Characters: Metal Gear Solid: Peace Walker

This page lists characters who first appeared in Metal Gear Solid: Peace Walker.

For other characters in the franchise, see the Metal Gear character index at Characters.Metal Gear.

For the monsters that Big Boss fought on Isla Del Monstruo, see the character index at Characters.Monster Hunter.


Characters that debuted in Metal Gear Solid: Peace Walker:

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     Militaires Sans Frontičres 
Soldiers Without Borders, the private military Big Boss and Kaz Miller manage in the game.
  • Action Girl: All females on the Combat Unit.
  • Amazon Brigade: Extremely difficult but possible to make every single soldier in MSF female, excluding unique characters like Chico and Huey.
  • Animal Theme Naming: Every single member of MSF comes with an animal-themed codename.
  • Badass: Gameplay-wise, all MSF soldiers are identical to Big Boss.
  • Driven to Madness: Around 10 MSF soldiers were off-site during the MSF massacre. To honor the memory of their once great organization, they wandered the plains of Afghanistan and Central Africa for 9 solid years, never even taking off their uniforms, until MSF's successor came to save them. Needless to say, they were basically zombies by the time you can encounter them.
  • Large Ham: Big Boss's assistant, the Drill instructor.
  • Sleeping with the Boss: If you're an attractive woman working at Mother Base, chances are you've slept with Miller at least once.
  • Team Pet: Theirs is Nuke, a cat.
  • We Help the Helpless: The only reason Big Boss had them formed was to provide military assistance to countries that needed them.
  • Wild Teen Party: They have huge monthly parties in celebration of birthdays.
  • Your Cheating Heart: Swan, a female MSF soldier, was caught cheating on Armadillo with Miller.

     Paz Ortega Andrade/Pacifica Ocean 
"Peace!"
Voiced by: Nana Mizuki (JP), Tara Strong (EN)

A Costa Rican high school student that studied and cherished peace. She is an orphan who lost her mother and grandparents to war when she was very young. Along with Gálvez, she asks Militaires Sans Frontičres to drive the Peace Sentinel out of Costa Rica, and stayed in contact with Snake during the mission. She is taken to Mother Base after the events of Chapter 4. It turns out that she is actually an agent for a mysterious group called "Cipher" (actually the Patriots). She helped Gálvez escape seven times as a distraction while she modified Metal Gear ZEKE.
  • Alas, Poor Villain:
    • After Paz is defeated and is launched into the Caribbean Sea as a result of ZEKE's destruction, Snake's only response to Paz's last speech is a melancholical "Paz..." and a pitying sigh.
    • Even more so in Ground Zeroes; she was tortured by XOF and clearly regrets her actions in the previous game. Her Heroic Suicide only makes this worse.
  • Ambiguously Bi: One of the tapes reveals that she was positively captivated by Strangelove after the latter makes a clear attempt at seducing her (by sensually applying suntan lotion all over he body). Paz remarks that she enjoyed it and was "spellbound."
  • Badass: As a Cipher agent, she's apparently pretty damn good with a handgun, more impressively, she refuses to break under torture from Skullface in Ground Zeroes.
    • Hidden Badass: She guided Snake on his mission to destroy the Peace Citadel.
  • Back for the Dead: She shows up in Ground Zeroes just in time to die again. Ouch.
  • Bald Woman: As shown in her appearance in Ground Zeroes, her hair has been cropped short.
  • Becoming the Mask: As revealed in her diaries.
  • Bitch in Sheep's Clothing: She initially appears to be a sweet, peace-loving girl, to the extent that Snake largely agrees to partake in the mission to Costa Rica for her sake. Paz turns out to be an Ax-Crazy Manipulative Bitch. Don't take our word for it; just listen to her audio diary and you'll agree. Though, as stated above, she gets better through Becoming the Mask; not that it stops her from becoming the Final Boss.
    • It might serve more as a horrific statement of just how far Zero had fallen, over the previous decade. Her diaries make clear that she was far more terrified of him than of death, to the point of saying exactly that. Considering what happens to her in Ground Zeroes, her fear is well founded.
  • Break His Heart to Save Him: Paz initially acts cold towards Chico and later on calls him a coward and traitor when he is being forced to torture her. She reveals later on in her final message to Chico that she didn't mean any of it and was just trying to protect him from being used as leverage by Skull Face. The truth is she was really happy and grateful to Chico for not giving up on her and coming to rescue her.
  • Break the Cutie: To say Paz loses it is somewhat wrong - she lost it a long time ago.
  • Conveniently an Orphan: Pretty much the only aspect of her life that has anything in common between her true self and her alias.
  • Dark Action Girl: For the most part, until her growing affection for Big Boss ultimately prompts her Heel-Face Turn, as seen in Ground Zeroes.
  • Death Equals Redemption: Her final act in Ground Zeroes cements this.
  • Dead All Along: In Phantom Pain, Paz seemingly survives the events of Ground Zeroes. Finishing an optional side-quest reveals a Mind Screw scene where Paz pulls out a bomb in her body and blows up. This unlocks a cassette tape which explains that Paz did die at the end of Ground Zeroes and you were seeing a hallucination the whole time. And just to make things more confusing, the person who says this is Paz herself, which suggests the tape is a hallucination too!
  • Did They or Didn't They?: It's implied that she and Chico may have in Ground Zeroes. However, the circumstances around it are horrifying, to say the least.
  • Disney Villain Death: She's ejected out of ZEKE and plunges headfirst into the ocean at the end of Peace Walker.
  • Even Evil Has Standards: Although Paz ultimately went through with Zero's plan and attempt to launch a nuke at the East Coast, she implies in her diary tapes that, loyal to Cipher or not, even she felt that launching a nuke at the United States and framing MSF as an extremist cult was far too extreme.
  • Final Boss/True Final Boss: As the pilot of Metal Gear ZEKE.
  • Fate Worse Than Death: Pacifica Ocean implies that she'd suffer this should she either fail or disobey her mission at the hands of her boss, Zero.
  • Femme Fatale
  • He's Just Hiding: In-Universe, Snake speculates that Paz had a chance of surviving the battle, as she was still wearing the SCUBA equipment and she landed in the Ocean. He is proven right in Ground Zeroes.
  • Heroic Suicide: She jumps out of the MSF helicopter in order to save Big Boss and the MSF survivors. Unfortunately, the blast radius of the explosion ends up derailing the helicopter anyway - but by being outside of the helicopter, she at least saved Miller, Morpho, the Medic, and Big Boss.
  • Image Song: Koi no Yokushiryoku, or Love Deterrence, performed by her Japanese voice actor, Nana Mizuki. Notably, it's the only Image Song for any character in the franchise's history, and doubles as the battle music for Peace Walker's True Final Boss. It later appears in Ground Zeroes and The Phantom Pain as an instrumental-only tape, and in the latter, a short clip of her humming a few notes.
  • Incorruptible Pure Pureness: Or not.
  • Killed Off for Real: In Ground Zeroes, she's killed by a bomb planted in her body.
    • Only for it to be revealed she's somehow still alive during The Phantom Pain, subverting this.
    • Only for the above to be subverted again when it's revealed she's just a hallucination brought about by Snake's failure to save her in Ground Zeroes. Talk about harsh.
  • Known Only by Their Nickname: Her real name is in fact Pacifica Ocean. In Ground Zeroes, everyone calls her Paz.
  • Latin Lover: Although Paz might not actually be Costa Rican, the diaries make it clear that she is at the very least a Latina.
  • The Mole: For Cipher, initially. This comes to bite her in the rear later on, when Skull Face detains her for possessing valuable information on Cipher; specifically, Zero's exact location, which no one else but her knows.
  • Never Found the Body: One of several indicators that she's just hiding. Ground Zeroes confirms she's alive... for a while, anyways.
  • Not Even Bothering with the Accent: In Ground Zeroes, she doesn't use her Colombian accent that she did in the previous game. Which is just as well, because she was using it as cover for her true identity.
  • Older Than They Look: Confirmed by her diary. She's actually in her early-to-mid 20s, but can and does easily pass for 16.
  • The Pollyanna: She remains tranquil and happy in any situation.
  • Posthumous Character: In The Phantom Pain. It doesn't stop her however from leaving her mark on Venom Snake. And by extension, Big Boss, her impact extending well into his dying breath in Guns of the Patriots.
  • Not Quite Dead: Ground Zeroes reveals that she survived falling into the ocean. This only lasts for a while, however.
  • Reunion Kiss: While it is not immediately after seeing him again in Ground Zeroes, Paz later finally confesses to Chico that she missed him, and gives him a kiss.
  • Scars Are Forever: She possesses scars on her arms. It's strongly implied that she got them from Hot Coldman when she was captured at the Puerto del Alba shipping facility and tortured.
  • Walking Spoiler: Just about everything about her in the endgame is not what the player is led to believe. It makes it impossible to actually discuss her character and her history without spoiling too much on her true presence in Peace Walker's story. This is also true for her appearance in Ground Zeroes and The Phantom Pain.
  • Wrench Wench: A surprising one; while likely acting with instructions or assistance, she's able to single-handedly modify ZEKE to have a manned cockpit with a water-based buffering system to protect her from impact. It's even implied Huey stole this idea from her actions, given his indignant response to Kaz and Ocelot bringing her work up, and his actions between Peace Walker and The Phantom Pain.
  • Undying Loyalty: Eventually develops this towards Big Boss. She refuses to sell him out under extreme torture, and her last act before dying is to sacrifice herself for him and the survivors of MSF.
  • Why Am I Ticking?: She has a bomb stuck in her stomach in Ground Zeroes. Snake and Chico are able to pull it out of her - but they don't know of the other bomb stuck in her body until it's way too late.
  • Woobie, Destroyer of Worlds: Well, she didn't actually get around to destroying anything, although that's only because Snake heavily damaged ZEKE and launched her into the water before she could get the chance to do so, but reading the diaries afterwards, and a few times before, you can't help but pity her for what she has to put up with. Ground Zeroes only serves to crank this Up to Eleven.
  • Zero-Approval Gambit: See Break His Heart to Save Him.

     Amanda Valenciano Libre 
"If the revolution succeeds, I want a peaceful country."
Voiced by: Romi Park (JP), Grey DeLisle (EN)

The leader of a branch of the Sandinista National Liberation Front. Had to take the job after her father was killed.
  • A Mother to Her Men: She cares for her troops.
  • Big Damn Heroes: She and the Sandinistas, alongside MSF, saved Big Boss from Zadornov and his KGB troops by storming the communications tower, and her directly forcing Zadornov to surrender by holding him up and arresting him. Bonus points for the fact that this action also finally got her troops to refer to her by the proper title of Comandante.
  • Dude, Where's My Respect?: Sort of: Her men do respect that she's their boss, but they insist on addressing her by first name basis instead of her rank of "Comandante" at least until they returned to Nicaragua and, alongside MSF, saved Snake fron the KGB by overtaking the base they took over.
  • Freudian Excuse: The reason she's a chain-smoker is because she survived a near-fatal case of malaria while she was young from a mosquito bite, and thus had a fear of mosquitoes.
  • Jeanne d'Archétype: She's the defacto leader of a Sandinista cell but it's not until later on in the game that she truly takes up the mantle of being Commandante, to the point of Snake explicitly comparing her to Joan of Arc. After the events of Peace Walker and Ground Zeroes, she even becomes a Nicaraguan heroine of the people.
  • Lonely at the Top: In The Phantom Pain, she's mentioned to have become a national hero in Nicaragua after the Sandinistas succeed in their socialist revolution. Unfortunately, her brother Chico died before she made it that far.
    • Surprisingly enough, overlaps with Earn Your Happy Ending, as she's the only known character from Peace Walker to end the game alive and contentnote .
  • Mama Bear: Amanda does deeply care for her younger brother Chico, and was willing to risk her life to rescue him when he was captured by the Peace Sentinel. However, she also doesn't have any qualms about killing him immediately when he was captured, rationalizing that it's better for him to die than be tortured by the Peace Sentinel and then executed afterwards.
  • The Mole: Miller suggests in The Phantom Pain that she still supports him and Diamond Dogs through providing intel and using her own connections with the now-ruling Sandinistas in Nicaragua.
  • Put on a Bus: She's absent in Ground Zeroes because she went to Havana. The Phantom Pain reveals that she returned to Nicaragua to join her fellow Sandinistas in winning their revolution, but her brother died 9 years earlier and won't ever see how far she made it.
  • Smoking Is Cool: Smokes in almost every cutscene with her.
  • Well-Intentioned Extremist: Her goal is to free her native country, Nicaragua, at any cost. She even admits that she believes she'll probably go to Hell when she dies.
  • You Killed My Father: It is implied in the game itself (and confirmed in her model viewer/strategy guide bio) that the Peace Sentinel were responsible for her father's death.

     Ricardo "Chico" Valenciano Libre 
"When I grow up, I wanna be a hunter!"
Voiced by: Kikuko Inoue (JP), Antony Del Rio (EN)

The twelve-year-old brother of Amanda and another member of the Sandinista National Liberation Front. An amateur cryptozoologist who possesses a surprising amount of in-depth knowledge on a variety of monsters.
  • The Atoner: He joined MSF primarily to redeem himself for having to sell out his compas from torture.
  • Big Damn Heroes: See Amanda and Miller's entries.
  • Body Horror: In Ground Zeroes, he has screws and bolts drilled into his heels to prevent him from running away, as well as a headphone jack in his chest.
  • Break the Cutie: Skull Face does this to him. Big time. By the time Snake finds him, he is so broken that even the sight of Big Boss freaks him out.
  • Child Soldier: Chico is constantly pissed at everyone treating him as a kid. Unlike most of the more tragic examples of this, Big Boss makes sure Chico is a volunteer, and also doesn't actually send him to go out fighting; Chico is a scout.
  • Did They or Didn't They?: It's implied that he and Paz may have in Ground Zeroes. However, the circumstances around it are horrifying.
  • Forced to Watch: Skull Face does this to him when he realizes that Chico has feelings for Paz, and proceeds to torture her in front of him.
  • Heroic BSOD:
    • Had a relatively minor one when Big Boss met him at the village, due to having talked under torture. He later has a much bigger one after Paz was revealed to be an enemy spy and he failed to stop her. The fact that he had a crush on her beforehand didn't help things either.
    • And a major one in the Ground Zeroes after being tricked into believing that Paz is dead, specially since he believes that it is his fault for taking Skull Face's offer. When Snake asks him Paz's location and when the tape of her torture was recorded, all Chico is capable of replying is that she is dead with an empty look inside his eyes. Considering what the kid has been through that past week, it's not that surprising.
  • Killed Off for Real: A Cassette Tape in The Phantom Pain confirms that Chico did not survive the helicopter crash in Ground Zeroes.
  • Killed Offscreen: While he was seen being caught up in the explosion created by the bomb sewed into Paz, as most everyone else on the chopper certainly survived, his death is left ambiguous. This continues into The Phantom Pain, where he isn't even mentioned once during the course of the game, and his death is only confirmed in solemn passing during a single cassette tape.
  • Mission Control: More or less takes over this job when Snake and Trenya visit Isla de Monstruo in Peace Walker, as he knows more about monsters than any of Snake's support crew.
  • Reunion Kiss: Has one with Paz in Ground Zeroes. He is quick to object, though, prompting her to apologize.
  • The Stool Pigeon: Lacerated Larry type: He was captured by the Peace Sentinels early into the game, and ended up revealing the locations of his comrades due to his being tortured by them. It's also implied that this happens to any FSLN member who is captured, and that most of them don't even live to see the light of day after they end up breaking from it.
  • Trauma Conga Line: Beginning at the end of Peace Walker and developed in Ground Zeroes. After the revelation that Paz was actually a spy, Chico, who has feelings for her, felt immense guilt at not being able to stop her from hijacking ZEKE. After he learns of her survival and is informed that MSF has no intention of rescuing Paz, he goes and tries rescuing her himself. Unfortunately, he gets captured, tortured, forced to watch Paz being tortured and then participate, broken into talking, tricked into believing Paz hates him, and then being led to believe Paz is dead because of him. And that's before Snake even finds him.
    • And then he dies in the helicopter crash offscreen at the end of Ground Zeroes.
  • You Killed My Father: Same as Amanda.

     Dr. "Huey" Emmerich 
"I believe in peace through nuclear deterrence."
Voiced by: Hideyuki Tanaka (JP), Christopher Randolph (EN)

Hal Emmerich's father and the creator of the Peace Walker. Like his son, Huey thought his machine was going to be used for a more peaceful purpose, and is upset to hear that it's actually a walking nuclear launch platform. He cannot walk and is confined to a wheelchair.
  • Abusive Parents: In The Phantom Pain, he was willing to use his two-year-old son to test-pilot Sahelanthropus. It's implied that he also deliberately tried to drown his 6-year-old stepdaughter with him when he committed suicide.
  • Affably Evil: In The Phantom Pain, he displays the same awkward kindess that he showed in Peace Walker, although it's abundantly clear that behind it he's become a loathsome human being.
  • Ambiguous Disorder: Like Otacon, he shows some signs of Autism Spectrum Disorder, such as Literal Mindedness, difficulty understanding other people's feelings and motivations, narrow focus on a few very specific interests, and just general social awkwardness. In The Phantom Pain, he has a very clear case of Delusional Disorder, although it's never diagnosed.
  • Artificial Limbs: In The Phantom Pain, he uses a powered brace-frame worn around his legs to stand and walk.
  • Ascended Extra: After being mentioned in the first three Metal Gear Solid games, he appears in person in Peace Walker.
  • Bad Liar: To the point Ocelot can tell he's lying through his teeth. His acting is so bad, you can just tell when he's trying to invoke a What the Hell, Hero? speech to Venom Snake. He sounds really hesitant and paused during it.
  • Became Their Own Antithesis: In Peace Walker, Huey courageously defied his boss, refusing to work for a deluded megalomaniac who thought he could do no wrong, and survived an attempt on his life in the process. In The Phantom Pain, Huey's become the deluded megalomaniac, abandoning his wife to die when she tries to defy him. All the courage and integrity he showed in Peace Walker is gone by the time of The Phantom Pain.
  • Believing Their Own Lies: In The Phantom Pain, he seems to have deluded himself into believing that he really didn't know that the "nuclear inspection" he arranged for MSF during Ground Zeroes was actually a Trojan Horse operation run by XOF. Taken to ludicrous extremes when he continues to adamantly insist that Strangelove was Driven to Suicide even in the face of solid evidence that he locked her in the Peace Walker A.I. pod to suffocate. Ocelot even lampshades this on a cassette tape, remarking that the hardest man to break is "the kind that's fooling himself."
  • Bitch in Sheep's Clothing: In The Phantom Pain, despite begging Diamond Dogs to rescue him, he routinely compromises the unit from within, causing chaos around the base.
  • Body Horror: His mechanical leg brace in The Phantom Pain is bolted into the bones of his legs. Furthermore, his leg bones are full of holes to account for all of the bolts; thus, if he loses the reinforcing parts of the brace, even the tiniest bit of force could break his legs.
  • Book Dumb: Inverted: he's a brilliant scientist but a social dunce. For instance, his response to Snake arriving to retrieve him XOF is to enthusiastically greet him as an old friend, not picking up on Snake's obvious contempt and distrust.
  • Bring My Brown Pants: In The Phantom Pain, he wets himself after Skull Face pushes him down the stairs.
  • Broken Pedestal: He idolized his father for his work in the Manhattan Project until a Japanese transfer student showed him photos of the Hiroshima bombing aftermath. And over the course of The Phantom Pain, he builds a legacy that will lead his son to feel the same way about him.
  • The Cameo: Has a voice-only appearance in the final cutscene of Ground Zeroes.
  • Chekhov's Gunman: In Metal Gear Solid 3: Snake Eater, he can be seen in a photo in Granin's office.
  • Child Prodigy: Kind of: He went to and graduated from MIT when he was in his late teens due to skipping ahead several grades.
  • Chronic Backstabbing Disorder: Suffers a serious case of this in The Phantom Pain. First, he helped XOF infiltrate the original Mother Base in return for a position in Cipher. Then, after Venom Snake wakes up from his coma, Huey begins to have second thoughts about working with XOF and defects back to the Diamond Dogs. He moves up to triple-crossing when he tries to create a mutated version of the vocal cord parasites to sell to Cipher. More than a decade later, Huey goes out with a final backstab aimed at his own family: when he catches his second wife sexually abusing his teenage son, he commits suicide in the family pool and attempts to drown his stepdaughter with him for extra revenge.
  • Cold-Blooded Torture: Subjected to this while imprisoned by the Diamond Dogs to extract what he knows about Cipher and the attack on MSF. Ocelot takes even more pleasure in this than usual. Besides waterboarding him, Kaz forces Huey's exoskeleton to bend his leg the wrong way until it almost breaks, and Ocelot threatens to inject him with a organism that will eat the metal rods in his legs (even going so far as to balance Huey's paralyzed legs on top of the needle, forcing Huey to twist himself away in order to keep the weight from pressing down on the plunger). As you find out, he deserved far worse than he got.
  • Comically Missing the Point: In a Black Comedy manner in the standard ending of The Phantom Pain, Huey completely fails to understand the point of getting revenge on two levels. To clarify, after Snake and Miller subject Skull Face to pure agony in addition to his already painful inevitable demise, they ultimately realize that their revenge was always a hollow goal (since they can never regain what they've lost) and they choose to leave him to die instead of killing him then and there. The first way Huey misses the point is that he unwittingly chooses to end Skull Face's suffering by shooting him in the head and depriving him of further pain. The second way is that he ultimately celebrates getting his revenge when what Skull Face did to him personally was petty at best when compared to what Snake and Miller suffered through. This is punctuated by Huey posing dramatically and yelling "REVENGE!" as everyone else looks on in confusion.
  • Doomed by Canon: See Driven to Suicide.
  • Dirty Coward: One of the things which makes him loathsome. He did screw over MSF for the job offer the Cipher organization gave him and by the time he's called out for all his crimes, he makes pathetic attempts at trying to save his own skin.
  • Driven to Suicide: He drowned himself (and almost took Emma with him) when he learned that his second wife was sexually abusing his son. Tellingly, he reacts to this like it's an insult to his masculinity and a betrayal on Hal's part, rather than an ugly statutory rape. There's a strong implication that Emma's involvement was not an accident but a means to inflict more pain on her mother and doting stepbrother.
  • Evil Cripple: The Phantom Pain reveals he's become this since Ground Zeroes. From murdering his wife after she objected to him using Hal in their experiment, to causing an outbreak of the parasite weapon on Mother Base, he's become positively loathsome since Peace Walker.
  • Fate Worse Than Death: When Huey is found guilty of betrayal twice over in The Phantom Pain, Venom Snake decides not to execute him outright. Instead, he has Huey exiled from Mother Base on a life raft too small to support his mechanical legs, stripped of his greatest treasure and exposed to the world as a fraud. Years later, his sins finally catch up to him, and he kills himself after learning that his second wife sexually abused his own son.
  • Foil: To both Code Talker in The Phantom Pain and his own son, Otacon.
  • Face-Heel Turn: Somewhere down the line an idealistic, well-intentioned and honorable man turned his back on everything he used to hold dear and became a selfish, power-hungry and thoroughly dishonest coward. Huey displays an outraged befuddlement when he gets called out for the crimes he's committed, such as helping deploy a biological weapon on board Mother Base that forced Venom Snake to murder multiple Diamond Dogs personnel to prevent an outbreak. Even then, Huey only expresses regret because he knows he's responsible and Venom being willing to execute his own men meant Huey was also at risk.
  • Generation Xerox: In Peace Walker Huey's basically 70's!Otacon: a cute, intelligent, peace-loving optimist who is even played by the same voice actor. Subverted in The Phantom Pain: it's revealed that he is responsible for allowing Skull Face's XOF crew on board Mother Base to destroy it. He continues his work on bipedal mechs at the cost of harming his son and eventually murdering his wife. On board the new Mother Base he is responsible for many more deaths through use of the parasite. In the crowning dick move, he denies everything when confronted, blaming everyone but himself. In short, Huey started out as a Xerox of Otacon but instead became a What If? of what Hal would be without the moral courage to take responsibility for his actions. This extends to the way his collaboration with Big Boss ends in tragedy, as opposed to their successors' long-lasting friendship.
  • Genius Cripple: He spends most of his time in a wheelchair due to a congenital malformation of the spine (which is strongly implied to be the result of his father's work on the Manhattan Project), and yet he's skilled enough to design and build several weapons. This also references "Dr. Strangelove".
  • The Ghost: He's mentioned twice in Metal Gear Solid and Metal Gear Solid 2: Sons of Liberty. The latter game also reveals he committed suicide after his second wife sexually abused Hal.
  • Hate Sink: Not so much in Peace Walker, but in The Phantom Pain, a significant portion of the storyline seems devoted to making people hate him. Among other things, he caused MSF's destruction, planned to put his own son inside Sahelanthropus, caused Strangelove's cruel death, and nearly got everyone in Diamond Dogs killed by releasing the surviving parasites on Mother Base in a failed bid to make a profit off them, all while adamantly denying any fault even when the evidence was right in front of him. In-universe, even Skull Face is completely disgusted by him.
  • Hypocrite: In The Phantom Pain, he declares that no one in Diamond Dogs has any right to judge him because they're all a bunch of cold-blooded killers. Of course, this is after he gleefully shot a helpless Skull Face in the head in the name of revenge.
  • Implausible Deniability: In The Phantom Pain. Even when faced with indisputable evidence that he sold MSF out to Skull Face and locked Strangelove up in the Mammal Pod to suffocate, Huey continues to adamantly insist that he thought the nuclear inspection was real and that Strangelove was Driven to Suicide.
  • It's All About Me: In The Phantom Pain. When Kaz points out that everyone ELSE involved with MSF lost something following the destruction of Mother Base, Huey has the gall to say he lost just as much as Kaz and Snake. Kaz lost an arm and a foot, Snake lost an arm and spent 9 years in a coma, and Huey lost... Metal Gear ZEKE. He also gained functioning legs, spent all his time with Strangelove, and raised a child.
  • Jumping Off the Slippery Slope: He does this several times over in The Phantom Pain.
  • Kick the Son of a Bitch: Having become a delusional Jerk Ass suffering from a horrific case of Never My Fault, one can't feel too sorry about the torture he suffers at the Diamond Dogs' hands. If anything, you'll wish Coldman kicked him down a bigger flight of stairs.
  • Laser-Guided Karma:
    • He makes a pathetic attempt at explaining away Strangelove's death at his hands by claiming she committed suicide. A decade later, Huey will commit suicide after his second wife betrays him.
    • After being set adrift, the boat he's in begins to leak from the weight and to save himself, he's forced to dump his precious robotic legs in the ocean.
  • Last Name Basis: In Phantom Pain, he's mainly referred to by his last name, but when you consider what he's become...
  • Mad Scientist: He defied this trope hard in Peace Walker by refusing to continue working for his Knight Templar boss and nearly getting himself killed in the process. But he played it completely straight in Metal Gear Solid V. Even his wife, who herself engaged in some science-of-dubious-sanity, is horrified by his decision to use their two year-old son as a guinea pig for the ST-84 test.
  • Mistreatment-Induced Betrayal: If the fact that Coldman used him to complete Peace Walker purely so he could then break his promise and launch a nuke from it didn't cause him to defect, Coldman pushing Huey (a paraplegic) down the stairs after the latter outright refused to continue to work with him certainly would have.
  • The Mole: He worked with XOF in order to compromise Mother Base after Cipher gave him a job offer and a promise of leniency in exchange for convincing MSF to agree to the inspection.
  • Murder by Inaction: How he killed his wife after she tried to prevent him from using their son as a guinea pig for his new Metal Gear.
  • Narcissist: Utterly convinced of his false intellectual superiority, prioritizes his own needs to the point of using his own son in a weapon and outright killing his own wife for objecting, incapable of taking any responsibility and acknowledging his own faults and mistakes, to the point of denying the evidence when its right in front of him... The Phantom Pain reveals him to be a truly revolting example of this trope.
  • Never My Fault: This to a T, as of The Phantom Pain. When he is called out for his multiple betrayals, Huey refuses to accept any blame. He makes up excuses (such as claiming that his wife had committed suicide or that he he was not aware of XOF's attack until it had started), tries to shift the blame (to Venom Snake for the deaths of the Diamond Dogs personnel even though Snake was only trying to prevent the spread of Huey's parasite), and claims that no one present has the right to judge him as they're all cold-blooded murderers (despite how he himself gleefully shot a defenseless Skullface in the head in the name of revenge, and how Venom was explicitly sparing his life).
  • Not What I Signed On For: He cooperated with Hot Coldman and the Peace Sentinels to develop Peace Walker under the belief that Peace Walker was strictly non-nuclear. Unfortunately, his boss wanted to instigate a Nuclear War. After learning this (after the frame was all but complete and little could be done), he quit.
  • An Offer You Can't Refuse:
    • It was strongly implied that part of the reason why Huey kept working on the Peace Walker project was because Coldman blackmailed him with revealing that he had plagarized the designs from Granin. However, after Huey learned that Coldman was planning to launch a live nuke for the test, Huey no longer cared if he was going to be exposed as a fraud.
    • In MGS5 we learn this is also the reason why he betrayed MSF: Cipher offered him a more profitable job with leniency attached. He accepted with no shame whatsoever, and then proceeded to delude himself into believing it was for the best.
  • Only Known by Their Nickname: "Huey" is actually nickname given to him by Strangelove, derived from the disabled service droid from the film Silent Running as a reference to his handicap.
  • Only Sane Man: Considers himself to be the voice of morality during his time with Diamond Dogs as one of the few non-combatants on base which is pathologically self-delusional as he's indirectly responsible for hundreds of deaths.
  • Persona Non Grata:
    • He ends up being blacklisted from the Central Heredia A.I. Lab's security clearance, apparently because he irritated Strangelove one time too many.
    • His final fate in The Phantom Pain when Venom Snake decides to exile him rather than let Ocelot blow his brains out.
  • Rewarded as a Traitor Deserves: Both XOF and the Diamond Dogs treat him with at best indifference and at worst naked contempt, as both know he's only with them until someone else makes him a better offer.
  • Sanity Slippage: There are early hints in Peace Walker during Big Boss's battle against the Pupa A.I. weapon. Huey actually seems more impressed than worried at the potential danger the weapon poses, only stopping to apologize after realizing what he's doing. This really takes off in The Phantom Pain when he displays a highly disturbing level of self-delusion and denial, spewing Blatant Lies even in the face of hard evidence that he's responsible for hundreds of deaths.
  • Significant Birth Date: Huey was born on the day of the Hiroshima bombing.
  • Small Name, Big Ego: He's shocked into disbelief after learning that Skull Face has managed to complete ST-84 without his assistance. The latter, in turn, bluntly tells Huey that he's no longer needed before trying to kill him and Venom with the Metal Gear.
  • Staircase Tumble:
    • Coldman pushes him down a set of stairs as part of his Establishing Character Moment.
    • Skull Face does this to him as well once his subordinates find Huey has been in radio contact with Big Boss and Diamond Dogs.
  • Super Wheelchair: For the '70s, anyway. His wheelchair has three wheels on each side, which enable him to go down stairs unassisted. Very practical, considering that ramps and elevators wouldn't be standard in public buildings until the 1990s.
  • Walking Spoiler: By the end of the The Phantom Pain, you sure won't be thinking of him as "Otacon in a wheelchair" anymore.
  • What the Hell, Hero?: Gives an unjustified one to Venom Snake when Venom is forced to kill his own men who are infected by the vocal parasites. Miller tells him to shut the hell up.Though in reality he doesn't actually care about the well being of others. He's outraged only because he's seeing that Venom is in fact capable of killing his own men if he really has to, so just being old buddies with him won't protect his life when they find out he's the cause of the outbreak.
  • Wheelchair Woobie: Until The Phantom Pain, where he's built himself lower-body exoskeleton. Tellingly, that is the point when he stops being sympathetic.

     Cécile Cosima Caminades 
"I've been thinking of giving up on studying birds and learning to fly myself. Want to hear my quetzal call?"
Voiced by: Yuu Kobayashi (JP), Catherine Taber (EN)

An ornithologist from France that was visiting Costa Rica when she was kidnapped by the Peace Sentinel. She escaped and was found by Big Boss, who took her back to Outer Heaven.
  • Drowning My Sorrows: Cécile ends up drunk at one point due to, ironically, Kazuhira Miller's poor choice of a wine year (the 1970s wine was cited by her to be a terrible year for France's wine industry).
  • Everyone Looks Sexier If French/Everything Sounds Sexier in French: Cécile looks stunning as a blond parisenne, enough for Miller to attempt to flirt with her on multiple occasions. It backfires, though.
  • Foreshadowing: Cécile tells Miller that although the tape was hers, she wasn't Paz's friend, and in fact never even met her. This foreshadows that Paz was not who MSF thought she was.
  • Genius Ditz: She is skilled at bird watching and ornithology, but other than that, she's not too bright. Paz even privately remarked to herself that Cécile was a ditz when she asked her if she was attracted to Big Boss.
  • Ink-Suit Actor: Sort of. Although not voiced by her, Cécile's design was literally based on the real life Cécile Caminandes, who was the foreign relations manager for Konami Paris.
  • Put on a Bus: Goes back to France shortly after the events of Peace Walker, never to be heard from again.
  • Voice Changeling: She's perfectly capable of mimicking various bird sounds, as well as sounds of a pig, a sheep, a monkey, and even a rabbit. She cites that her altering her voice was actually part of her job as an ornithologist.

     Dr. Strangelove 
"Why was a legendary hero forced to betray her country? Why was she targeted for assassination by you, her most beloved disciple? I've no use for fabrications. I want the truth... The Boss's last will."
Voiced by: Yumi Kikuchi (JP), Vanessa Marshall (EN)

The scientist developing the A.I. for the Peace Walker. She's basing it on The Boss' mind. A misanthropist.
  • And I Must Scream: If the oxygen deprivation didn't finish her off, she most likely starved to death, trapped inside the A.I pod.
  • Anti-Villain: She who only worked with the Peace Sentinel so she'd have a chance to revive The Boss.
  • Beauty Mark: Below her lower lip.
  • Bi the Way: It's implied in the second ending as well as in one of the briefing tapes that she does possess some attraction to someone who is of the opposite sex, namely Huey, and we already know about her attraction to The Boss and possibly Paz. Was Depraved Bisexual near the start of the game before settling for simply being Bi the Way.
    • Possibly subverted. In The Phantom Pain, it's revealed that she thinks of her son Hal as the child of her and The Boss rather than Huey, and that she was merely manipulating the latter into being a Chosen Conception Partner. It's a bit unclear if she always felt that way, but any feelings she might have had for him were long gone by the end.
  • Boyish Short Hair
  • Cold-Blooded Torture: Subverted. While she does torture Big Boss with high-voltage stun batons, she makes it clear from the start of the first session that she takes no pleasure from doing so, and by the third one, she states that she no longer hates Big Boss for killing The Boss and begs him to stop asking her to kill him.
  • Cool Shades: Never seen without them.
  • Covert Pervert: Unlike most examples, she really doesn't let it be known until well after the main game is over - and that's if you bother to listen to tape files. Paz has no idea she's getting fondled by her.
  • Cruel and Unusual Death: After learning Huey's intentions to place Hal in Sahelanthropus and fighting with him, she winds up getting trapped inside the recovered Mammal Pod and slowly suffocates to death.
  • Death by Irony: It seems almost poetic that one who spent decades pining and obsessing over a long dead woman who'd never love her back, ends up dying inside an A.I. pod meant to house said woman's "personality" and "memories". Her last recording takes it further, mentioning that since she'd sold out most of The Boss's A.I. data to Cipher already, she considers it fitting that the pod she dies in is nothing but an empty husk, having ultimately failed to follow her will.
  • Despair Event Horizon: Her husband sends her rocketing over this when she realizes he's not going to help her out the A.I. pod she's trapped in. Strangelove is reduced to begging for a quick death as she realizes the severity of her situation.
  • Does Not Like Men: Dr. Strangelove doesn't even bother to hide it. It's not impossible for her to respect or be attracted to a man, but in general, they really aren't her thing. Then again, most women don't measure up to her criteria either; there's only been one woman she's really loved.
    • Understandably subverted in the case of her only child, Hal. Regardless of his gender, she gives her life in trying to save him from her insane husband's attempt at making him a guinea pig in the ST-84 tests they were conducting.
  • Driven to Suicide: Subverted: She did consider committing suicide or at the very least embracing death after the Peace Walker project was completed, but she changed her mind after The Boss/Peace Walker sacrificed herself again to avert nuclear war.
    • And then in The Phantom Pain, Huey claims this is what happened to her when Diamond Dogs finds her corpse inside the Mammal Pod. Naturally, since Huey has already been established as a pathological liar by that point, nobody believes him.
  • Even Evil Has Standards: She's disgusted with the fact that she has to torture Snake, even though she strongly dislikes him.
    • Strangelove is a pretty callous individual who usually doesn't care about much other than her work, but she's genuinely horrified when Huey suggests using their own son to pilot Sahelanthropus and attempts to defy him at the cost of her own life.
  • Evil Albino: It's not so much as "evil" as "has her own motives for working with evil".
    • Heroic Albino: She is working with Coldman, but her primary motivation is to resurrect the Boss. She really doesn't care about his ulterior motive, and helps Snake destroy the A.I. since it'll turn the world into ash and nuclear waste if he doesn't.
  • Evil Brit: Subverted, Strangelove just has her own reasons for serving evil.
  • Evil Genius: To Coldman's Big Bad (well, maybe not so on "Evil").
  • Fling a Light into the Future: The Phantom Pain reveals that she sees her son, Hal (aka Otacon) as this. And that in saving his life, she hopes the Boss' will would endure to thwart Cipher and in time, the Patriots.
  • Heel-Face Turn: And she joins MSF after the Peace Sentinel are stopped, and possibly even sometime beforehand if her letting Snake keep the ID card that he stolenote  is anything to go by.
  • Heroic Sacrifice: She managed to save her son, Hal (aka, Otacon) from becoming a tool in Huey's increasingly twisted experiments. At the cost of her own life.
    • Senseless Sacrifice: While she manages to save her son from being used to pilot Sahelanthropus, years later, her plan to keep Hal away from Huey for as long as possible ends up falling through, and Hal's childhood is awful because of it. She also highlights during her final speech that had she been quicker to respond or unafraid of possible injury, she could have made it out of the pod alive, making these events possibly preventable.
  • Luke, I Might Be Your Father: It's never confirmed, but the scene in the second ending where Strangelove and Huey come to a better understanding that had a somewhat romantic undertone has led some people to speculate that Strangelove at the very least married Huey, if not gave birth to Hal Emmerich (Otacon). The fact that Nastasha Romanenko's book also made it clear that Hal had some British relatives seemed to support it. Confirmed in Metal Gear Solid V: The Phantom Pain.
    • They're both fans of 2001: A Space Odyssey.
  • I Am Very British: It's in the accent; haughty to the max. This is despite her apparently hailing from Manchester.
  • Inspector Javert: Somewhat, she blames the Boss's death on Snake, which is partially true, but she thinks he did it for glory because it was a Thanatos Gambit done in order to save her country.
  • Leitmotif: Sing
  • Mama Bear: In The Phantom Pain, it's revealed that she had her son, Hal (aka, Otacon) taken away from Cipher's grasp and Huey's for his own safety. Even at the cost of her own life.
  • Manipulative Bitch: The Phantom Pain reveals that she never really loved Huey, merely using him as a Chosen Conception Partner and considering Hal her "child with The Boss". Although this by no means excuses Huey's actions, it does provide some alternative interpretation as to why their relationship spiraled down that far.
  • Murder by Inaction Her final fate courtesy of her own husband who decides not to try break her out of the A.I pod she gets sealed into.
  • Only Known by Their Nickname: Strangelove's nickname, despite sharing the same name as the film's title, is derived from her evident sexuality and was used in a rather insulting manner.
  • Persona Non Grata: When Strangelove requested to join MSF to Big Boss via Kazuhira Miller, Miller stated that she was unable to return to England for reasons that, despite Miller telling Big Boss that she'll explain why, we never actually find out.
    • Her backstory said that she was a student and friend of Alan Turing. Consider that and the fact that, for the time, homosexuality was still considered no better than a mental disease, it's more likely that every IT lab or firm would laugh her away.
  • Put on a Bus: After finishing ZEKE's AI, she retired from MSF and returned to Britain. And then it's later revealed that she was working with XOF during the nine years between Peace Walker and The Phantom Pain.
    • Bus Crash: In an effort to save her son, Huey indirectly kills her, sealing her inside a mammal pod.
  • Turn Out Like His Father: The Phantom Pain reveals that she made an effort to avert this trope for her son, indeed seeing him as her child with The Boss rather than with Huey. Given how Otacon turns out later on in the timeline, she succeeded.
  • White Hair, Black Heart: Has silver hair, though her heart isn't really all that black.
  • Wicked Cultured: Is very well read and enjoys movies - she often uses movies and literature to explain her inspirations to science, her methodology, and her philosophies toward life. She becomes considerably less "wicked" by the end of the game, though.

     Ramón Gálvez Mena/Vladimir Aleksandrovich Zadornov 
"Rocket peace!"
Voiced by: Houchu Otsuka (JP), Steve Blum (EN)

A professor who contacts MSF along with Paz, requesting they to drive the Peace Sentinel out of Costa Rica. Actually a KGB agent.
  • Artificial Limbs: He has a red prosthetic right hand with built-in lighters.
  • Cardboard Prison: After you capture him and lock him in the brig, he continually manages to escape regardless of the measures taken to hold him. As it turns out, he had inside help.
  • Dirty Communists: He's a KGB agent, which Snake figures out from the get-go.
  • Even Evil Has Standards: Apparently, Zadornov did not plan on Coldman actually going through with launching the nukes, and he certainly did not plan or want Coldman to leak the fake missile data to NORAD.
    • Given the above mention of not planning on Coldman actually going through with the launch, it also qualifies under Gone Horribly Right.
  • Hoist by His Own Petard: Remember the FSLN group he and the rest of the KGB manipulated earlier? Well, they ended up turning on him right as he was about to execute Big Boss, which was ironically right after he himself betrayed Coldman.
  • Paper-Thin Disguise: Snake's able to see through his story extremely quickly after taking a good look at his prosthetic hand.
  • Rocket Punch: Tries to kill Big Boss in this way before his death. It doesn't work.
  • Red Right Hand: A literal prosthetic one, which also acted as the reason why Big Boss deduced him to be, in fact, a KGB agent from the get-go. Also doubles as a fully functional cigarette lighter.
  • Smoking Is Not Cool: He used to be a heavy smoker, with his prosthetic hand even containing lighters, but he quit because it was "ruining his lungs."
  • Smug Snake: Particularly in Act 4 and Act 5. Of course, being voiced by Steve Blum in the English version probably helps.
  • Unwitting Pawn: Paz's choice of words imply that he could either have been unknowingly working for Cipher, or that he could have actually been a Cipher agent like Paz herself.
  • You Have Outlived Your Usefulness: Zadornov almost pulled this off on Big Boss, had the MSF and FSLN not burst in at what is literally the last moment. Might have also himself been placed this way by Paz later on, although unlike most examples, he seemed to be aware of and fully accept that his death meant his own usefulness was expended.

     Hot Coldman 
"The age of heroes is over, buried alongside The Boss and her bankrupt beliefs."
Voiced by: Mugihito (JP), H. Richard Greene (EN)

Former CIA director and main antagonist of Peace Walker. He was also the one behind Operation Snake Eater.
  • Ax-Crazy: His idea of world peace and nuclear deterrence is start a nuclear war, nuke whoever started it, nuke whatever's left, and let "peace" reign.
  • Bad Boss: He pushed Huey (who was a cripple) down the stairs after the latter states that he cannot participate in the project anymore when he learns that Coldman intends to use a live nuke for the test launch for Peace Walker. It is also heavily implied that Coldman also plans on killing off the Peace Sentinel once the Peace Walker tests are completed because they served their use in Strangelove's diary tapes. His stance as a bad boss was also just as bad back when he was the CIA Director in 1964, where he manipulated the factors into creating a near catastrophe just to create an excuse to kill off one specific person, The Boss. It's also implied in EVA's tapes that he (if not the entire organization he was leading at that time) was also directly responsible for having The Boss's operation sabotaged by having a sleeper agent completely defect to the Soviet Union and feed NASA false information by having a large percentage of the sleeper agent's paycheck pocketed.
  • Bald of Evil: See that shiny dome + Smug Smiler combo? You do the math.
  • Big Bad:
    • He's essentially this for Peace Walker, though it gets a bit more complicated later on.
    • He, along with Colonel Volgin, are essentially this for the entire series, in some respects. Without Coldman's machinations to have Volgin use a nuke, which lead to the necessity of Operation Snake Eater's mission to assassinate The Boss, none of the series' later events would have happened as we know them.
  • The Chessmaster: He was behind both the Virtuous Mission and Operation Snake Eater all to get rid of The Boss, and even deliberately manipulated events so the end result would be The Boss' death.
  • Driven to Suicide: A notably spiteful version. After Zadornov changed the target to Cuba, as well as shot him, he activates Peace Walker with the implied intention of dying before he could divulge the abort code to ensure that no one can stop his plan.
  • Establishing Character Moment: In his first scene, he pushes Huey Emmerich down a flight of stairs after a rant about how a nuke must be launched for his test to be completed.
  • The Exile: It is strongly implied that he was sent to Central America as a Station Chief after being demoted from CIA Director because the CIA was disgusted enough with his planning Operation Snake Eater that they demoted him and packed him away, especially with the implication that he attempted to basically brag about it beforehand.
  • Evil Cannot Comprehend Good: The entire reason for the Peace Walker project is because Coldman genuinely believed that humans were too weak-willed to actually retaliate against a nuclear strike even to save their own lives, going so far as to have Peace Walker transmit false data to NORAD in order to force the military to decide whether or not to retaliate. Posthumously, Coldman is proven wrong when the military actually does try to order a retaliatory strike, and are only prevented from doing so when Peace Walker drowns itself in Lake Nicaragua to stop the data transmission. Venom Snake even lampshades this on a cassette tape in The Phantom Pain:
    Venom Snake: "Humans are incapable of destroying themselves?" Turns out he never knew what humans are capable of.
  • Expy: Most of Coldman's character traits (including being responsible for a destructive and quite tragic event that sets off the game series with no remorse, not to mention being exiled for reasons relating to said destructive and tragic event) are eerily similar to that of Doctor Weil. Ironic, seeing how Snake's real life father also voiced that character, and Big Boss would end up being voiced by him when he becomes older, as in Metal Gear Solid 4.
  • Ironic Name: Combined, his name makes no sense.
    • Actually, it does when one remembers the Hot Cold War phases, which were the most tense phases of the Cold War, with both being in the 60s and the 80s. The ironic part comes from the fact that he's a main character in the Detente Era (the 70s), which was the most peaceful phase of the Cold War.
  • Kicked Upstairs: He was reassigned to South America after Operation Snake Eater. He's less than happy about that.
  • Knight Templar: His whole intent was to make the "perfect deterrent" with Peace Walker, intending its launch to be the final nuke ever launched. Of course, let's not forget that he's completely batshit insane, and wouldn't even consider that he'd done anything wrong even if his actions resulted in a nuclear holocaust.
  • Lack of Empathy: For planning The Boss' death. His exchange when encountering Snake tells all:
    Coldman: I know all about you. Tselinoyarsk? Ten years ago?
    Snake: You were involved...?
    Coldman: The operation to eliminate the traitor? I planned the whole thing.
    • Note that during the entire exchange, Coldman was grinning immensely and evilly.
  • Laughing Mad: When he activates Peace Walker.
  • Manipulative Bastard: Hot Coldman was implied to have set things up for The Boss to be killed off, including the ending of the Virtuous Mission. In addition, it was heavily implied that he may have orchestrated his death as well as also programmed the Mammal Pod to leak false data to NORAD, as well as manipulating various factors such as most of the Executive Branch's cabinet heading over to Vladivostok for the SALT II talks. The one thing that was probably not even his choosing was Zadornov changing the target to Cuba.
  • Omnicidal Maniac: Hot Coldman nearly causes the destruction of the entire planet when he not only activates Peace Walker and have it launch a nuke at Cuba (thanks to Zadornov's betrayal), but also have Peace Walker's Mammal Pod transmit the false data to NORAD. Although he mentions that he wants them to not retaliate to prove that they are too weak willed to do effective retaliation, he also makes it quite clear that he wouldn't have cared if they actually did strike back. It's also heavily implied that he programmed this into the Mammal Pod from the start, and not as a last minute attempt due to his dying.
  • Reassigned to Antarctica: Implied to be the reason why Coldman was made the CIA Station Chief of Central America shortly after losing his job as CIA Director. See The Exile or Kicked Upstairs.
  • Smug Smiler: Alternates between this and Slasher Smile in virtually every single appearance he makes, depending on the context and his mood.
  • The Sociopath: He's almost as cruel as Volgin.
  • Straw Nihilist: He mentions that The Boss, her ideals, and even heroes themselves are bankrupt, buried, and over, vowing that the only heroes afterwards will be machines.

    Peace Walker 

An A.I. weapon developed by Huey and Dr. Strangelove, Peace Walker is meant to be the ultimate nuclear deterrent; an unmanned nuclear platform that is capable of retaliation in the event of a nuclear war. One of the AIs built into Peace Walker is known as the Mammal Pod, which has the personality, memories and thought patters of The Boss.
  • Electronic Speech Impediment: Speaks with a robotic inflection, at least when it isn't singing or quoting lines from Metal Gear Solid 3.
  • Expy:
    • Of Joshua, of WarGames; an A.I. who almost causes a real nuclear war after being given data about a fake one.
    • It also shares similarities with the Doomsday Device from Dr. Strangelove. Basically, if a nuclear attack occurs, it will retaliate.
  • Heroic Sacrifice: Throws itself into the ocean rather than cause a nuclear war.
  • Heroic Willpower: Despite being destroyed, the Mammal Pod manages to override the Reptile Pod and throw itself into the ocean to prevent a nuclear war.
  • Leitmotif: Sing, a trait shared with Dr. Strangelove.
  • No Plans, No Prototype, No Backup: Subverted in that the other A.I. Weapons ARE the prototypes. And Hot Coldman is willing to risk starting a nuclear war to prove to the government that it's worth funding. And given how things turned out, it's not surprising that the U.S. didn't want to make any more.
  • Replacement Goldfish: Dr. Strangelove based the mammal pod's A.I. on The Boss.
  • Rousseau Was Right: Peace Walker was built with this in mind, the idea being that no human would be capable of launching a retaliatory strike in the event of a nuclear war. Unfortunately this doesn't prove to be quite true, as the U.S. government comes very close to launching an attack when it feeds NORAD data about a fake nuclear strike.
  • Spiritual Successor: The Hybrid Pod, a combination of the Mammal Pod and the Reptile Pod that also uses The Boss's AI and was developed by Strangelove and Huey after they were "employed" by XOF. It was designed to be the pilot of Sahelanthropus, but the idea was swiftly rejected by Skull Face, who didn't want to repeat "Coldman's mistake".
  • Tomato in the Mirror: One of the tapes features Dr. Strangelove having the mammal pod run simulations of the Virtuous Mission and Operation Snake Eater, only for the A.I. to start panicking when it can't figure out why it (and by extension, The Boss) betrayed the U.S.

    Gear REX 

A non-canon Bonus Boss added to the game as part of the Monster Hunter collaboration, Gear REX is a Brute Wyvern-class monster that mutated an acid-spewing turret on its back due to nuclear tests or something. A monster battled on Isla Del Monsturo (along with Rathalos and Tigrex) by Big Boss. Attacks with hurled spikes and a tail-like limb that sprays a corrosive fluid.
  • Bloody Murder: It shoots a spray of Hollywood Acid from the protuberance on it's right shoulder.
  • Bonus Boss: Alongside Rathalos and Tigrex as part of the Monster Hunter Crossover Extra Ops. This monster in particular is worthy of the title as well; the fourth fight can be potentially harder than Peace Walker Custom.
  • Bullfight Boss: If it's not shooting you with mucus lasers or scales, it's charging at you incessantly.
  • Canon Foreigner: For both Monster Hunter and Metal Gear as a whole. Only time will tell if it becomes a Canon Immigrant for Monster Hunter (though unlikely).
  • Everything's Better with Dinosaurs: Is there any reason for monsters to exist off the coast of 1976 Costa Rica? No, but it's awesome anyways.
  • Expy: It's basically the Metal Gear REX in monster form.
  • Flunky Boss: Like Rathalos and Tigrex, the first two Extra Ops against it come with Velociprey.
  • Frickin' Laser Beams: Okay, so it's technically acidic mucus, but it still works the same way. It even has the same firing patterns as REX's laser cannon!
  • Made of Iron: This thing can take a lot of punishment, in a world filled to the brim with conventional (and unconventional) modern weaponry. Assault rifles, rockets, tranquilizer guns, tranquilizer rockets, human slingshots, you name it, it'll eat it.
  • Make Me Wanna Shout: Like many other monsters, it can roar, which depletes Snake's PSYCHE. Unlike other monsters, it can also shoot its scales at you, which then resonate when it roars, thus extending the roar's range, before exploding. This can harshly burn through Snake's PSYCHE extremely fast, unless you equip the Sony WALKMAN, which simulates Monster Hunter's "Earplug" effect.
  • Rare Random Drop: Its mucus. Acquiring it allows you to develop the Sling Band component of the Human Slingshot.
  • Recurring Boss: Unlike Rathalos or Tigrex, Snake gets to fight it four different times, with each fight even more difficult than the last.
  • Red Baron: The Steel-Fanged King.
  • Rent-a-Zilla: It's a dinosaur version of the series' most famous Humongous Mecha. How cool is THAT?
  • Robot Me: Inverted, Gear REX is an organic dinosaur version of Metal Gear REX. Then again, given that Peace Walker is set in 1974 and the original Metal Gear Solid was in 2005, it's possible that Metal Gear REX might been modeled after Gear REX.