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First Baby is a new character introduced in Metal Slug Attack.

Character Summary

The original version of White Baby, First Baby is an AI resembling an adolescent female. The Doctor locked her away in the deepest parts of his files, with no contact whatosever after realizing that she was too dangerous to let loose. This made her insane and have a desire to break her enemies apart. White Baby would eventually break out from her prison. She sees White Baby and Iron Fortress as her younger siblings and is very protective and affectionate towards them both.

Like White Baby, First Baby rides a platform, but uses a different attack style.


Extra Ops

First appearing in the Extra Ops "Sky King", she is freed by White Baby and the two decide to cause some mischief by attacking a Sky King. They severely damage it, after which Navy attempts to hack First Baby, but White Baby removes the program before it can fully control her. First Baby thanks her for the timely save.

Later on in "United Front the 10th", she is seen with the Iron Fortress trying to figure out what is wrong with White Baby. She tries to look around but is repelled, before stating that she is more interested in the golden weapon heading their way. Arriving at the battlefield, First Baby helps her younger sister out.

When Iron Fortress runs away from the Amadeus Syndicate, First Baby goes out to find her. She finds her sister being attacked by Allen Platoon, and promptly saves her, ordering her to run as she handles her attackers.

The Doctor later decides to seal First Baby away once more, due to her unpredictability and the inability to understand the truth that shapes human society, much to White Baby's disappointment. As she is sealed away, she somehow ends up at a Regular Army base, startling MS-Heart and Midori. With a vastly different personality, First Baby proclaims that she will protect them if humanity will not. Her arrival is met with a hostile response, with Midori running a Slug Copter against her. She easily destroys it, but soon hesitates as she begins to revert to her original personality. Midori later purges First Baby from the Regular Army system, as the AI wants Amadeus to love her as she fades away.

Another Story

She makes an appearance in "Random walk rather than capreca number", where she tries to find Iron Fortress after she runs away but is unable to. Following her return to the base, she consoles her. The story's secret ending also reveals that the Doctor sealed her away because she was too dangerous, even though she only wanted to show affection to her creator.


Sprite Gallery


Heroes Main Series Marco RossiTarma RovingEri KasamotoFio GermiTrevor SpaceyNadia CasselRalf JonesClark StillLeona Heidern
Spin-Offs Walter RyanTyra ElsonHeroGimletRed EyeTequila
Mobile Roberto NicolaNathalie NeoAlisa StewartHeltonTildeNikitaMatildaAmirWhipHeidern
Support Hyakutaro IchimonjiRumi AikawaMadoka AikawaUtanNavelSelinaIssenman TarouErisHyakumantaroPupipi
Villains Main Series Donald MordenAllen O'NeilAbul AbbasRootmarsDoctorAvatar of EvilInvader King
Spin-Offs Allen Jr.OgumaMacbaLt. WiredKananHilde Garn
Mobile Unknown AlienVictorPtolemaiosAnubis the ChainedNanook
Instructors Sophia GreenvilleMargaret SouthwoodRiviera von WittenbergMaryell von WittenbergCynthia HartnettAnne
NPC AnnouncerPOWsDuke KoudouSatiko SuzukiGerhardt City CiviliansScott Amundsen Jr.MinerGenie of LampOrcaPresidentSurvivorsFishmanLumberjackSailorChinese Soldier
Crossover KOF TeamBattle Cats
Unused Phil GeneMichiko NakajimaAngry Man • "Achilles" • "Tabomba"
Metal Slug: Commander MerrisDalia
Metal Slug: Awakening Goddess AncorCatherine
Metal Slug Attack
Regular Army Associates MS-AliceAnna WieseMidori SchumannMelloRita LewinskyAmberNikitaReika BradfordLouiseGiseeMS-HeartAshleyRockyGrowlJephetVictoriaClaudiaKanaeHowellPhiElizabeth MarianiUndoCharlotte
Metal Device Project PercheAmiMollyMenzelUlalaMaggieAvvioQuaithKaren
Rebel Army Associates RapidJuliaChloeIzabellaEddaGrowth & ClineNaomiAleshaJane Doe
ACE AbigailDionRomyKriemhildKatalina
"Frozen Brigade" BeatrizVickyDolores
Blaze Brigade GraziaLorettaNorah
Allen Platoon DestradeHuracanConnyNantesPadwahOlgaVirginia
Science Department VitaNavyNovaEmmaMillefieSylfieFluffyEight Eight
Arabian Army ShizukaAisha
Ptolemaic Army Rebellion DragunovYoshinoCarolineVeronicaSisiliaTowaSimonMiharuChunyanOwenShoLucyPhoebeJosetteMizunaMatildaLittle Lady BlackSvetlaHumphreyLithosYutongTatyanaCicaLinhua
Cultists Mira D. GenesisMariaDamianAchettoSallyCaraOao-OneSorceress
Secret Sect Anastasia IVBelieversBeechamMelvinaAnastasia IZahara
Others Reverse Trinity
Space Army Martians Professor "Aionion"Mars People NeoPercierClone AbbyClone BettyMars People RangersAriadnaGemini TwinsHalleBonnyClarioHarriotCode Marionette:UnPaulineLeoneClarisDracoRaubtier
Invaders OdetteAnnetteLydiaNowanSchwarz MetzeleiFedeln MetzeleiRillacleFrankeTelekoBloom MetzeleiOdileBersekGeweih MetzeleiPurple KingBarbelnBiene GoldenesSwordeistDrache GoldenesEis MonstrumAi AgateLiebenGoldenes Krieger
Unaffiliated UnsignedLi Lin
Independent Army Amadeus Syndicate White BabyAlmaOttoIron FortressValerian BearsFirst BabyType:Ant-Lion
Red Goblin Society Scotia AmundsenRed GoblinVatnJinAileenElenaLichtIchimaWendyBushin TenzanMaki
Mummy Army PharaohCleopatraHemetArsinoeHatholSharifaRamalSekhatWepset
Vampires AswangAgaliaSharlGrace
"World Military Corp." KellyMayaMirror Mantis
Mirage Circus CocatrixBunny
Unaffiliated El DoradoElysionEstherTeresaMinervaYang DaoYuki Tsuki HanaIdoPhiliaHisui