For characters seen throughout the series, such as the Big Daddies, Little Sisters and Splicers, please see [[Characters/BioShock here]].

For characters originated from the first game, please see [[Characters/BioShock1 here]].

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[[foldercontrol]]

[[folder:Main Game]]
!!Subject Delta

The protagonist of ''VideoGame/BioShock2'' and the PlayerCharacter, a SuperPrototype Big Daddy and the first to be successfully bonded to a Little Sister, who happened to be Eleanor Lamb. Unfortunately for Delta, Eleanor's mother Sofia managed to recover her and used an Hypnotize plasmid to force him to shoot himself in the head. Delta was revived years later by Doctor Tenenmbaum to stop Sofia who has taken over Rapture and aims to to something terrible to Eleanor.
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* {{Badass}}
* CantLiveWithoutYou: As an Alpha Series Big Daddy, Delta will either lapse into a coma or die unless he is reunited with Eleanor soon.
* ElementalPowers: Same as Jack.
** AnIcePerson: Winter Blast
** BlowYouAway: Cyclone Trap
** PlayingWithFire: Incinerate!
** ShockAndAwe: Electro Bolt
* TheFaceless
* FiringOneHanded: Justified by both his enhanced strength and because he wields his Plasmids with his off hand.
* HeroicMime: [[JustifiedTrope Justified]], since Big Daddies can't speak.
* MadeOfIron: Subject Delta endures a lot, even by the standards of most Alpha Series. In the cutscenes alone, he's hit by a wall of high-pressure water when a Big Sister shatters a bay window; he's trapped in a room and pelted with gunfire and molotov cocktails until the floorboards under him break, sending him on a three-story fall; the train car he's riding gets torpedoed by Father Wales; Sofia Lamb floods Siren Alley, nearly crushing him to death when a metal door's slammed into him by the resulting water pressure; his link to Eleanor is disrupted [[spoiler: when Sofia half-suffocates her with a pillow]], leaving him on the brink of death; a corridor of demolition charges explode in his face, and he has to [[spoiler: ride to the surface while hanging onto the side of Sinclair's escape pod, being battered and crushed by intense pressure on the way.]]
* MagicKnight: Optional. You can use just your drill and plasmids in this game, and there's a tonic which (optionally) forces you to use basically nothing else. With the right tonics and plasmids, this can be incredibly effective.
* OnlyKnownByTheirNickname: As Subject Delta [[spoiler:and Johnny Topside]].
* PapaWolf: He's a Big Daddy. It's literally part of the job description. Even more so on account of the fact that he is bonded to Eleanor alone, and will tear through an entire city's worth of Splicers, Big Daddies and Big Sisters to get her back.
* TheParagonAlwaysRebels: If you choose to go down the evil path, [[spoiler:then so would Eleanor herself]].
* PsychicLink: With Eleanor.
* PsychicPowers: Again, some of the plasmids:
** AstralProjection: Scout
** {{Brainwashed}}: Hypnotize
** MindOverMatter: Telekinesis
* RoaringRampageOfRevenge: It's entirely feasible to do a playthrough where you murder every living thing between you and Eleanor, including those who don't really deserve it and/or have no way of defending themselves.
* [[spoiler:SpiritAdvisor: In most of the endings, Eleanor injects herself with Delta's ADAM, allowing him to live on inside her mind.]]
* SuperPrototype: He's more mobile than a normal Big Daddy and can use plasmids, at the cost of not being quite as tough. Dr. Suchong also [[LampshadeHanging mentions]] that he's superior to what is to come, but they had to {{Nerf}} the following versions to the point of [[LoweredMonsterDifficulty "mediocrity"]], mostly because they would be too [[HoistByHisOwnPetard dangerously]] overpowered. Not to mention too expensive.
** Some of Gil Alexander's diaries also note that the "one Sister, one Daddy" linking system built into Delta ultimately caused more problems than it solved. Given the game's plot this was no doubt very true.
* ThisIsADrill
* TomatoInTheMirror: Not including the "WasOnceAMan" bit below (which isn't surprising since all Big Daddies were made from people), Sofia Lamb actually brings this up in conversation, talking about how cruel it is to force awareness onto something that was human but is no longer.
* WasOnceAMan: Apparently, he was known as [[spoiler: Johnny Topside, a deep-sea explorer who found Rapture whilst exploring the sea-bed]]. At least that's what Stanley says.

!!Dr. Sofia Lamb
http://static.tvtropes.org/pmwiki/pub/images/drlambbioshock_3576.bmp
-->''"Until ADAM, the human animal was a slave to the gene... the inner Tyrant. Lust... greed... rage; self obsession was etched into our DNA. We were not pulling the 'Great Chain of progress,' as Ryan believed - but shackled to it. But now, in theory, we can redraft the human blueprint. Serving the common interest can become as natural as breathing."''

The BigBad of [=BioShock=] 2. ''Series/DoctorWho'' fans [[HeyItsThatGuy may recognize her as]] Creator/AgathaChristie, played by Fenella Woolgar. An idealist as obsessive as Ryan, but with a philosophy that's diametrically opposite. She believes in absolute collectivism, denouncing individuality and even sentience as a curse. She plans to use her daughter Eleanor to set the foundations for Utopia, [[UtopiaJustifiesTheMeans whatever it takes]].
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* AbusiveParent: From the opening cutscene, it's plainly obvious that Sofia cares nothing for Eleanor, only for how she can be used to further her own plans. Of particular note is the way she says "[Eleanor] is ''mine''," the emphasis treating Eleanor more like an object than a person.
* AllLovingHero: [[ObviouslyEvil She's anything but]], yet still manages to be unique deconstruction of the idea. She loves everyone without bias. [[LetMeGetThisStraight Or, in other words]], no one person is important to her in any way, and everyone is a potential sacrifice for the sake of her Utopia.
* BigBad
** NonActionBigBad
* BerserkButton: [[spoiler: She couldn't stand Eleanor rejecting her ideology and went to increasingly erratic and extreme lengths to stop Subject Delta. Finally she smothers Eleanor in a last ditch attempt to stop Delta; she had no way of knowing this wouldn't kill Eleanor as well, but it's quite clear she didn't care]].
* BitchInSheepsClothing: Despite her calm demeanor and utopian views, she is [[TheSociopath clearly a cold-hearted sociopath at heart]], ruling Rapture with an iron fist.
* [[spoiler: BreakTheHaughty: Suffers from this in the semi-good ending of the game, especially when Eleanor makes it clear that she only saved Sofia's life to make sure that she'd go on living in the knowledge that her Utopia had failed and her daughter had betrayed her.]]
* BlondesAreEvil
* BlueAndOrangeMorality: ''Period''.
* DarkMessiah: Dark as they come.
* CatchPhrase: Usually starts her [[MotiveRant little]] [[BreakThemByTalking speeches]] with the phrase "Ask yourself".
* DirtyCommunists: While never identified as one per se, Ryan remarks the very presence of her collectivist ideas will cause another Kremlin to spring up in Rapture. He was right... [[spoiler:except if he hadn't betrayed his principles and thrown her in prison with the rest of his enemies ''just as she planned'', she'd never have been able to build her army. Just like how his anti-smuggling laws created Fontaine.]]
* EvilBrit: She's voiced by Fenella Woolgar.
* EvilMatriarch: Is she ever! It's clear from the opening cutscene that she possesses no love for Eleanor as a human being, only as a tool.
* TheEvilsOfFreeWill: She believes that individuality is the root of all evil.
* FauxAffablyEvil: Never raises her voice and is unfailingly polite, though at times condescending. This while she sends her army of splicers to murder you.
* FourEyesZeroSoul
* FreudianExcuse: In the form of her strict upbringing as a psychiatrist following in her father's footsteps, and in the form of her volunteer work in post-bomb Hiroshima.
* {{Foil}}: Her collectivist outlook makes her one to Andrew Ryan. Of course, see NotSoDifferent below.
* GoodSmokingEvilSmoking: Chain-smokes cigarettes--apparently as a result of stress, as the only time she's seen doing so is [[spoiler: when Delta is standing right outside her door.]]
* {{Hypocrite}}: She preaches collectivism, but she is practically as possessive as Ryan himself. This was true even before she came to power, as she leaves the surface because she believes others have corrupted HER collectivist ideas. She also continually berates Delta for stealing her child away, yet [[spoiler:has been kidnapping children from the surface to make them into Little Sisters]].
* [[spoiler:IHaveNoDaughter: Right before smothering Eleanor, she bemoans that Eleanor has been learning from Delta's actions instead of her own, rendering her little better than him in Sofia's eyes.]]
* LackOfEmpathy: Gil Alexander explains that Sofia does have empathy, but for everyone equally. The net result is that she doesn't give a single damn for any one individual, only caring about how they can benefit her cause for humanity as a whole.
* LeanAndMean
* LightIsNotGood: [[BlondesAreEvil Blonde]], [[FauxAffablyEvil pretends to be nice]], [[FauxSymbolism symbolic]] [[MeaningfulName name]], [[PathOfInspiration leads an evil cult]], [[TotalitarianUtilitarian and will screw the world over to make it "better"]]. Yee-up!
* ManipulativeBitch: She [[spoiler:engineered her ''own'' jail conviction to gain popular support as a martyr ''and'' place herself in a facility far from Rapture where she could turn the inmates into an army.]] Even ''Fontaine'' is impressed.
* MorallyAmbiguousDoctorate: She's a psychologist brought to Rapture by Ryan to shut the mentally fragile up.
* MoralSociopathy: A curious case in that she probably did not began as this, but by the time of ''[=BioShock=] 2'' she has definitely become a sociopath obsessed with her philosophy.
* NothingPersonal: She goes as far as to say she loves Subject Delta just as much as anyone else, before sending a pack of splicers to kill him. As noted above, she "loves" everyone, but to such an insignificant degree that their lives mean nothing to her.
* NotSoDifferent: Despite being Ryan's {{Foil}}, they are incredibly similar. They are both hypocrites willing to bend their philosophies to their own ends. They also both treat Rapture as a means to an end, more concerned with their imagined utopias than the actual city or inhabitants under their control. And as other trope entries on this page show, the similarities do not stop there.
* PsychicAssistedSuicide: Attempts to do this with Subject Delta at the beginning of the game by using a mind control plasmid. Fortunately, he gets better.
* PsychoPsychologist
* StraightEdgeEvil: Much like Ryan before her, she doesn't indulge in Plasmids and Gene Tonics, to the the point that the above-mentioned mind control was administered by one of Lamb's splicers.
* TautologicalTemplar: Sofia Lamb just wants [[EvilutionaryBiologist to push mankind into its next evolutionary stage]]. [[UtopiaJustifiesTheMeans It's for the Greater Good]], and [[FelonyMisdemeanor nothing could be more evil than trying to stop this noble goal]]. [[spoiler:[[CatchPhrase Ask yourself]]: are [[AfterTheEnd Rapture]], [[TheEvilsOfFreeWill human consciousness]], [[AssimilationPlot individuality itself]], and [[OffingTheOffspring Eleanor's mind]] ''really'' such high prices to pay for paradise?]]
* TotalitarianUtilitarian
* UnPerson: The reason you never heard of her in the first game - Andrew Ryan, not wanting ''any'' possibility of her regaining control, had all records of her existence disposed of.
* VillainousCheekbones
* WellIntentionedExtremist: [[spoiler: But not in the way most would think: her actions and audio diaries quite clearly reveal she never had any intention of saving Rapture. Her real goal is to create a "Utopian," who would be able to serve the common good with no concern for their own desires, and gradually convert the rest of the world into similar beings.]]

!!Augustus Sinclair / [[spoiler:Subject Omega]]
http://static.tvtropes.org/pmwiki/pub/images/sinclairsport_8246.bmp
-->''"You do business as long as I have, and you learn to pick a brand name from the writin' on the wall."''

A [[AffablyEvil friendly, charming and somewhat amoral]] businessman who aids Subject Delta in his quest to reunite with Eleanor Lamb. Voiced by Doug Boyd.
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* ActionSurvivor: Lives through the Rapture Civil War and ten years of Lamb's rule of Rapture while remaining unspliced. [[spoiler:Unfortunately for him, his skills failed him when he tried to rescue Delta and Eleanor.]]
* AffablyEvil: Amiable and without scruples from the word "go."
* AnEconomyIsYou: His principal business enterprise is a twofold scheme that [[ViciousCycle virtually guarantees repeat business]] - his Sinclair Deluxe apartments cater to poor and miserable individuals by offering cheap rooms at low prices, and the "tenant discount" available at his Sinclair Spirits bars makes sure said tenants ''remain'' poor and miserable.
* AntiHero: NominalHero at first, mellows out to UnscrupulousHero as he and Delta work together, [[spoiler:and reaches PragmaticHero in his final moments.]]
* AntiVillain: [[SlidingScaleOfAntiVillains Type I]]: he was involved in a lot of the more disturbing experiments and schemes run in Rapture, including the development of the Big Daddies, but he had [[EvenEvilHasStandards several lines he refused to cross]] and genuinely wants Delta to succeed in his mission to rescue Eleanor- especially since it will mean he gains access to technology he can sell on the surface.
** In a sense he's what Frank Fontaine would be like if he had some shred of morality [[spoiler:and ''weren't'' a sleazy conman]].
* [[spoiler:ApologeticAttacker]]: [[spoiler:Gets turned into an Alpha series Big Daddy near the end of the game and forced to fight Delta, desperately apologizing to him and Eleanor along the way.]]
* TheBarnum
* [[spoiler:BigDamnHeroes]]: [[spoiler:Attempts one of these to free Delta from captivity. It doesn't go well for him.]]
* [[spoiler:BossInMookClothing: Sinclair as an Alpha is considerably tougher than the ones you've fought so far, probably owing to his recent conversion and Lamb's meddling.]]
* ConsummateLiar: Subverted. Despite having similarities to Frank Fontaine, never does he actually ''lie'' to Delta. In fact, he's pretty much one of the most honest folk in Rapture and a foil of sorts to everything Fontaine represented. [[spoiler:Which doesn't save him from what Lamb has in mind.]]
* CorruptCorporateExecutive
* {{Foil}}: To Fontaine, much as Lamb provides one to Ryan: he's essentially Fontaine with a conscience and [[EvenEvilHasStandards a few morals]] keeping him at worst AffablyEvil, at best an AntiHero. His southern American accent might even be a reference to this: [[spoiler:[[WhatCouldHaveBeen Atlas was reportedly originally intended to speak with one]], before Fontaine's alter ego was changed to Irish instead.]]
* FreudianExcuse: Apparently, his grandfather was a strong believer in working in the name of "The People," and "The World Entire," and drowned in the construction of the Panama Canal- thus giving Augustus Sinclair an early bias against altruism.
* FunctionalAddict: He's apparently indulged in ADAM-based plastic surgery, but evidently not enough to drive him to Splicerdom.
* GenreSavvy: Much like Fontaine, Sinclair's successes (by his own admission) can be measured by his ability to predict Ryan's failures. Just as Fontaine rose to power by selling the things Ryan tried to deny his citizens, Sinclair became successful by banking on Ryan's inevitable failure to maintain his vision and a need to remove undesirables from his city.
* GoodSmokingEvilSmoking: Can be seen holding a cigarette holder on the one occasion Delta meets him face to face. In defiance of convention, however, Sinclair's not truly evil, just mercenary.
* [[spoiler:ICannotSelfTerminate: An absolutely heartbreaking example.]]
* JerkWithAHeartOfGold: Sure, he's an exploitative sleazebag who wants to sell Rapture's biotechnology to the highest bidder, but he goes out of his way to help Delta and prefers him showing mercy.
* [[spoiler:MercyKill: Would rather die than remain Sofia's slave, and you have to oblige.]]
* [[spoiler:RedemptionEqualsDeath: Apologizes for giving you up for Big daddy conversion after being converted himself, and only asks that you make sure Eleanor gets to see the sun after you kill him.]]
* SouthernFriedGenius: Born in Panama and raised in Georgia, Sinclair is a shrewd businessman, and according to some, a brilliant scientist. He ''did'' help develop the Vita-Chamber, after all.
* VoiceWithAnInternetConnection

!!Eleanor Lamb
http://static.tvtropes.org/pmwiki/pub/images/Eleanor_Lamp_Portrait_6365.png
Sofia Lamb's daughter and Delta's former Little Sister. Constantly in sedation, as part of Lamb's master plan. Voiced by Sara Bolger and Sydney Unseth (as a child).
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* AcquiredPoisonImmunity: Apparently due to her exposure to large amounts of ADAM as a child, Eleanor can tolerate extensive splicing without any of the side-effects. Unfortunately, this makes her the perfect candidate for her mother's experiment...
* [[spoiler:ActionGirl]]: [[spoiler:Even among other plasmid wielding citizens, Eleanor's talents are formidable. Her time as a little sister has also made her immune to the negative side-effects of splicing. Even more impressive once she becomes a Big Sister.]]
** [[spoiler: BadassBookworm: Extremely intelligent and knowledgeable as part of her upbringing.]]
** [[spoiler: BadassInDistress: Turns out she's ''very'' capable of looking after herself. It seems her mother was less afraid of others harming her and more afraid of her daughter simply going her own way.]]
* [[spoiler:ApocalypseMaiden]]
* [[spoiler:BlackEyesOfEvil: Not confirmed, but in some unfocused moments after absorbing Delta's conscience in the bad endings, her eyes seem to turn pitch black. It's quite unsettling.]]
* [[spoiler:BloodKnight: fairly low-key of you saved the little sisters, if you harvest them though, she actively enjoys rampaging through the splicers.]]
* BrainyBrunette
* BrattyTeenageDaughter: Sofia laments the fact [[spoiler: Delta is turning her into this.]] However in reality she's a subversion as [[spoiler: she's actually very respectful of her father for his past kindness and very much justified in acting out against her mothers attempts to crush her sense of identity. In the good ending she even saves her mother despite the ''deserved'' animosity, meaning she rose above her so called childish antics.]]
* ChildProdigy: Highly intelligent even in her earliest years, dismantling electronic devices and reassembling them for fun. She also had a tendency to disable her mother's security systems so she could sneak out of the house (not that this approach always worked).
** TeenGenius: [[spoiler: Masterminded the plan to resurrect Subject Delta.]]
* [[spoiler: CorruptTheCutie: As Eleanor is watching virtually everything you do, harvesting the Little Sisters and killing defenceless characters will result in her becoming just as ruthless and violent.]]
* CurbStompBattle: When you summon Eleanor to fight with you in Persephone, she pretty much stomps all over the splicers.
* DaddysGirl
** [[spoiler: DaddysLittleVillain: In the bad endings.]]
* [[spoiler: FromNobodyToNightmare: From a little sister to basically an invincible, teleporting [[BossInMookClothing Big Sister]] with telekinesis. Even more of a case in the Bad ending, in which case she's a BloodKnight that derives joy from both killing things and watching them die, and has both her own genius and Delta's cunning and experience on top of all those powers.]]
* EvilBrit: [[spoiler:Becomes one in the "bad" endings.]] Otherwise, she presents an {{Aversion}} of this trope, especially when compared to the examples provided by her mother and Dr Alexander.
* HumanSacrifice: Basically what her mother is planning.
* MessianicArchetype: [[DeconstructedTrope Gloriously torn apart and vaporized]].
** [[spoiler: Though she's implied to ''become'' a legitimate Messiah if you save the Little Sisters. Of course, she'll also become (symbolically) the AntiChrist if you harvest them. Messiahs go both ways, after all.]]
* PlayingWithFire: She can shoot fireballs out of her hands.
* PsychicPowers
** MindOverMatter
** PsychicLink: With Delta.
* RebelliousPrincess
* [[spoiler: StatuesqueStunner]]: [[spoiler: Upon donning the Big Sister suit, Eleanor stands eye to eye with Subject Delta. Big Sisters in general are also around 6'10".]]
* TeensAreMonsters: Unless you [[EarnYourHappyEnding work at it]].
* TeleportersAndTransporters: [[spoiler: Teleportation is another one of her powers as a Big Sister.]]
* [[spoiler: TookALevelInBadass]]: Near the end of the game, [[spoiler: the frail teenager you've been trying to reach for the whole game gets in a Big Sister suit, and proceeds to wreak unGodly havoc upon her mother's regime with [[GoneHorriblyRight the powers given by the ADAM injected into her]].]]
* VoiceWithAnInternetConnection: Or, more accurately, a telepathic connection.

!!Dr. Gilbert Alexander / [[spoiler:"Alex the Great"]]
http://static.tvtropes.org/pmwiki/pub/images/Gil_Alexander_1713.png
-->''"October 9th, 1967. Hello. My name is Gilbert Alexander, and by the time you hear this, I will be clinically insane."''

Another one of Fontaine Futuristics' leading scientists, Gilbert "Gil" Alexander replaced Dr. Suchong as head of the Protector Program; in this position, he created the Alpha Series and the symbiotic bond with their Little Sisters--making him indirectly responsible for [[spoiler: Johnny Topside]]'s conversion into Subject Delta. Following the collapse of Rapture's security police, he also designed the city's automated security system. However, he eventually fell in with Sofia Lamb and the Rapture Family, assisting in their development of a "Utopian," [[spoiler: even submitting himself to the first attempt to create one.]] Unfortunately, [[spoiler: the experiment resulted in him being horribly mutated and deranged by mass amounts of ADAM, ultimately reducing him to a nightmarish aquatic monster kept within a tank in the basement of Fontaine Futuristics.]]
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* ApocalypticLog: [[spoiler: How his still-lucid self communicates.]]
* TheAtoner: Dr. Alexander was genuinely ashamed that he'd been responsible for Eleanor's transformation into a Little Sister, and worked for many years to undo the conditioning he'd forced on her.
* AxCrazy: He has been known to [[FamilyUnfriendlyDeath "fire"]] Splicers under his employ, carving up [[MadnessMantra "You're Fired"]] above and around them, and hang them on the walls when he's not sending them after Delta. He literally makes every other insane person in Rapture (i.e just about everyone else) look tame by comparison.
* BadBoss: [[spoiler: Following his descent into insanity, "Alex the Great" has assumed total control of Fontaine Futuristics and declared himself CEO; given that there's no way of creating new products and no paying customers anyway, most of his time is spent torturing his splicer "employees."]]
* BerserkButton: Never, ''ever'' call him "Mister A" (or anything other than "Alex the Great"). Some poor Splicer under his "employ" found that out the hard way.
* BodyHorror: [[spoiler:We don't see his transformation take place, but given that the monster inside the tank looks like a cross between a fetus and a squid, it wasn't pretty.]]
* CrazyPrepared: [[spoiler: He might have been undergoing a horrific mutation and almost half-insane at the time, but Dr. Alexander was very careful in setting up a way for Delta to MercyKill him; first, he left several pre-recorded messages throughout the Fontaine Futuristics building, containing useful advice and essential passwords to restricted areas; secondly, he planted a cache of weapons and security bots to assist anyone who might come to the rescue; finally, just to make sure his rescuers would be sane enough to outwit his insane alter-ego, he programmed a bio-scan to exclude any visitors who weren't mentally up to the job.]]
* DeadpanSnarker: "Congratulations, you've won a battle of wits with a home appliance."
* EvilBrit: Apparently English--or at least he speaks in a Received Pronunciation accent- but not actually a villain until [[spoiler: massive doses of ADAM administered by Sofia Lamb drive him insane.]]
* FlunkyBoss: Controls everything in Fontaine Futuristics and gleefully flings everything he has at you, but once you've taken out all the mooks, he's practically helpless since [[spoiler: he can't get out of the tank to fight you.]]
* GadgeteerGenius: Not only did he mastermind Rapture's security systems, but [[spoiler: after his mutation began he also modified the branches of it around Fontaine Futuristics to provide help to anyone answering his DistressCall. After his mutation drove him insane, he also equipped numerous security drones with monitors and speakers to carry his voice and face- part of it, at least- to his "employees."]]
* HopelessSuitor: One of his audio diaries indicate that he has something of a crush on Sofia Lamb- even referring to her as a "Secular Saint"- though he admits that her LoveYouAndEverybody philosophy means that he can't be given preferential treatment.
* KickTheDog: [[spoiler: In one of his earliest scenes, Alex the Great has his modified security drone electrocute a terrified splicer for [[DisproportionateRetribution calling him]] [[FelonyMisdemeanor "Mister A"]].]]
* LargeHam: In every single audio diary in the game, he's heard speaking as quietly and carefully as possible, so it's a bit of a shock to hear him start hamming it up [[spoiler: as Alex the Great, chewing the scenery to a pulp and spitting it at Delta.]]
* MadScientist: As one of Rapture's scientific elite, this is a given.
* TheManBehindTheCurtain: [[spoiler:When Delta finally meets Dr. Alexander's horribly mutated self, he's not much of a threat without the splicers he employs; true, he may be a gigantic monster with the combined powers of hundreds of different splicers implanted into his body, but his reliance on his tank prevents him from physically attacking, and the bright light means that he can't even see Delta clearly enough to fight back in any other way.]]
* MeaningfulName: [[spoiler: The man's nickname is "Gill," and he ends up as an obvious aquatic lifeform.]]
* [[spoiler: MercyKill: His lucid self requests this from you, while his insane self begs to be spared; the decision's up to you.]]
* [[spoiler: SanitySlippage: By the time he recorded the messages, he was in the latter stages of this.]]
* ShockAndAwe: His personal security drone can zap things with electricity. He uses it to fry "disobedient" splicers and carve messages into the walls, as well as open doors occasionally.
* ShrinkingViolet: In most of the footage taken of him, Dr. Alexander comes across as nervous and painfully shy [[spoiler: prior to Lamb's experiments]]: in his audio diaries, he speaks in a halting, shaky voice, sometimes barely louder than a whisper; in the "Rapture's Best and Brightest" photo, he's at the very back of the group, looking as uncomfortable and agitated as possible.
* SinisterSurveillance
* TalkativeLoon: [[spoiler: After becoming Alex the Great, most definitely.]]
* [[spoiler: TragicMonster]]
* UnderStatement: Whenever he sends something at you it's said as normal workplace dialogue. This includes stuff like telling you he's 'sending an old co-worker of yours who wants to meet up with you'. [[spoiler: It's actually the first Alpha you meet, and it's pissed.]]
* TheVoice: Subject Delta never sees Gil Alexander's entire face at any point in the game except in old photographs. [[spoiler: Unless you're playing the PC version of the game, and you're prepared to use noclip.]]
* WeakenedByTheLight: [[spoiler:Dr. Alexander's new body can't stand bright light, and naturally recoils when Delta switches on the overhead lights in his chamber.]]
* YouHaveOutlivedYourUsefulness: [[spoiler: After it was found that the attempt to transform him into a Utopian had failed, Lamb abandoned Dr. Alexander.]]

!!Stanley Poole
http://static.tvtropes.org/pmwiki/pub/images/Stanley_Poole_5137.png
Stanley Poole was a reporter for the Rapture Tribune newspaper. He was hired by Augustus Sinclair on the behalf of Andrew Ryan to infiltrate the Rapture Family, and gather evidence so that Sofia Lamb could be imprisoned. It all went downhill for him from there.
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* ChronicBackstabbingDisorder: [[spoiler:Let's just say that there are very few people in the game that ''haven't'' been backstabbed by him at some point.]]
* CowerPower [[spoiler: Poole spends most of his only level hiding in a booth while forcing Delta to clear up his dirty business.]]
* DirtyCoward: [[spoiler: Poole's only real concern is keeping his ass out of the fire, and he's willing to go to the most repulsive lengths to ensure that nothing bad happens to him: this includes having Eleanor Lamb kidnapped and converted into a Little Sister, sabotaging Dionysus Park so that the entire population drowned, and ordering Delta to harvest any Little Sisters that might discover what he'd done. And when things start getting out of control, he quickly lapses into spineless begging.]]
* EvilUncle: When Sofia Lamb was arrested, she ordered Stanley Poole and Grace Holloway to take care of Eleanor; as such, Poole ended up being called "Uncle Stanley," and proved his credentials in the evil uncle field by [[spoiler: having Eleanor kidnapped to prevent her from ratting him out.]]
* FunctionalAddict: Flashbacks show that Poole has been splicing, but he's obviously been able to keep his habit under control for now.
* TheHedonist: Upon Lamb's incarceration, Stanley assumed stewardship of Dionysus Park, and apparently made the place live up to its name by hosting wild parties every night (on ''her'' dime, of course).
* HeKnowsTooMuch: [[spoiler: From Poole's point of view everyone in Dionysus Park knew too much, so he found a way to KillEmAll.]]
* HeroWorshipper: One of his audio diaries reveals that he's come to admire Subject Delta- or, as he was known when he was still a human being, [[spoiler: Johnny Topside]]- after interviewing him for the Tribune. [[spoiler: Poole also went on to frame him as a spy and have him imprisoned in Persephone, where he was transformed into a Big Daddy, so he obviously didn't admire Topside ''that'' much.]]
* OhCrap: [[spoiler: At the end of his level, Poole suffers a ''doozy'' of an OhCrap moment when Sofia Lamb remotely opens the door to his booth and informs Delta just who was ''really'' responsible for his conversion into a Big Daddy.]]
* PaidHarem: [[spoiler: One of the flashbacks shows Poole during one of his parties, which he financed by using all of Lambs money, and he has two girls next to him, obviously both slightly spliced, and he appears at least as he hopes to have his way with them both.]]
* {{Paparazzi}}
* TheMole
** By extension, [[spoiler: MoleInCharge]]
* SmugSnake
* UnreliableNarrator: Take ''anything'' he says with a small ocean's worth of salt.

!!Grace Holloway
http://static.tvtropes.org/pmwiki/pub/images/Grace_Holloway_8373.png

A lounge singer who was blacklisted by Andrew Ryan after singing protest songs against his rule, with her lover James being taken away. She became one of Sofia's most devoted followers, and was entrusted with keeping Eleanor safe when Sofia was imprisoned by Ryan. She failed in her duty when [[spoiler:Stanley Poole]] betrayed Sofia and kidnapped Eleanor. Grace eventually saw Eleanor as a Little Sister being guarded by Delta, who broke her jaw when she tried to hug Eleanor, prompting Grace to believe that Delta was the one who kidnapped Eleanor and transformed her. Elenor gave her control over Pauper's Drop after taking over Rapture. Voiced by Sheryl Lee Ralph.
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* AntiVillain: [[SlidingScaleOfAntiVillains Type IV]].
* BadassBoast: "I remember you, monster. You stole Eleanor from me...twisted that baby girl into a thing so sick it can't even ''die''... and now you come swanning into ''my'' neighborhood lookin' for me? Wrong turn, Tin Daddy. When we hang you from a streetlight, and you're choking out your last... I want you to remember my face."
* CelebritySurvivor
* TheDarkChick
* [[spoiler:FaceDeathWithDignity: If Delta choses to kill her.]]
* [[spoiler:HeelRealization: If Delta spares her, she realizes that he is not a monster and provides him supplies to stop Sofia and rescue Eleanor.]]
* ItsPersonal: She isn't just following orders when it comes to hunting Delta. She was tasked with caring for Eleanor and got a broken jaw for her trouble when she tried to hug her in Delta's presence after she was kidnapped and converted. She believes Delta was the kidnapper, too.
* ParentalSubstitute: Eleanor went to live with her after Sofia's incarceration, and it's clear that Grace's love for the little girl was far more genuine than her mother's.
* MamaBear: To Eleanor.

!!Simon Wales
http://static.tvtropes.org/pmwiki/pub/images/Simon_Wales_5647.png

One of the architects that Andrew Ryan hired to design Rapture alongside his brother Daniel, he was struck hard by the depression that hit the city and blamed himself for leaks in the city that killed citizens. He found comfort in Sofia Lamb's teachings, and restyled himself as "Father Wales", spreading her message as the leader of a religious cult called the "Rapture Family" in Siren Alley. Voiced by Richard Poe.
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* AntiVillain: [[SlidingScaleOfAntiVillains Type III]].
* BadassBeard: Before he was spliced up.
* BodyHorror: His body is extremely deformed from splicing.
* BossInMookClothing: A souped-up Spider Splicer in clerical garb and a black hat.
* TheDragon
* EvenEvilHasLovedOnes: His brother Daniel, even though he rejects Sofia's philosophy. [[spoiler:He becomes enraged when Delta kills Daniel.]]
* HeroWorshipper: Towards Jack, whom he believes is a god, with Sofia Lamb as his prophet.
* IrishPriest: A very twisted one.
* MadeOfIron: He has more health then some Big Daddy variants!
* NiceHat
* SinisterMinister
* WallCrawl
* WithGreatPowerComesGreatInsanity

!!Daniel Wales
http://static.tvtropes.org/pmwiki/pub/images/daniel_wales_3771.png

Simon's brother and his former partner in designing Rapture, Daniel felt none of the guilt his brother did when leaks killed several people around Rapture. He refused to follow his brother into Sofia's cult, and instead established himself as the head of the Pink Pearl Brothel in Siren Ally. Voiced by Graham Rowat.
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* TheAlcoholic
* BlackSheep: In Ireland, due to being an atheist who designed churches.
* BossInMookClothing: A souped-up Leadhead Splicer.
* CowardlyBoss
* {{Hypocrite}}: He won't let his prostitutes splice up, but is heavily spliced himself.
* {{Jerkass}}
* MolotovCocktail: One of his primary weapons.
* NiceHat

!!Mark Meltzer
http://static.tvtropes.org/pmwiki/pub/images/MarkMel_1613.png
The protagonist of the "Something in The Sea" AlternateRealityGame who was incorporated into ''[=BioShock=] 2'' by fan demand. Mark G. Meltzer was an ordinary middle aged American citizen who developed an interest in a series of kidnappings of children along European coastlines, which unknown to him were being perpetrated by Big Sisters. Unfortunately, during his investigation, one Big Sister managed to follow him and kidnap his own daughter Cindy. He then dedicated the rest of his life to getting Cindy back, becoming one of the few {{Muggles}} aware of the existence of Rapture and one of fewer that managed to travel there. By the time Delta is revived, Mark is shortly ahead of him, searching for Cindy.
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* ActionSurvivor
* BadassNormal: He is unspliced, while in Rapture he only carries a pistol, and [[spoiler: when the Big Sister captures him he still manages to get some shots off despite being distracted by his daughter.]]
* [[spoiler: BittersweetEnding: He is captured by Sofia Lamb and is given the choice between death or becoming a Big Daddy and protecting Cindy. He chooses the latter. The player most likely kills him but can rescue Cindy. [[ShootTheShaggyDog Or harvest her.]]]]
* {{Determinator}}
* HeroOfAnotherStory
* PapaWolf
* SplashOfColor: His character portrait is the only one in the series that's in color as opposed to monochrome, emphasizing his nature as a {{Muggle}} and an outsider.
* [[spoiler:TragicMonster]]
[[/folder]]

[[folder:Minerva's Den]]
!!Subject Sigma

The protagonist of [=BioShock=] 2 DLC Minerva's Den and the PlayerCharacter, another SuperPrototype Big Daddy.
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* ElementalPowers: Same as two previous protagonists
** AnIcePerson: Winter Blast
** BlowYouAway: Cyclone Trap
** PlayingWithFire: Incinerate!
** ShockAndAwe: Electro Bolt
* FiringOneHanded: For the same reason as Delta.
* GeniusBruiser: He is [[spoiler:C.M. Porter.]]
* HeroicMime: [[JustifiedTrope Justified]], since Big Daddies can't speak.
* PsychicPowers: again, some of the plasmids:
** {{Brainwashed}}: Hypnotize
** MindOverMatter: Telekinesis
* SuperPrototype
* ThisIsADrill
* TomatoInTheMirror: Inverted. [[spoiler:It is revealed at the end of Minerva's Den that Subject Sigma is C.M. Porter; C.M. Porter who has been assisting him turns out to be The Thinker.]]
* TragicMonster: [[spoiler:Subverted in the end where he is back to an unspliced state.]]

!!Charles Millton Porter
http://static.tvtropes.org/pmwiki/pub/images/C_M_Porter_5114.png
A brilliant mathematician, Porter worked for the allies in London during World War II, losing his wife Pearl to the German bombings. He accepted Andrew Ryan's offer to work in Rapture, building The Thinker, the ultimate processing machine, [[spoiler:which he hoped to use to resurrect his dead wife.]] He was betrayed by his partner Reed Wahl and imprisoned in Persephone, but eventually escaped and teamed up with Dr. Tenenbaum and Subject Sigma to liberate The Thinker and flee Rapture. [[spoiler:Subject Sigma is eventually revealed to be Porter, with the one guiding the player actually being The Thinker.]] Voiced by Carl Lumbly.
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* BewareTheNiceOnes: He's able to see through not only Ryan and Fontaine's schemes but also smart enough to stay out of Lamb's way upon guessing more or less what she's really up to. That's not even getting to his actions as [[spoiler:Subject Sigma]].
* TheLostLenore: His wife Pearl.
* MissionControl
* [[spoiler:{{Necromantic}}: His main motivation for humanizing the Thinker was to bring his dead wife Pearl back to some degree with the Thinker's advanced approximation of Pearl's personality. Although the Thinker is successful in its emulation, Porter realizes that it isn't Pearl and stops.]]
* NiceGuy: He's shown through the audio logs to be one of the nicest, most sympathetic people in Rapture. And also one of the most sane.
* OnlySaneMan: While he does have some deep issues involving the Thinker [[spoiler:and his dead wife]], the fact that he ''doesn't'' fall for Lamb's "solution" says a lot about his state of mind.
* WeUsedToBeFriends: Him and Wahl. He states that he doesn't care if Wahl makes it back to the surface or not, and would prefer him to rot in Rapture.

!!Reed Wahl
http://static.tvtropes.org/pmwiki/pub/images/Wahl_Reed_2263.png
The antagonist of the Minerva's Den DLC, Porter's former partner who betrayed him to take control of The Thinker alone, believing that it can be used to crack a perfect equation that can predict everything. Voiced by Keith Szarabajka.
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* AuthorityEqualsAsskicking: For a skinny mathematician, Wahl is remarkably strong even by Splicer standards when you finally fight him, as he can take almost as much damage as a Big Sister (though, since he lacks Big Daddy damage resistance and effect immunity, it's pretty easy to juggle him to death with your plasmids and weapons).
* BossInMooksClothing: [[spoiler: He is a reaused buttons splicer, with a NiceHat.]]
* DeadlyEuphemism: "Sigma must be removed from the equation".
* EvilGenius
* [[spoiler: FinalBoss]]
* {{Foreshadowing}}: After realizing that [[spoiler: Sigma is Porter,]] Wahl hints to Sigma that he knows it, by [[spoiler: pointing out the inconsistencies of Porter suddenly returning from Persephone, the HellHolePrison over them all, and completely sane and normal.]]
* TheLastOfTheseIsNotLikeTheOthers: Unlike the other main antagonists of Bioshock 1 and 2, Wahl's radio ambience shares the generic kind that Atlas, Sinclair, etc. use, rather than the deep ominous one used by Ryan, Fontaine, and Lamb.
* MadMathematician: Minerva's Den is full of equations scrawled on the walls in chalk, paint and even ''blood'', all presumably Wahl's work in his efforts to find the "predictive equation", an equation he believes can be used to predict the future.
* NiceHat: While not a hat per se, the headgear he wears is intriguing.
* SweetTooth: The floor to his office is littered with bottles of Hop-Up Cola, implying he's been using the drink's high amounts of caffeine to keep himself from sleeping on the job.
* VillainousBreakdown: When Sigma approaches closer and closer, and he runs out of Mooks, he gets more and more angry, constantly telling Sigma to turn back and stop. Ending with him [[spoiler: attacking Sigma in a battle he could have told himself would end in his death.]]

!!The Thinker
The computer created by Reed Wahl and Charles Milton Porter in Minervas Den. It is a perfect Artificial Intelligence, maintaining the automated systems of Rapture and running Minervas Den on its own. Porter, Tenenbaum, and Sigma want it in order to cure ADAM sickness. Unfortunately Wahl controls it, and desires to use it to crack the perfect predictive equation. It is sentient, and its true allegiance is unknown. [[spoiler: It helps Sigma and Tenenbaum, by impersonating Porter while betraying Wahl.]]
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* BenevolentAI: [[spoiler: Unlike basically everything else in Rapture, The Thinker is benevolent, and actively works against Wahl, and wants to help Tenenbaum make an ADAM Sickness cure.]]
* TheChessmaster: [[spoiler: Basically planned for the events of Minervas Den to happen, and everything went exactly as planned in the end, the only hitch was Wahl figuring out he had been betrayed by it, and shutting it down, nearly killing everyone, and foiling its plans.]]
* {{MacGuffin}}: Everybody in Minervas Den wants it. Wahl has it. [[spoiler: It itself wants to escape Rapture.]]
** LivingMacGuffin
* MadnessMantra: "Mine" and "Property of Reed Wahl", seen all over Minerva's Den.
* ReplacementGoldfish: Porter used it to replicate Pearl, his lost wife. It did not go well.
* RoboSpeak: Although it is sentient, it is not human.
* UncannyValley: Invoked during the replication of Pearl. Also, while it is as sentient as a human, it definitely does not act like a human.
[[/folder]]
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