter knows were they're headed and spares her Keyes and Bella's fate.
- The Chick
- Cool Shades
- Coming In Hot: When crash landing on LV-426.
- The Engineer: Manages to get communications up and running armed with nothing but her smarts.Reid: "Who's a badass?! I ran an illegal Comm Tower bypass with my bare hands!"
- What the Hell, Hero?: Bella calls Reid out on not wanting to risk going after O'Neal when he was the one who wanted to save her ass in the same scenario.
Voiced by: Matthew Mercer
- Badass in Distress: Found by Winter after he'd been captured by Xenomorphs and has to be cut free from the wall.
- Chest Burster: He's killed by one after completing his mission to retrieve the flight recorder. He does take it with him though.
- Dead Man Walking: Though he's unaware until the Chest Burster starts exploding out of him.
- Leeroy Jenkins: He is reckless and endangers everyone. It's not hard to imagine that this could be the reason he ended up captured in the first place.
- Nice Job Breaking It, Hero!: Didn't really do his fellow marines any favors by blowing up the umbilical bridge they were still crossing. Telling them to shoot him was a more logical solution. Somewhat understandable given the pain he was in at the time likely didn't allow much thinking on his part. He was also carrying the flight recorder that they went to so much trouble to get.
- Reckless Sidekick: Destroys an entire dropship with a grenade because there's a few Xenomorphs near it. Much to Winter's annoyance. However he goes one step further when blowing himself up to kill his chestburster, which proves even more disastrous for all involved.
- Senseless Sacrifice: Keyes going back for the flight recorder proved to be for nothing as he blew himself up whilst in possession of it.
- Screw the Rules, I'm Doing What's Right!: Ignores orders to abandon his mission to retrieve the Sulaco's flight recorder on the grounds he won't let allow his squadmate's deaths to have been for nothing. Winter agrees and tags along to aid him.
- He personally ends killing more marines, and even more indirectly, first he blew up a dropship ( a possible escape for survivors) and then there's the senseless sacrifice, noted above.
- Space Marine
- Taking You with Me: When a chestburster begins bursting out of him Keyes decides to blow himself up with a grenade. Unfortunately he's in the middle of crossing between the Sulaco and Sephora over an umbilical bridge, thus ends up killing a fellow marine and narrowly avoiding killing even more (including Winter) in the process.
- Team Killer: Not intentional on his part but he does kill one of his fellow marines and endangers the lives of several more.
Cpl. Dwayne Hicks
Voiced by: Michael Biehn
- Back from the Dead: Despite being presumed dead (and seen on-screen in a death pose in the third film), he is Not Quite Dead, and was replaced in his cryopod by a wounded crewman from the Legato in the 'Stasis Interrupted'' DLC.
- Badass Normal: Having been tortured for several months does nothing to slow him down, and he helps Winter and the others fend off the Queen at multiple points.
- Being Tortured Makes You Evil: Or at least a more ruthless person, especially regarding the people who tortured you.
- Deadpan Snarker: (after executing Michael Weyland, to Bishop) "I just killed your God."
- Heartbroken Badass: As shown in the Stasis Interrupted DLC and offhandedly referenced to O'Neal in the main game, Ripley's death has affected him, although he's had several months to come to terms with it.
- Loophole Abuse: "You didn't specify which direction to drive the APC in, sir."
- Military Maverick: It's even lampshaded by Captain Cruz.Cruz: "Looks like you'll fit right in, you insubordinate son of a bitch."
- Not Quite Dead
- Sole Survivor: As of the end of the game, he is the only survivor of the original mission to investigate LV-426.
- Spotting the Thread: The reason why he knew Michael Weyland was Actually a Doombot? Weyland never breathed.
- Took a Level in Jerkass: A few months being tortured by Wey-Yu mercs has left him a less kinder person than he was in the film.
- Walking Spoiler: Shows up two-thirds of the way through the game, and is the prisoner Winter and O'Neal are sent to rescue from Weyland-Yutani.