History Characters / MetalSlugDefense

* BareYourMidriff

* DarkSkinnedBlonde: Has a slight tan and blonde hair.

* DummiedOut: Most of the fighters are present in ''Attack'''s data as filler. Over time, they are replaced by new original characters.

* DarkSkinnedBlonde

This page is for characters who debuted in ''Metal Slug Defense'' and ''Metal Slug Attack''; the rest of the ''VideoGame/MetalSlug'' cast can be found [[Characters/MetalSlug here]].

!Debuted in ''Metal Slug Defense''

[[folder:Issenmantaro]]
Also known as 10000000TARO, he appears as part the ten million download campaign. He reappears in ''Attack'', now named 6000000TARO.

* CloseRangeCombatant

* MeaningfulName: Named after the number of downloads ''Defense'' got.

* PaletteSwap: Basically a red-headed Hyakutaro.

----

!Debuted in ''Metal Slug Attack''

[[index]]
* [[Characters/MetalSlugDefenseRegularArmy Regular Army]] [[note]]MS-Alice, Anna Wiese, Midori Schumann, Mello, Rita Lewinsky, Amber, Perche, Nikita, Reika Bradford, Ami, Molly, and Louise[[/note]]
* [[Characters/MetalSlugDefenseRebelArmy Rebel Army]] [[note]]Abigail, Beatriz, Vita, Navy, Nova, Destrade, Shizuka, Rapid, Huracan, Aisha, Julia, Chloe, Izabella, Grazia, Loretta, Edda, Dion, and Norah[[/note]]
* [[Characters/MetalSlugDefensePtolemaicArmy Ptolemaic Army]] [[note]]Dragunov, Yoshino, Caroline, Veronica, Sisilia, Towa, Mira, Simon, Anastasia IV, Anastasia's Believers, Miharu, Chunyan, Owen, Sho, and Maria[[/note]]
* [[Characters/MetalSlugDefenseSpaceArmy Space Army]] [[note]]'''Martians:''' Professor, Marty, Percier, Clone Abby, Clone Betty, Mars People Rangers, Ariadna, Gemini Twins, and Halle; '''Invaders:''' Odette, Annette, Lydia, Nowan, Schwarz Metzelei, Fedeln Metzelei, Rillacle, and Franke[[/note]]
* [[Characters/MetalSlugDefenseIndependentArmy Independent Army]] [[note]]Scotia Amundsen, Red Goblin, El Dorado, Vatn, Cleopatra, White Baby Prototype, Jin, Aileen, Elysion, Esther, Aswang, Licht, Elena, Agalia, Alma, Iron Fortress, Valerian Bears, Arisone, [=HMT=], First Baby, and Teresa[[/note]]
[[/index]]

* WrenchWench

* [[Characters/MetalSlugDefenseRegularArmy Regular Army]] [[note]]MS-Alice, Anna Wiese, Midori Schumann, Mello, Rita, Amber, Perche, Nikita, and Reika Bradford[[/note]]
* [[Characters/MetalSlugDefenseRebelArmy Rebel Army]] [[note]]Abigail, Beatriz, Vita, Navy, Nova, Destrade, Shizuka, Rapid, Huracan, Aisha, Julia, Chloe, Izabella, and Grazia[[/note]]
* [[Characters/MetalSlugDefensePtolemaicArmy Ptolemaic Army]] [[note]]Dragunov, Yoshino, Caroline, Veronica, Sisilia, Towa, Mira, Simon, Anastasia IV, Miharu, and Chunyan[[/note]]
* [[Characters/MetalSlugDefenseSpaceArmy Space Army]] [[note]]Professor, Marty, Percier, Clone Abby, Clone Betty, Mars People Rangers, Ariadna, Odette, Annette, Lydia, Nowan, Schwarz Metzelei, and Fedeln Metzelei[[/note]]
* [[Characters/MetalSlugDefenseIndependentArmy Independent Army]] [[note]]Scotia Amundsen, Red Goblin, El Dorado, Vatn, Cleopatra, White Baby Prototype, Jin, Aileen, Elysion, Esther, Aswang, Licht, Elena, and Agalia[[/note]]

!!Regular Army
[[folder:MS-ALICE]]
[[quoteright:120:http://static.tvtropes.org/pmwiki/pub/images/msa_alice2.png]]

An A.I. made sentient due to a programming error from Marco. Alice controls and inhabits an SV-001 and is able to produce a mass hologram of herself.

* ActionDuo: Eventually became one with Marco in the form of EquippableAlly, who's able to utilise Alice's full potential.
* AttackAttackRetreatRetreat: Her "close range attack" is her running away with her Metal Slug in reverse. In her Extra Ops debut, she pulls this when she couldn't put a dent on Crablops and was about to be swarmed by the mutated crabs. Can also be a TacticalWithdrawal since it allows her to use her long range attacks again, especially when the enemy is distracted by units in front of her after retreating.
* BecomeARealBoy: During the Halloween Another Story, she chose to work with Aswang for the possibility of gaining a flesh-and-blood body, for the purpose of being able to interact with her creator on a physical plane.
* CallingYourAttacks: Blows on a whistle during regular attacks and shouts into a megaphone during her Special.
* CuteMonsterGirl: Her "[[AllHallowsEve Halloween]] Alice" variant. Operating a new timed firing program changes her appearance into a more [[{{Fanservice}} fanservice-y]], [[BareYourMidriff midriff-bearing]] [[HornyDevils Horny Devil]]. [[RuleOfSexy Said to be a prank by the creator of said firing program.]]
* MarilynManeuver: When using a special attack, she moves upwards while her Slug leaps to fire a series of cannons. She holds her skirt down when she descends to normal height.
* MilitarySalute: Makes a tearful one as she's dying.
* NarrativeProfanityFilter: It's less "profanity" and more "anything inappropriate". Marco being the PapaWolf, programmed a filter or a content regulator into her that prevents her from thinking about anything seductive or sexual. Which makes her interaction with [[TheCharmer Vatn]] a little bit [[CringeComedy awkward]].
* TakingYouWithMe: Tosses her destroyed Slug to the opposing army.
* UndyingLoyalty: Towards her creator, Marco. [[TakingTheBullet Even as far as to hurl herself at an attack that was meant to kill him.]]
* VictoryPose: Shares the same one as Marco.
[[/folder]]

[[folder:Anna Wiese]]
[[quoteright:120:http://static.tvtropes.org/pmwiki/pub/images/msa_anna.png]]

A soldier of the Regular Army. She was selected from the army to assist the Ikari Warriors.

* KickChick: Her close range attack is a crouched kick.
* AscendedFanboy: She is very enthusiastic to work with the team she admires.
* PaletteSwap: Of Tyra Elson.
[[/folder]]

[[folder:Midori Schumann]]
[[quoteright:182:http://static.tvtropes.org/pmwiki/pub/images/msa_midori.png]]

A weapons engineer of the Regular Army, also part of the Sparrows division.

* AllThereInTheManual: Her last name is revealed in her concept art.
* BareYourMidriff: A standard for the Regular Army.
* ChildSoldiers: Her age isn't given, but she's certainly young enough that both Marco and Eri are very uncomfortable with actually sending her into a battle, even though circumstances necessitated it.
* ConvenientlyAnOrphan: Her parents died from a war. Her and Special Eri (also an orphan) both make the "Not Alone" team.
* ExtendoBoxingGlove: One of her close range attacks is a glove coming from her bag of tools.
* PaletteSwap: Her Tetsujin Kun weapons, which are brightly colored Slug Armors.
* RoseHairedSweetie: Takes the battlefield in a far less serious matter than any other soldier.
[[/folder]]

[[folder:Mello]]
[[quoteright:135:http://static.tvtropes.org/pmwiki/pub/images/msa_mello.png]]

A battle office lady from the future. She aids the Regular Army after accidentally landing on their base.

* FrickinLaserBeams: From her laser gun.
* TheRival: To Nova.
* {{Stripperific}}: Is able to reduce her suit to a bikini in her victory animation.
[[/folder]]

[[folder:Rita]]
[[quoteright:114:http://static.tvtropes.org/pmwiki/pub/images/msa_rita.png]]

A PF squad recruit who joined the Regular Army around same time as Roberto Nicola.

* ApologeticAttacker: In her Extra Ops event "Top Prospect", she apologises to the Amadeus Morden Robot before she finishes it off. [[SelfDestructMechanism Not that the robot needed to be finished off.]]
* CuteBruiser: Gives off this vibe as well as {{Adorkable}} tendencies.
* DodgeTheBullet: Roberto says she's able to dodge bullets during training. Becomes GameplayAndStoryIntegration where Rita actually has a skill that allows her to dodge projectiles from enemy units.
* TheFashionista: Unlike her fellow teammates who wear standard military attire, she dresses in latest girly fashion trends.
* KickChick: Rita is apparently useless with a firearm but she excels in her physical training. According to Tyra, she could destroy a tank's cannon just by kicking, and that's before she was given special leg armor made by Midori. Not to mention she only uses her left leg in combat.
* LetsGetDangerous / IAmNotLeftHanded: Her special attack begins by warping a second leg armor onto her right leg and perform a HurricaneKick.
* RedBaron: Earned the nickname "Wild Child on the Battlefield", though she wouldn't call herself a "wild child".
* [[RemembertheNewGuy Remember the New Girl]]: She joined the Regular Army around the same time as Roberto, even though Roberto's debut dates back to Metal Slug Mobile 4 in 2008.
* TookALevelInBadass: Before joining the Peregrine Falcons, Rita was from a rural area of Japan.
[[/folder]]

[[folder:Amber]]
[[quoteright:214:http://static.tvtropes.org/pmwiki/pub/images/msa_amber.png]]
A lone wolf pilot who drives a modified Slug Gunner. Joined the Regular Army at Marco's request.

* AbsoluteCleavage: Although not as low as Veronica's, the zipper ends just below her bosom.
* NoSell: Her Gunner cannot be damaged while in tank mode.
* PileBunker: Longer than the standard Gunner. Her special attack gives it an explosive effect.
* RegeneratingHealth: Recovers part of her health every five seconds.
* SugarAndIcePersonality: According to Roberto, her cold personality is due to her not being accustomed to making conversations. She gets friendly once they get to know her.
* TransformingMecha: Her Slug Gunner opens up and starts attacking when near enemies.
[[/folder]]

[[folder:Perche]]
[[quoteright:120:http://static.tvtropes.org/pmwiki/pub/images/msa_perche.png]]
A pilot of a prototype PoweredArmor developed by the Regular Army's top secret weapon systems program known as the Metal Device Project.

* AlmightyJanitor: In a literal sense. At the beginning of her Extra Ops, she finds herself training and cleaning instead of being the hero she wanted to be. It's to the point that soldiers ''depend'' on her to clean the mud off the corridors!
** MundaneUtility: She ends up using the armor to clean faster, to the amazement of onlookers.
* {{BFG}} / GatlingGood: Wields a gatling gun. While she normally fire regular bullets, summoning a weapon pack allows her to upgrade to [[ArmorPiercingAttack armor-piercing attacks]].
* BackpackCannon: Activating her special the first time has her summon this to her. Activating her special again allows her to fire one or two missiles from it with serious SplashDamage before detaching it.
* ClingyCostume: The armor connects to the nervous system of its pilot.
* EmpoweredBadassNormal: The description says the suit give its pilot the durability of heavy weaponry by using synthesized muscles created from the analysis of muscle tissue from an archdemon.
* FieryRedhead: She's [[HotBlooded passionate]] and a [[TheDeterminator determinator]]. When Marco approached her with her first mission, she can't help but [[JumpedAtTheCall jump on it]].
* ForGreatJustice: She was chosen from numerous candidates due to her passion for justice and becoming a hero.
* OnlyTheChosenMayWield: It is said that few are able to use the armor. [[CaptainObvious Perche is one of them]].
[[/folder]]

[[folder:Nikita]]
[[quoteright:228:http://static.tvtropes.org/pmwiki/pub/images/msa_nikita.png]]
A female officer with strong leadership skills, takes command of a modified Di-Cokka tank with enhanced firepower.

* CallingYourAttacks: Does this with a swing of her baton before firing. Her special attack even has a {{beat}} before she does this.
* TheEnemyWeaponsAreBetter: A Regular Army officer who commands a modified Di-Cokka tank that's usually a Rebel Army vehicle.
* {{Expy}}: Her appearance and being in a tank may give the impression of Anchovy from Anime/GirlsUndPanzer.
* GunsAkimbo: Instead of a single cannon, Nikita's Di-Cokka has two.
* JustAKid: Sort of a BerserkButton as she dislikes being treated as such. Practically her motivation to rise up the ranks so she can treated seriously.
* LawOfInverseRecoil: Nikita is often rocked back and forth every time her tank fires a shot.
* NonIdleRich: It's noted that she comes from a famous family and has many connections but refuses to rely on them, preferring to put in the effort herself.
* ScrewThisImOuttaHere: Calls a Regular Helicopter to save her. Her ditched Di-Cokka is then sent careening towards the enemy forces.
* SmallGirlBigGun: Downplayed. Her stature is small but her Di-Cokka tank is the size of a Metal Slug, that is equipped with a WaveMotionGun.
* TankGoodness: Rides a modified Di-Cokka tank.
* UpThroughTheRanks: It's stated that due to her skills, she's able to rapidly do this to the point where the top brass have trouble keeping up with her speedy and flexible tactics.
* WaveMotionGun: Her Solenoid Cannon special attack, that can be described as a smaller and faster version of Tani Oh's Andro Cannon.
* WeaponForIntimidation: Holds a baton (with a bow on it) to make herself more serious.
[[/folder]]

[[folder:Reika Bradford]]
[[quoteright:144:http://static.tvtropes.org/pmwiki/pub/images/msa_reika.png]]
A member of the famed and talented Bradford family. She attacks with various weapons stored inside her robes.

* ParasolOfPrettiness: With a shotgun acting as the handle. [[LuckilyMyShieldWillProtectMe It also works as a shield.]]
* ShortRangeShotgun: Unless she uses her special, in which the damage given travels way farther than the animation shows.
* TakingYouWithMe: Runs towards her enemies with a dynamite on hand.
* TrenchCoatWarfare: Carries a landmine, a bomb, a [[GatlingGood Gatling gun]], and a bazooka. She attacks in the respective order.
* TheRival: To Fio, due to Reika's family often being compared to hers.
[[/folder]]

!!Rebel Army

[[folder:Abigail]]
[[quoteright:156:http://static.tvtropes.org/pmwiki/pub/images/msa_abigail.png]]
An officer of the Rebel Army.

* AttackDrone: Accompanied by four floating cubes that fire FrickinLaserBeams.
* BrokenPedestal: Was a student of Ariadna who she looked up to. She feels betrayed after founding out her affiliation with the Martians after her disappearance.
* CoolBigSis: To Beatriz.
* EasterEgg: Winning a battle with Trevor showing up on either the player or opponent's deck will cause her to furiously blush while a thought bubble of Trevor appears above her.
* EvilLaugh: Part of her special attack and victory pose, although it comes out silent. It is heard when using the Spacey Nokana's special attack.
* FrickinLaserBeams: Her weapon of choice present in her attack drones and her personalized Nokana.
* ICallItVera: Spacey Nokana, named after Abigail's crush.
* InSeriesNickname: Abby.
* RageAgainstTheMentor: Had to put aside her previous feelings for her former mentor and reminds herself anyone who is against the Rebel Army is an enemy to her.
* SkirtOverSlacks
* SmoochOfVictory: Convinced Trevor to let her give him one if [[EnemyMine they team up]] to save the captured Mars People from the other armies. Since they got interrupted by a rampaged Rootmars, Abigail took the opportunity to give a kiss on a fainted Trevor's neck.
* TankGoodness: Has her own Iron Nokana tank with a laser cannon in the belly.
* TheGlassesComeOff: Her office attire in her concept art has her wearing glasses, which she is not a fan of. She uses contacts when in battle.
* VillainousCrush: With Trevor Spacey. Goes to a whole new level with the Spacey Nokana, with the name and color based on Trevor.
* [[YouGottaHaveBlueHair You Gotta Have Pink Hair]]
* WalkingSwimsuitScene: Her "Everlasting Summer" variant. She's dressed in a bikini in order to teach her sister how to swim. Her description implies that she hopes Trevor will come to the beach and see her (he does, but for work related reasons).
[[/folder]]

[[folder:Beatriz]]
[[quoteright:210:http://static.tvtropes.org/pmwiki/pub/images/msa_beatriz.png]]
A chief of the Rebel Army and Abigail's sister. Idolized by the rebel solders, they serve as bodyguards for her.

* BigSisterWorship: Puts her sister Abigail in high regard. Turns into a bit of a ClingyJealousGirl when Abigail's VillainousCrush Trevor is either present or brought up.
* BitchInSheepsClothing: Despite her appearance, she can be ruthless to anyone except for her sister Abigail. Her close range attack consists of freezing one of her bodyguards and using them as a shield.
* DisproportionateRetribution: In one of her victory poses (chosen at random), Beatriz will toss a bomb on her servant if he gives her a carrot.
* DoesNotLikeSpam: Dislikes carrots. Anyone who brings her one is a victim of the above.
* DummiedOut: Her Eternal Summer form has all of her sprites redrawn into her new beach clothes, even though her victory animation is new and she only has two attacks instead of three.
* FrickinLaserBeams: Ice beams from her FreezeRay.
* InSeriesNickname: Betty, although Abigail calls her "Beaty".
* KillItWithIce: Her ice gun is able to transform defeated living and non-living units into snowmen and ice blocks respectively.
* MookMaker: A new variant has her rushing out to fight without any weapons. So instead she pulls out Bodyguard-class soldiers out of nowhere.
* PantyShot: Seen in her death animation.
* PraetorianGuard: The black/dark grey rebel soldiers show up beside Beatriz to give out weapons on command. The grey soldiers are actual units a player can deploy and are essentially beefed up versions of the normal Rebel Soldier, Sniper, and Shield Soldier.
* PureIsNotGood: Her deep love for her sister Abigail apparently deems her heart pure, according to the Pharaoh. She is still part of the evil Rebel Army.
* SiblingTeam: Downplayed, both sisters are placed in different teams (Abigail in "One-Way" and Beatriz in "Queen's Battle").
* TankGoodness: Later owns her own personalised Iron Nokana like her sister, dubbed "Sister Nokana" which has its underbelly cannon modified to be a freeze ray.
* TeethClenchedTeamwork: Whenever she works with Allen Jr.
* ZettaiRyouiki: Rank A. She wears pink socks in her normal form and white socks for her special form.
[[/folder]]

[[folder:Vita]]
[[quoteright:132:http://static.tvtropes.org/pmwiki/pub/images/msa_vita.png]]
A soldier of the Rebel Army. Apparently suffered harsh casualties on that she had to be fixed.

* ArtificialLimbs: She later loses most of her limbs some time in the future.
* BreastExpansion: According to her concept art, she's been given a bust increase when she became a cyborg.
* {{Cyborg}}: Complete with a robotic voice. Vita's head is the only organic part of her new body.
* CustomUniform: Wears a frilly dress rather than a standard Rebel uniform.
* EyeScream: Has an eyepatch on her left eye that is surrounded by burn marks.
* FrickinLaserBeams:
** Coming out of her ''[[ElectronicEyes right eye]]'' [[note]]possibly a spriting error, as her laser eye is fully implied to be the one covered by her eyepatch[[/note]] and landing in front of her. Unlocking her fourth skill will drag the laser up to the air.
** Her special form's long-range attack is a spread of laser beams, while her special is a large explosion in front of her.
* ImmortalityBeginsAtTwenty: While it is never specified what year the Future Rebels live in, Vita never aged ever since she's been stuck in the tube.
* LighterAndSofter: Her special form's art and sprites were given a less menacing look.
* MadeOfExplodium: Her death animation has her malfunctioning and blowing up, dealing some damage to opposing units in the explosion's vicinity.
* MagicSkirt: Subverted. When her special form lands down from her flight, her underwear can be seen.
* MulticoloredHair: Originally all pink, but her left side lost its color to a burnt blonde.
* PeopleJars: Seen in Nova's winning animation.
* ShellShockedVeteran: Due to her friends being killed in a war.
* UnwantedRevival: Was once bothered that Navy had the nerve to bring her back to life after what she experienced. Vita later mellows out of the predicament.
* UseYourHead: How she leads the final blow in her close-range attack.
* WeCanRebuildHim: Given the ability to float, charge forward with great speed, and a laser eye; not everything of her has been fixed though.
[[/folder]]

[[folder:Navy]]
[[quoteright:122:http://static.tvtropes.org/pmwiki/pub/images/msa_navy.png]]
A researcher who earned a spot at the top of the Rebel Army's Science division after she helped rebuild Vita.

* AnimeHair: Very spiky and two-toned (pink and green).
* AttackDrone: The little rotor-equipped things hovering around her are actually ''ammunition'' for her gun.
* CombatMedic: Heals her teammates with the pink vial while poisoning her opponents with the green one.
* CoolShades
* [[HoistByHisOwnPetard Hoist by Her Own Petard]]: She chokes on her own poison in her death animation.
* TheHyena: Laughs ''constantly''. Fortunately, most of it comes quiet.
* MasterPoisoner: Her green vial explodes in a poisonous gas.
* MulticoloredHair: Green and pinks hues relating to her colored vials.
* TeethClenchedTeamwork: Navy did not have a great relationship with the Professor when the latter was still part of the Rebel Army.
* VocalDissonance: Speaks in a squeaky manner.
[[/folder]]

[[folder:Nova]]
[[quoteright:204:http://static.tvtropes.org/pmwiki/pub/images/msa_nova.png]]
[[caption-width-right:204:Future Vita and Nova]]
A Future Rebel who is a robotic clone of Vita.

* ArtificialHuman: A clone of Vita. Nova's appearance is based on Vita before her injuries.
* EnhancedPunch: Her close range attack is throwing an electrical uppercut.
* FrickinLaserBeams: Her special is a short beam coming out of her eyes with an explosive effect afterwards.
* MadeOfExplodium: Explodes once her health has been depleted.
* RoundhouseKick: Her long range attack. It can be applied to her special attack once her proper skill is unlocked.
[[/folder]]

[[folder:Destrade]]
[[quoteright:189:http://static.tvtropes.org/pmwiki/pub/images/msa_destrade.png]]
A mercenary who now works for the Rebel Army, scouted by Allen O'Neil. Weilds a giant robotic arm in one hand and a pistol in another hand.

* AmazonianBeauty: Her build as a "fully ripped body" that even Allen himself acknowledges. Even strengthens her muscles daily.
* MamaBear: Is like this in the Extra Ops story "No Limit", where she respects and cares for the devil sergeant Allen O'Neil. But will show no mercy for those that harm him.
* PowerFist
* RocketPunch: Quite literally as her special attack.
* {{Stripperific}}: Compared much to Dragunov in a sense, Destrade is literally this with just a bikini, but with metal shoulder pads and knee high boots.
[[/folder]]

[[folder:Shizuka]]
[[quoteright:100:http://static.tvtropes.org/pmwiki/pub/images/msa_shizuka_out.png]]
A hired ninja and personal bodyguard for Abul Abbas. Has a thing for sweets and had connections with Yoshino in the past.

* BodyguardBabes: Abul's personal female ninja bodyguard.
** BodyguardingABadass: It's debatable how badass Abul is, though his Special variant (which she is paired with) is definitely no slouch.
* HairDecorations: A large flower on her head.
* TheRival: To Yoshino, both once trained in the same village they lived in.
* StraightMan: Compared to Abul and Aisha.
* SweetTooth: Her in-game description states that she takes her smartphone out and looks up new sweets online. True to the description, it is shown in her victory animation, with a cupcake in a thought bubble.
[[/folder]]

[[folder:Rapid]]
[[quoteright:108:http://static.tvtropes.org/pmwiki/pub/images/msa_rapid.png]]
A Rebel Supply officer who makes the trains run on time.

* EvilCounterpart: For a given value of 'Evil'. She doesn't seem to bad herself, but she ''does'' fight for the Rebel Army. She's the counterpart for Sisilia and the Aikawa Sisters, but her unit is far more offensive in nature.
* ShesGotLegs
* TakingYouWithMe: Though she retreats rather than die, her fourth skill is when her subway car's HP drops to 0, Rapid promptly sends said subway car into a suicide attack towards the enemy.
* WeaponizedCar: Straps a cannon to the top of her subway car.
[[/folder]]

[[folder:Huracan]]
[[quoteright:183:http://static.tvtropes.org/pmwiki/pub/images/msa_huracan.png]]
This bow-wielding warrior single-handedly fought off a Morden army detachment, then joined them in exchange for their leaving her village alone.

* {{BFG}}: Her bowgun looks like it would be more at home in VideoGame/MonsterHunter.
* BloodKnight: Joining the Rebels and continuing to fight suits her just fine.
* NiceJobBreakingItHero: She killed a bear that was driven to frenzy and attacking her villages by a drought, only to find out that it's presence kept a sizable pack of wolves at bay.
* NubileSavage: Albeit dressed in a more military outfit version of the usual garb.
* PistolWhip: Yes, she will smack you with her bowgun up close.
[[/folder]]

[[folder:Aisha]]
[[quoteright:123:http://static.tvtropes.org/pmwiki/pub/images/msa_aisha.png]]
A new recruit for Abul Abbas.

* {{Stripperiffic}}: Dresses like a belly dancer, veil and all.
* SwordBeam: Her special is spamming these.
[[/folder]]

[[folder:Julia]]
[[quoteright:126:http://static.tvtropes.org/pmwiki/pub/images/msa_julia.png]]
A female Rebel Army officer who is often deployed with Allen Jr..

* BadassDriver: Rides her own MV-280 Jeep into battle, armed with a machine gun identical to Allen's and lots of grenades.
* GrenadeSpam: Her special is this while she shouts a few [[BigYES big "YES!"es]].
* ShipTease: With Allen Jr.. She's often deployed with him, they're paired as a team in-game and she utilises a machine gun that's identical to his (and his father's). Though its exact nature is unknown, there are many rumors about their relationship.
* {{Stripperiffic}}: Her attire merely consists of a torn tank top (if you call that a tank top) and [[WhoWearsShortShorts very short shorts.]]
[[/folder]]

[[folder:Chloe]]
[[quoteright:141:http://static.tvtropes.org/pmwiki/pub/images/msa_chloe.png]]
A Rebel Army transportation officer.

* FrickinLaserBeams: A large one under the cockpit.
* TheKnightsWhoSaySquee: Has a large amount of respect for Rapid and hopes they be friends one day.
* OhCrap: Freaks out when her aircraft starts exploding around her.
* [[YouGottaHaveBlueHair You Gotta Have Purple Hair]]
[[/folder]]

[[folder:Izabella]]
[[quoteright:177:http://static.tvtropes.org/pmwiki/pub/images/msa_izabella.png]]
Lady in charge of the Rebel Army prison sector. She and Navy know each other well and are friendly to each other.

* TheDreaded
* {{Sadist}}
* VillainTakesAnInterest: Its said that Izabella has a bad habit of spoiling prisoners she takes a liking to. This occurs when she went on the hunt for Sisilia.
* WhipItGood: Wields a whip that extends as well as produces thorns.
[[/folder]]

!!Ptolemaic Army

[[folder:As A Whole]]
* FireForgedFriends: Though they tend to bicker, Dragunov, Yoshino and Caroline are this in the heat of battle. An encounter with Allen O'Neil forced Dragunov to pull a TakingTheBullet to protect Caroline and was forced to take her to safety on Yoshino's orders, leaving her to fight Allen.
* ScarfOfAsskicking: Most of the Ptolemaic girls wear a red scarf. Caroline confuses Scotia for one of their own because of her scarf.
[[/folder]]

[[folder:Dragunov]]
[[quoteright:108:http://static.tvtropes.org/pmwiki/pub/images/msa_dragunov.png]]
A commander of the Ptolemaic Army.

* AuthorityEqualsAsskicking: Is a strict military commander of the Ptolemaic Army and wields a large-caliber sniper rifle that deals heavy damage to enemies.
* BeautyIsNeverTarnished: Zig-zagged. Her in-game art shows she has no visible scars aside from her eye (and injuries sustained during Another Story are only known through dialogue). But this [[https://pbs.twimg.com/media/DInvZD9VoAA067H.jpg concept art]] portrays her being CoveredInScars.
* {{BFG}}: Wields an anti-material rifle.
* DeathFromAbove: Her original unit snipes from atop a hover unit. Lowering her HP will lead to Dragunov dropping her vehicle onto the opposing army.
* DoppelgangerAttack: Her "Special Dragunov" form/unit. Only equipped with a combat knife, her long range attack involves sending shadow clones at her enemies, slicing them with said knife. Her special attack sends a long barrage of these in succession which ends with a point-blank explosion she personally performs.
* TheDeterminator: Unlocking her fourth skill allows her to keep fighting on foot with part of her original HP.
* {{Expy}}: Given the choice of clothes (bikini top and low-hanging pants), gun (the muzzle resembles a Barrett .50), her hair, and how curvy she is, as well as her choice of colored hover unit, she can be seen as an expy of ''Anime/TengenToppaGurrenLagann's'' Yoko Littner.
* EyeScream: Has a scar on her left eye that seems to be permanently shut.
* FeudEpisode: So far, twice with Veronica over who would be the pilot of a recently upgraded Union vehicle. Both times, Sisilia had to break up the two.
* FrickinLaserBeams: Her hover unit's special attack.
* KnifeNut: When not using her sniper rifle, she is this. Complete with ReverseGrip.
* {{Stripperific}}: Compared to the rest of the army, who most are completely covered, she wears a bikini and low-hanging pants. She drops the pants altogether for her [[WalkingSwimsuitScene Everlasting Summer variant]].
[[/folder]]

[[folder:Yoshino]]
[[quoteright:136:http://static.tvtropes.org/pmwiki/pub/images/msa_yoshino.png]]
A female Ptolemaic martial arts instructor who happens to wield a giant hammer.

* AmazonianBeauty: Her character illustration shows off her muscles pretty well. And she needs them to swing that hammer.
* CounterAttack: Teleports to the front of the opposing army and slams her hammer.
* DropTheHammer: Her main weapon, its bigger than she is.
* [[GasMaskMooks Gas Mask Mook]]: As part of belonging with the Ptolemaic Army's Special Forces section. If she gets knocked back, her mask flies off her face, making her mask-less for the duration of the battle.
* {{Gainaxing}}: Shown during her walking animation.
* LeotardOfPower: Her [[WalkingSwimsuitScene Everlasting Summer]] variant has her don a leotard swimsuit, which shows off her [[ShesGotLegs muscular legs]].
* LuckilyMyShieldWillProtectMe: Her special attack finishes off with her hammer acting as a shield for a few moments, deflecting enemy damage from the team.
* MadeOfIron: In the second Ptolemaic Another Story, she takes on two Super-Heavy tanks (Shoe and Karn) while still suffering from the wounds she took fighting Red Goblin.
* ReasonableAuthorityFigure: She is more forgivable than the strict Dragunov depending on the circumstances. Ask Abul Abbas.
* SensualSpandex: She clearly shows it off to the player.
* ShockwaveStomp: The aftermath after slamming her hammer by her special attack.
[[/folder]]

[[folder:Caroline]]
[[quoteright:105:http://static.tvtropes.org/pmwiki/pub/images/msa_caroline.png]]
A mechanic of the Ptolemaic Army. Caroline controls the F-502 [=ShootingRay=], the plane boss from the second mission of ''Metal Slug 5''. She later controls a miniature version of the Jupiter Queen. Later on, she pilots her own variant of the Augensterm, in red.

* AttackDrone: Usually uses remote-controlled weapons.
* DeathFromAbove: The plane's standard attack.
* FunSize: The original [=ShootingRay=] was modeled after would not fit the screen at its wingspan in ''Metal Slug 5''. Here, it's a similar length to the Hairbuster Riberts.
* GadgeteerGenius: Created the [=ShootingRay=] all of her own; Yoshino calls Caroline the "Mechageek".
* GirlyGirlWithATomboyStreak: The most girly of the army, but she actively goes to the battlefield with her inventions.
* ImprovisedWeapon: Attacks with her controller as a close range attack.
* PluckyComicRelief: When not in battle, Caroline is the most expressive of the expanded cast, being the main host of various comedic moments.
* ScrewThisImOuttaHere: If her controlled weapon explodes before she dies, Caroline will [[RageQuit throw a tantrum and stomp back to base]].
* TakingYouWithMe: Unlocking her fourth skill allows the plane to do a suicide attack whenever it or Caroline loses all of their HP.
* TankTopTomboy
* WrenchWench: Loves machinery. When she sees Big Shiee for the first time, she wants it for herself. Her own story has her going AWOL (technically, she left a Leave request, but never actually turned it in) to get at a Crablops.
[[/folder]]

[[folder:Veronica]]
[[quoteright:144:http://static.tvtropes.org/pmwiki/pub/images/msa_veronica.png]]
A member of the Ptolemaic Special Forces.

* AbsoluteCleavage: Her bodysuit is unzipped all the way down, complete with VaporWear [[note]]Though the way her bodysuit is opened in her artwork implies [[BarbieDollAnatomy she somehow manages not showing any nipples]][[/note]].
* BoyishShortHair: [[YouGottaHaveBlueHair Green colored]].
* BikerBabe: Her bike is her form of travel and weaponry. She tinkers with it during her spare time.
* CaptainErsatz: Wears a tight leather [[ComicBook/{{Catwoman}} cat-]] er, riding suit, and the design of that bike looks ''[[Film/TheDarkKnight awfully]]'' [[Film/TheDarkKnightRises familiar]]...
* DistaffCounterpart: To Tarma, in terms of their affinity to motorbikes.
* FeudEpisode: So far, twice with Dragunov over who would be the pilot of a recently upgraded Union vehicle. Both times, Sisilia had to break up the two.
* GasMaskMooks: Unlike Yoshino, she temporarily wears one whenever she throws her gas grenades.
* MasterPoisoner: Units caught by her gas grenades are poisoned and continuously take damage for a few seconds.
* WeaponizedCar: Her motorbike has a gun and missile launcher at the front.
[[/folder]]

[[folder:Sisilia]]
[[quoteright:129:http://static.tvtropes.org/pmwiki/pub/images/msa_sisilia.png]]
A member of the Ptolemaic Army Supply Corps who always holds and plays her trumpet.

* BrownNote: Her close range attack is a loud blast from her trumpet.
* CoolBike: Downplayed. It's a standard bicycle compared to Veronica's motorbike.
* {{Expy}}: A Ptolemaic version of Rumi.
* {{Fanfare}}: Plays a silent one on her victory animation.
* HeroicSecondWind: During "Sadistic Emotion" Extra Ops, she uses her trumpet to revitalise Veronica and Dragunov who not too long ago were defeated by Izabella and Navy, allowing them to rescue her and escape.
* SayMyName: Shouts "Veronica!" at her defeat.
* ScrewThisImOuttaHere: Once she's knocked off of her bike, she runs away scared.
* SpellMyNameWithAnS" Pronouncing her name sounds more like it should be spelled "Cecilia".
* StuffBlowingUp: Her long range attack is tossing grenades from her bag.
* SupportPartyMember: Like the Aikawa sisters, this is her role in her respective army, using her trumpet to motivate her comrades to victory. Her special attack has her use her trumpet to produce pickups that either allows her allies to recharge their special attacks, buff them or in the case of her Special form, heal them.
* TheLastOfTheseIsNotLikeTheOthers: Her appearance is quite unfitting compared to the rest of the army, looking more like a Creator/StudioGhibli heroine.
[[/folder]]

[[folder:Towa]]
[[quoteright:180:http://static.tvtropes.org/pmwiki/pub/images/msa_towa.png]]
A mechanic of the Ptolemaic Army. Originally an independent, she was forced to join after being caught stealing the army's supplies.

* DisproportionateRetribution: If Caroline didn't come in and intervene, Towa would've been executed by Dragunov for stealing the army's supplies.
* HeterosexualLifePartners: With Caroline. Dragunov and Yoshino are disgusted seeing the two being obnoxiously sweet to each other.
* JoinOrDie: And she wouldn't even have had the choice had Caroline not stepped in.
* {{Meganekko}}: Can rival Fio in both their character and glasses.
* RegeneratingHealth: Gains HP every once in a while. More HP is gained if assist units are placed on the same deck as Towa.
* ThisIsADrill: Her mech has two drill for hands. Her special attack is lunging an enlarged drill.
[[/folder]]

[[folder:Mira]]
[[quoteright:140:http://static.tvtropes.org/pmwiki/pub/images/msa_mira.png]]
A high ranked wizard of the Ptolemaic Army. A target of suspicion by the Masked Soldiers due to her powers.

* TheDragon: Presumably to Ptolemaios, as he gives command of the Masked Soldiers to Mira to fend off the intruding Rebel Army.
* KnightOfCerebus: The most serious of the Ptolemaic crew.
* MalevolentMaskedMan: Wears a mask to cover her face. When she takes it off, only part of her face can be seen.
* RedEyesTakeWarning: Her eyes appear red when she wears the mask.
* {{Underboobs}}: A large opening in the front of her suit reveals this and [[BareYourMidriff her midriff]].
[[/folder]]

[[folder:Simon]]
[[quoteright:123:http://static.tvtropes.org/pmwiki/pub/images/msa_simon.png]]
A sniper scouted by Dragunov.

* {{BFG}}: Her dark pink sniper is longer than she is tall.
* GenderBlenderName: A male name on a female.
* IneffectualLoner: Tends to work alone since she hates noise. When her punishment for not following orders and pointing her gun at Dragunov is a trip to the solitary confinement room, Simon asks if it's quiet in there (and then hopes she gets in as soon as possible).
* LaserGuidedAmnesia: Her memories were removed during secret tests by the Ptolemaic Army.
* LeotardOfPower: Her suit has cutouts on her inner thighs.
[[/folder]]

[[folder:Anastasia IV]]
[[quoteright:222:http://static.tvtropes.org/pmwiki/pub/images/msa_anastasia.png]]
A priestess of an unknown sect. Joined forces with Ptolemaios as to protect their hidden treasure.

* {{Cult}}: Has her own similar to her ally Ptolemaios, though their themes are very different.
* FrickinLaserBeams: Her normal attack has her 4 followers shoot a stream of laser fire each while her special attack has her summon a very large laser attack from her staff.
* LightIsNotGood: Has the image of a holy maiden, whose allied with one of the [[BigBad big bads]] of the Metal Slug series, Ptolemaios.
* OhCrap: Has this reaction when her throne begins to explode when defeated.
* YouGottaHaveBlueHair: Long green hair.
[[/folder]]

[[folder:Miharu]]
[[quoteright:130:http://static.tvtropes.org/pmwiki/pub/images/msa_miharu.png]]
A wandering mercenary who joined the Ptolemaic Army after Yoshino improved her combat skills as her student.

* JigglePhysics: Her idle animation.
* MixAndMatchWeapon: Her gun lance, made by the same craftsman who made Yoshino's huge hammer. Its a BladeOnAStick with a gun attachment that inflicts lots of damage but only at close range.
* MsFanservice: Big time. Her pants are as low as Dragunov's and has her chest in the open, showing off her voluptuous figure.
* SpinToDeflectStuff: She is able to completely nullify any ranged projectiles as she spins her lance as she walks. She can still take damage from explosive attacks however and she stops spinning her lance once she reaches an enemy at melee range.
* YouGottaHaveBlueHair: Long silver-blue hair tied in a ponytail.
[[/folder]]

[[folder:Chunyan]]
[[quoteright:108:http://static.tvtropes.org/pmwiki/pub/images/msa_chunyan.png]]
A daughter of a famous chef who was rescued from an assailant. She was invited to join the army but not for her powers.

* BareYourMidriff
* BigEater: Unlike Nadia, Chunyan is able to control her weight while enjoying her food.
* ElementalBarrier: Her special is lifting the ground a few yards from her. The protruding rocks serve as a standalone shield.
* RoseHairedSweetie: She doesn't mind fighting for the army as long as she has her love of cooking.
* TeamChef: The main reason they invited her. Dragunov in particular loses her stoicness after eating Chunyan's food.
* TrademarkFavoriteFood: Meat buns.
[[/folder]]

!!Space Army
!!!Martians
[[folder:Professor]]
[[quoteright:146:http://static.tvtropes.org/pmwiki/pub/images/msa_professor.png]]
A scientist who worked for the Rebel Army before affiliating with the Mars People.

* AmbiguousGender: Due to the Professor cloning so much, it becomes difficult to determine what gender the Professor is supposed to be.
* DeadlyDisc: The Professor's special is bringing a laser saw that pierces through enemies in a certain area.
* HeelFaceTurn: Despite moving to another enemy faction, the Professor is insistent to destroy the Rebel Army and their weapons.
* IdiotHair: The largest cowlick in the series, beating out Eri's.
* LittleGreenMen: Probably used the same cloning properties as the player clones from ''Metal Slug 3'', causing the skin to turn green. The Professor is also slightly shorter than the rest of the human units.
* VagueAge: Being from the future, it is unknown how long the Professor has lived throughout the various clones.
* WhyDontYouJustShootHim: Inverted and subverted. Anytime the Professor is thwarted in the Extra Ops, the assailant is immediately ready to take him out until one of the Professor's comrades comes in to save him.
[[/folder]]

[[folder: Marty (Mars Person Neo)]]
[[quoteright:144:http://static.tvtropes.org/pmwiki/pub/images/msa_marty.png]]
A Martian who befriended the Professor.

* LawOfChromaticSuperiority: His Neo form is purple. Neo Mars People also give out the most energy, which the Rebels use to power the Big Gate.
* ThePowerOfFriendship: Evolves into a more powerful form out of his desire to help the Professor.
[[/folder]]

[[folder:Percier]]
[[quoteright:150:http://static.tvtropes.org/pmwiki/pub/images/msa_percier.png]]
The Professor's "eternal assistant" when they were once working for the Rebel Army. She also dresses up as a Mars Person.

* TheBore: A reason why the Professor doesn't take much interest in her.
* ClingyJealousGirl: Doesn't get along well with Marty when she finds out he is the Professor's new assistant.
* DressingAsTheEnemy: Dresses up as a Mars Person and speaks their language to combat the actual ones the Professor has an affinity for.
* EarlyBirdCameo: Makes her first appearance in the "Mad Scientists" event before fleshing out her personality in Another Story.
* ExpressiveShirt: Her costume's eyes bulge out when she's attacking similar to the Mars People.
* RememberTheNewGuy: Unlike the other newcomers, she makes her debut in an event starring someone else (Navy in this case) before becoming a unit.
* SelfProclaimedLoveInterest: "Eternal assistant", as she puts it.
* [[YouGottaHaveBlueHair You Gotta Have Green Hair]]
[[/folder]]

[[folder:Clone Abby]]
[[quoteright:142:http://static.tvtropes.org/pmwiki/pub/images/msa_cloneabby.png]]
A robotic clone of Abigail created by the Professor. He designed her to combat Vita.

* BoldInflation: In the Japanese language, her name is kept in English. Her name is also in full caps in [=SNK=]'s descriptions.
* EvilKnockoff: While Abigail is already part of an evil army, Clone Abby strips off any sort of emotion the original has.
* FrickinLaserBeams: Coming out of her two large laser guns.
* GreenSkinnedSpaceBabe: Her green skin is a standard for the Martian clones.
* LeotardOfPower
* YouGottaHaveBlueHair: Compared to Abigail's pink.
[[/folder]]

[[folder:Clone Betty]]
[[quoteright:147:http://static.tvtropes.org/pmwiki/pub/images/msa_clonebetty.png]]
A robotic clone of Beatriz created by the Professor.

* AnIcePerson: Has a rechargeable FreezeRay floating behind her back, and she is able to breathe ice on the closest unit.
* DeathFromAbove: Sends small satellites that drop large chunks of ice.
* GreenSkinnedSpaceBabe: A Martian standard.
* OutOfFocus: From her Extra Ops, as it's mostly delegated to the Martian Rangers. Her contribution to the story is the Professor's discovery of White Baby.
* RedEyesTakeWarning: Big red eyes compared to Clone Abigail.
* YouGottaHaveBlueHair: Compared to Beatriz's pink.
[[/folder]]

[[folder:Ariadna]]
[[quoteright:178:http://static.tvtropes.org/pmwiki/pub/images/msa_ariadna.png]]
A former commanding officer of the Rebel Army. She joined the Martians after being unwittingly experimented on by the Professor.

* {{BFG}}: A large cannon gun. It's as big as she is if not bigger and uses it as a battering ram at close range.
* BigBrotherMentor: Likely had this relationship in her previous life with Abigail as the student. Makes Abby's reaction to her former mentor being her latest enemy all the more poignant.
* DefrostingIceQueen: A result of the Professor removing her past.
* HeelFaceTurn: Ariadna stayed at the Rebel base after her experimentations, but she eventually joined the Martians after feeling uninterested by the ongoing human conflicts.
* HulkingOut: She possesses superhuman abilities when an electric signal is received.
* LaserGuidedAmnesia: While the Professor removed most of her memories, Ariadna is aware of her former Rebel Army colleagues.
* ThatManIsDead: At the end of her Extra Ops, she outright tells Abigail that she is no longer the mentor she knew before.
* SempaiKohai: Ariadna (sempai) to Abigail (kouhai). Abigail's reaction to seeing Ariadna alive and betraying her is to eventually make herself stronger than her teacher.
* SurpassedTheTeacher: What Ariadna looks forward to from her former student, Abigail.
[[/folder]]

!!!Invaders
A different set of the Space "Faction" of the game, the Invaders were the bad guys in ''Metal Slug 6''.

[[folder:As A Whole]]
* AliensSpeakingEnglish: Unlike the Mars People, the Invaders are able to speak perfect English without the use of a translator.
* CombatTentacles: Everyone except Lydia and Fedeln are able to transform a limb of their body into a weapon.
* EldritchAbomination: Their true selves are not known to the player. Even when Nowan is in the middle of transforming, all the player sees is a purple ball of goo.
* ManOnFire: Their general death animation except Fedeln has them burst into blue flames.
* TheyLookLikeUsNow: Their special ability is to transform into Earthlings. Schwarz is a parasite on a host and Fedeln is a humanoid.
* YouGottaHaveBlueHair: Excluding Nowan, since he has advanced transformation abilities.
[[/folder]]

[[folder:Odette]]
[[quoteright:117:http://static.tvtropes.org/pmwiki/pub/images/msa_odette.png]]
A [[HumanAliens human Invader]] whose task is to investigate life-forms being energy affected by the [[BackFromTheDead Sol Dae Rokker Anima]].

* CombatTentacles: She can transform her arms to tentacles to whip her enemies to death.
* GirlishPigtails
* HeadPet: Her "Everlasting Summer" variant has a small bird on her head. Given their nature, it may be a part of her.
* HornedHairdo: Her pigtails will raise into horns when she does her attacks.
* HumanAliens: Odette only transforms her arms in order to keep her true form secret.
* ManOnFire: Her death animation.
* MellowFellow: When not attacking, Odette is rather laid-back. She yawns when idle, hides her face when knocked back and just bobs left and right during a victory. It's likely this is the reason why Annette was forced to come to Earth to check on her.
* RedEyesTakeWarning: Her eyes are red as well widen when she attacks.
* RedOniBlueOni: Blue to Annette's Red.
[[/folder]]

[[folder:Annette]]
[[quoteright:135:http://static.tvtropes.org/pmwiki/pub/images/msa_annette.png]]
An inventress of the Invaders. Came to Earth after being annoyed by the status of Odette's investigation.

* AnnoyingYoungerSibling: She finds Odette's laid-back behavior bothersome and often reminds her to do her job.
* CombatTentacles: Unlike Odette, Annette is able to transform her tentacles into claws or a heavy pile of goo. In her holiday suit, she extends the attack with a gooey Christmas tree.
* ImpossiblyLowNeckline
* LettingHerHairDown: Her Christmas Variant has her hair loose.
* MsFanservice: With probably the largest bust of the entire series and doesn't mind showing it off, she goes for a more refined style of dress, however.
* MamaBear: Do NOT mess will Odette. She will make you regret it.
* ManOnFire: Her death animation.
* OutOfCharacterMoment: She softens when communicating with Odette in secret. The reason Annette's arrogant is to avoid revealing to other Invaders that she and Odette are sisters.
* RedEyesTakeWarning: Her naturally red eyes widen as she attacks.
* RedOniBlueOni: Red to Odette's Blue.
* TheyLookLikeUsNow: Wears an outfit similar to the Masked Soldiers (without the mask).
* ThisIsADrill: Similar to Odette's special attack except it travels horizontally.
[[/folder]]

[[folder:Lydia]]
[[quoteright:102:http://static.tvtropes.org/pmwiki/pub/images/msa_lydia.png]]
A spy of the Invaders who is accompanying Annette. She disguises herself as a Regular Army solder.

* HomingProjectile: Sometimes circles around a spot where a unit may pop up (like the Aeshi Nero).
* MacrossMissileMassacre: Shoots more rocket missles than Red Eye.
* TheMole: As a Sparrows unit, although she is never seen interacting with the Regular Army.
* PaletteSwap: Looks like Red Eye (who is a swap of Fio herself) with purple clothes and green hair.
* [[YouGottaHaveBlueHair You Gotta Have Green Hair]]
[[/folder]]

[[folder:Nowan]]
[[quoteright:120:http://static.tvtropes.org/pmwiki/pub/images/msa_nowan.png]]
An Invader with impressive shape shifting powers.

* AmbiguousGender: Even Nowan doesn't know what gender she is. Everyone refers to Nowan as a "he", although in later updates the game calls Nowan a "she".
* {{Bifauxnen}}: Later updates has Nowan referred to as a woman. Nowan's short hair and suit can be mistaken for a man.
* ImposterForgotOneDetail: Her impressions require more work. Allen Jr. caught Nowan's bluff when the former said his father laughs with an extra "ha" in the end.
* NotQuiteFlight: Produces a set of wings to leap forward. Nowan also hovers during her winning animation.
* PunnyName: Pronounced as "No One".
* TeethClenchedTeamwork: Hates working with the Metzelei.
* ShapeshifterDefaultForm: Her normal form is taken from a human she met long ago. This explains why her style looks different from her peers.
* ShapeshifterWeapon: Nowan is able to turn her limbs into spears, deploy gliding membranes from her back, turn herself into other characters (Allen O'Neil, Jin, Lightning Fio, and Beatriz) with their weapons in hand, and can even turn into a fully functioning ''Sand Marine''.
* VoluntaryShapeshifting: Is able to perfectly transform into anything. Gotten to the point that Nowan can't remember how she looked like, how old she is, or if she had a different name.
[[/folder]]

[[folder:Schwarz Metzelei]]
[[quoteright:140:http://static.tvtropes.org/pmwiki/pub/images/msa_metzelei.png]]
One of the Top Four in the Invaders' Army. Attacks with her large tail.

* BewareMyStingerTail: Considering that it seems to count for half her mass, that might be a good idea.
* BlueAndOrangeMorality: Her only deal is to eat whatever is in her way unless a member of her army convinces her to stop. Schwarz warns Annette to be careful as [[ImAHumanitarian she can accidentally eat her without knowing]].
* CuteMonsterGirl: Kind of a cross between a [[Franchise/{{Alien}} Xenomorph]] and [[Anime/DragonBallZ Cell's]] first form.
* ExtremeOmnivore: Eats both the living and nonliving.
* GameFace: While she's already dangerous, her victory animation has her snarling with her tail splitting into four.
* HornedHumanoid
* KnightOfCerebus: The darkest character in the game.
* LifeDrain: Her special attack is piercing her tail into her enemies and sucking their life (as opposed to actually eating them).
* ManOnFire: Occurs to any opponent dying from her special, as well as her own death animation like her fellow invaders.
* PuppeteerParasite: Schwarz is the name of the tailed parasite attached to the human. The woman herself is an unknown bystander.
[[/folder]]

[[folder:Fedeln Metzelei]]
[[quoteright:144:http://static.tvtropes.org/pmwiki/pub/images/msa_fedeln.png]]
A butterfly humanoid with extremely venomous scales. The second of the Metzelei Four.

* AccidentalMurder: Poisons a girl by just holding her hand.
* BeatTheCurseOutOfHim: Whatever Caroline shot at his wings caused his wings to stop leaking poison. Overjoyed by the revelation, Fedeln purposely puts himself on enemy fire until Nowan intervenes out of avoiding having Annette scold him for killing Fedeln.
* BlessedWithSuck: Has the ability to poison his enemies. Too bad his poison is uncontrollable and very potent to every living being.
* TheDreaded: Thanks to his uneven bursts of poison, even his allies are weary when working with him.
* LonersAreFreaks: Locked away from the other Invaders so he won't accidentally kill them all. Fedeln is quite the looney fellow.
* PrettyButterflies: Fedeln's wings are very colorful and also dangerous.
* PoisonIsCorrosive: His poison has the ability to melt everything.
[[/folder]]

!!Independent Army
Not an army as a whole, but a collection of warriors and adventurers not affiliated with any of the factions that get involved in the conflict.

[[folder:As A Whole]]
* RagtagBunchOfMisfits: Red Goblin, Scotia and Vatn teamed-up at one point to try and take down Ptolemaios. Later in another chapter of the independant Another Story, Jin is part of their group as well, conveniently escaping from the Ptolemaic Army.
[[/folder]]

[[folder:Scotia Amundsen]]
[[quoteright:214:http://static.tvtropes.org/pmwiki/pub/images/msa_scotia.png]]
A treasure hunter and the daughter of Scott Amundsen Jr., the archaeologist from the second mission of ''Metal Slug 2/X''.

* DisappearedDad: One of her goals is searching for her father who vanished looking for the Arabian Tears (a purple gem).
* {{Knockback}}: Affects any unit hit by her bullets.
* PinballProjectile: Her pistol bullets bounce on the top and bottom sides of the battlefield in short arcs.
[[/folder]]

[[folder:Red Goblin]]
[[quoteright:195:http://static.tvtropes.org/pmwiki/pub/images/msa_redgoblin.png]]
[[caption-width-right:195:Machyna and Red Goblin]]
The former leader of the Red Goblin society before Ptolemaios came in and dismantled the group.

* LaserBlade: Red Goblin's weapon.
* MeaningfulRename: Renamed himself after the society he once was a leader for.
* ParryingBullets: His special attack is able to destroy any projectile in the sword's path.
* RobotBuddy: His fellow drone, Machyna, who follows him and occasionally shoots lasers at opponents.
* TakingYouWithMe: His robot will charge at the opposing army once Red Goblin dies.
[[/folder]]

[[folder:El Dorado]]
[[quoteright:106:http://static.tvtropes.org/pmwiki/pub/images/msa_eldorado.png]]
A person who protects the Sand Kingdom, the desert missions of ''Metal Slug 2'' and ''3'', from the Arabian Rebel forces with his trusty Slug Armor.

* AllLovingHero: Actively protects the Sand Kingdom from all threats, often the Rebel Army.
* BigDamnHeroes: When Eri and Fio were forced to confront Vita, El Dorado comes in and provides Eri with the [[MiniMecha Slug Gunner]], taken from his personal collection.
* CaptainErsatz: He and his slug have a resemblance to ComicBook/IronMan.
* DeathFromAbove: Once his special is activated, he rises from the ground and starts attacking from the air until the mission is over or he dies.
* TheCassanova:
* PowerOfTrust: Initially treating Eri as an enemy, he eventually accept her as friendly and after giving her the backstory of the Sand Kingdom, offers his services in the fight against Abul Abbas and the Arabian Rebel forces.
* RedBaron: "The Golden Man"
* TranquilFury: Has a grudge against the Rebel Army for turning the Sand Kingdom that once had daily activity into a almost-lifeless town.
[[/folder]]

[[folder:Vatn]]
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/msa_vatn.png]]
A hired supernatural hunter of sorts.

* BadassLongcoat
* TheCharmer: Has a knack for this. He pulls this on Caroline, Percier and ALICE during a mission to sway them from Aswang's side.
* TheDrifter: Said to wander in his travels with no home to return to.
* EyeObscuringHat: Shown in his sprites.
* FriendToAllChildren: Was kind towards Caroline, and later Percier, during the Halloween Another Story. Says it reminds him of a friend from his childhood.
* MyGreatestFailure: Failing to kill Aswang the first time. He fails to kill her again as he still have feelings for her.
* ScrewThisImOuttaHere: Blows himself up in his defeat animation.
* {{Teleportation}}: His evade animation is him disappearing and reappearing a few spaces back.
* ThisIsADrill: His short-range attack is a drill attached to his gun.
* TrenchCoatWarfare: His coat contains his personal Gatling gun and many mortars to place.
[[/folder]]

[[folder:Cleopatra]]
[[quoteright:148:http://static.tvtropes.org/pmwiki/pub/images/msa_cleopatra.png]]
A servant to the Pharaoh.

* TheDragon: To the Pharaoh.
* EliteMook: Of the Lovely Mummies.
* EvilLaugh: When she uses her special attack.
* MostCommonSuperpower
* QuitYourWhining: Stops the Tyrant Pharaoh by destroying his arc and minions and silently saying him some things.
* ShockAndAwe: Makes lightning bolts appear on top of the front lines.
* {{Underboobs}}: Somehow manages avoiding complete exposure by her small piece of cloth.
[[/folder]]

[[folder:White Baby Prototype]]
[[quoteright:134:http://static.tvtropes.org/pmwiki/pub/images/msa_whitebaby.png]]
[[caption-width-right:134:White Baby holding Alice]]
A supervirus, created by the Amadeus Syndicate, in its prototype form. Like MS-Alice, White Baby is able to produce a mass hologram of herself.

* AIIsACrapshoot: There's a reason her name includes "Prototype". While she recognises her creator Amadeus as her "father", she rather go by her own rules than to work for him. Can also be considered GoneHorriblyRight.
* ArchEnemy: To Alice, another digital character.
* BigDamnHeroes: After Clone Betty and the Martians invaded the Amadeus base, Betty had Amadeus in her sights and could have killed him right then and there if White Baby didn't help herself to hack into Betty's AI, forcing the Martians to retreat.
* CreepyChild: Her avatar can easily give this impression, creepy giggle and all. She even treats her battles like a playful game.
* DigitizedHacker: As a computer virus, she can easily hack and take control of Amadeus technology, from Robots to the robot clones of Allen and Morden. She is also able to hack new technology, such as Clone Betty.
* EasterEgg: If Alice is part of the opposing team, then White Baby's victory animation will have her holding Alice by the pigtails.
* EnemySummoner: Her special is producing Amadeus Robots.
* {{Foil}}: [[RuleOfThree To Alice]]; Both are free-roaming A.I., and that's where the similarities end. While Alice is loyal to her faction and was merely made by accident, White Baby was made by the Amadeus Syndicate as a powerful computer virus who decided its better to work by herself than under the Syndicate. Although the former may be subverted after the events of the "White Breath" Extra Ops.
* FrickinLaserBeams: Her satellites and the Amadeus Robots.
* StockingFiller: Wears fishnet stockings.
[[/folder]]

[[folder:Jin]]
[[quoteright:120:http://static.tvtropes.org/pmwiki/pub/images/msa_jin.png]]
A soldier of an Eastern army (possibly the Japanese Assault Force) who left to a deserted location under the stress of an overly prolonged war.

* BareYourMidriff: It sooner or later bites her in the rear when blood starts gushing out of her stomach.
* BlankWhiteEyes: Her death animation starts with a shocked expression with her eyes wide open.
* {{Gainaxing}}: Part of her running animation.
* KatanasAreJustBetter: Her weapons.
* MsFanservice: The most blatant; a majority of her animations have her facing away from the camera.
* NotGoodWithPeople: Although she is fine hanging out with animals.
* {{Stripperific}}: A bikini, a neck collar, and fabric that only covers the front of her bottom legs.
* SmokingIsCool: Her victory is taking a casual smoke with a pipe.
[[/folder]]

[[folder:Aileen]]
[[quoteright:218:http://static.tvtropes.org/pmwiki/pub/images/msa_aileen.png]]
A previous member of the Amadeus Syndicate who joined the Pirates.

* TheAlcoholic: Her idle and winning animation has her chugging constantly. She even constructed her battle car in order to keep battling while drinking.
* CarFu: Her close range attack is ramming her car to her opponents.
* MolotovCocktail: Her special attack is throwing a large quantity of beer bottles.
* PirateGirl: A leader of one.
* WeaponizedCar: Her vehicle has a large cannon in the front.
[[/folder]]

[[folder:Elysion]]
[[quoteright:120:http://static.tvtropes.org/pmwiki/pub/images/msa_elysion.png]]
A pirate who rose from the dead after being disturbed by the Monoeye [=UFO=]s.

* AnArmAndALeg: She no longer has her left arm, which is replaced by a bunch of tentacles.
* BareYourMidriff
* CursedWithAwesome: Uses her powers to fight against the Monoeye [=UFO=]s.
* ElectricJellyfish: Her summoned jellyfish are able to stun units.
* {{Expy}}: Essentially, a female Davy Jones.
* FlyingSeafoodSpecial: Summons homing jellyfish and hovering squid to the opposing army.
* HookHand: Her right hand.
* GiantSquid: Her special attack. They have extremely long range, but they'll dissipate once they hit a unit.
* ManOnFire: Her death animation, based on the zombies' fire animation.
* NinjaPirateZombieRobot: Zombie pirate ghost with tentacles on her left arm.
* PirateGirl: Unlike Aileen, Elysion works alone.
[[/folder]]

[[folder:Esther]]
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/msa_esther.png]]
A girl who lives in an underground village.

* BigCreepyCrawlies: Lives among them.
* LawOfInverseRecoil: Her rifle has great power to toss her a great distance back.
* TheJuggernaut: The huge caterpillar she summons, Grandee, runs from base to the frontmost ground enemy. It keeps ramming until it gets tired and runs back to base.
[[/folder]]

[[folder:Aswang]]
[[quoteright:150:http://static.tvtropes.org/pmwiki/pub/images/msa_aswang.png]]
A young lady who claims is a real vampire (more or less), having restored to life by some mysterious force. Aswang is out for revenge on Vatn for incidents that have happened in the past. She has had a thing for metal treasures, but since silver bullets have been lodged in her body, she can only settle for plastic treasures, due to her being allergic to metal now.

* GoddamnedBats: Has this as her regular (long-range) attack.
* MookMaker: Has this as her special move, and can only make them appear from your base if she's still alive, this also heals her a bit. Note that there are certain units that cannot be made to the player side.
* PlotAllergy: As stated above, an allergy to medal. She resents Vatn of giving the allergy to her.
* WomanScorned: She was Vatn's first love. But due to incidents regarding a village and the silver bullets lodged in her, they part on bad terms. As a result, exacting revenge on Vatn became her primary goal.
[[/folder]]

[[folder:Licht and Elena]]
[[quoteright:160:http://static.tvtropes.org/pmwiki/pub/images/msa_lichtandelena.png]]
[[caption-width-right:160:Licht, Machyna, and Elena]]
Mysterious siblings from another timeline that practice swordsmanship. Both of them have some sort of obsession to defeat Ptolemaios. Both siblings have swords that are keepsakes of their parents. (Licht from his father, and Elena from her mother.)

* CoolBigSis: Licht takes big admiration on his elder sister.
* {{Expy}}: With that of Red Goblin for Licht and Jin for Elena, though both siblings have different move sets than their predecessors.
* ClothingDamage: For Elena, if she takes a certain amount of damage, her outfit is shredded, and only her lingerie is left standing.
* KidFromTheFuture: They all but said to be the children of Jin and Red Goblin from a BadFuture where Ptolomaios has become nearly unstoppable.
* RobotBuddy: Licht is followed by a red colored Machyna.
* ShockAndAwe: Licht's LaserBlade.
* SwordBeam: Elena's swords' ability.
* {{Stripperific}}: Elena starts countering when her clothes are off. She suffers knockback when clothed.
[[/folder]]

[[folder:Agalia]]
[[quoteright:177:http://static.tvtropes.org/pmwiki/pub/images/msa_agalia.png]]
A self-proclaimed pureblood vampire. She's responsible for releasing Aswang.

* BloodMagic: Powers up her special attack.
* FishOutOfWater: She unfamiliar with human culture.
* HornedHairdo: In her vampire form.
* HumansAreBastards: Helps other vampires captured by humans (such as Vatn).
* UndeathlyPallor: Starts off pale but gains color when Agalia finishes her special attack. Activating her special attack in her new state reverts her to normal.
* VampiricDraining: Unlike Aswang, Agalia can suck blood without physical contact.
[[/folder]]

* CombatTentacles: Everyone except Lydia are able to transform a limb of their body to a weapon.

* ManOnFire: Their general death animation has them burst into blue flames.
* TheyLookLikeUsNow: Their special ability is to transform into Earthlings.
* [[YouGottaHaveBlueHair You Gotta Have Purple Hair]]: Excluding Nowan, since he has advanced transformation abilities.

* AmbiguousGender: Even Nowan doesn't know what gender he is. Everyone refers to him as a he.
* ImposterForgotOneDetail: His impressions require more work. Allen Jr. caught Nowan's bluff when the former said his father laughs with an extra "ha" in the end.
* NotQuiteFlight: Produces a set of wings to leap forward. Nowan also hovers during his winning animation.

* ShapeshifterDefaultForm: His normal form is taken from a human he met long ago. This explains why his style looks different from his peers.
* ShapeshifterWeapon: Nowan is able to turn his limbs into spears, deploy gliding membranes from his back, turn himself into other characters (Allen O'Neil, Jin, Lightning Fio, and Beatriz) with their weapons in hand, and can even turn into a fully functioning ''Sand Marine''.
* VoluntaryShapeshifting: Is able to perfectly transform into anything. Gotten to the point that Nowan can't remember how he looked like, how old he is, or if he had a different name.

[[folder:Midori]]

* BareYourMidriff

* StraightArrow

* FriendToAllChildren: Was kind towards Caroline during the Halloween Another Story. Says it reminds him of a friend from his childhood.

* BecomeARealBoy: Chooses to work with Aswang for the possibility of gaining a flesh-and-blood body.

* NarrativeProfanityFilter: Not profanity. More like "anything suggestive". Marco being the PapaWolf, programmed a filter or a block into her that prevents her from thinking about anything seductive or sexual. Which makes her interaction with [[TheCharmer Vatn]] a little bit [[CringeComedy awkward]].

* SmallGirlBigGun: Downplayed. Her stature is small but her Di-Cokka tank is the side of a Metal Slug, that is equipped with a WaveMotionGun.

A female officer with strong leadership skills and being able to read people.