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[[caption-width-right:217:[[labelnote:Click here to see Colin in the Give Up Ending.]]:https://static.tvtropes.org/pmwiki/pub/images/colin_give_up.png[[/labelnote]]]]
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* DespairEventHorizon: At several points in the game Colin nearly hits this after learning he SleptThroughTheApocalypse. The ''Special Edition'' features "Give Up" as a new [[MultipleEndings bad ending]]. When Dr. K reveals to him he's infected with the fatal Pale Virus, and hasn't long to live, Colin abandons all hope of escape or saving Puro. Days go by as he idles in the observation room, until the leaking gas eventually 'transfurs' him, and Dr. K returns as [[ByTheLightsOfTheirEyes the lights go out]].
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* BlindSeer: He admits to Colin that as a Dark Latex beast his eyesight is poor, and he has trouble registering stationary objects. Puro can however, use [[BizarreAlienSenses his other senses]] to see the world around him just fine, so this is an InformedFlaw. Without finding an animal in nature to adequately draw comparison to, the wolf tries to explain his ability to see is almost like echolocation.
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** The ''Special Edition'' goes into more detail that Puro is in fact a special kind of latex beast, a "Super Intelligent Individual" (SII). While self-aware, and many smarter than humans, they were ineffectual at stopping the Pale Virus because being absorbed by a SII still caused a LossOfIdentity. SII latexes still had the HorrorHunger. Thunder Science sought to ''[[ProperlyParanoid eliminate them immediately]]'' by forcing the SII to [[DevolutionDevice merge with regular-latex beasts]]. Selective breeding, made them almost blind to remove any danger the SII posed. This was a temporary solution, as the FormerlySapientSpecies can use their [[BlindSeer other senses to see]], and if they assimilate humans again [[TemporaryBlindness their vision is restored]] and they regain their sentience. This may mean that Puro is either the LastOfHisKind, or the SII are returning AfterTheEnd. Dr. K would love to study him, were it not for his UndyingLoyalty to Colin.
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** The ''Special Edition'' goes into more detail that Puro is in fact a special kind of latex beast, a "Super Intelligent Individual" (SII). While self-aware, and many smarter than humans, they were ineffectual at stopping the Pale Virus because being absorbed by a SII still caused a LossOfIdentity. SII latexes still had the HorrorHunger. Thunder Science sought to ''[[ProperlyParanoid eliminate them immediately]]'' by forcing the SII to [[DevolutionDevice merge with regular-latex beasts]]. Selective beasts]] via selective breeding, which made them almost blind to remove any danger the SII posed.blind. This was a temporary solution, as the FormerlySapientSpecies can use their [[BlindSeer other senses to see]], and if they assimilate humans again [[TemporaryBlindness their vision is restored]] and they regain their sentience. This may mean that Puro is either the LastOfHisKind, or the SII are returning AfterTheEnd. Dr. K would love to study him, were it not for his UndyingLoyalty to Colin.
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** The ''Special Edition'' goes into more detail that Puro is in fact a special kind of latex beast, a "Super Intelligent Individual" (SII). While self-aware, and many smarter than humans, they were ineffectual at stopping the Pale Virus because being absorbed by a SII still caused a LossOfIdentity. SII latexes still had the HorrorHunger. Thunder Science sought to ''[[ProperlyParanoid eliminate them immediately]]'' by forcing the SII to [[DevolutionDevice merge with regular-latex beasts]]. Selective breeding, made them almost blind to remove any danger the SII posed. This was a temporary solution, as the FormerlySapientSpecies can use their [[BlindSeer other senses to see]], and if they assimilate humans again [[TemporaryBlindness their vision is restored]] and they regain their sentience. This may mean that Puro is either the LastOfHisKind, or the SII are returning AfterTheEnd. Dr. K would love to study him, were it not for his UndyingLoyalty to Colin.
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* TheImmune: Thanks to the K Mutagen, he cannot be "transfurred" again. Puro tries to assimilate him in the ''Special Edition'' to rescue Colin, but fails to do anything other than mess his hair up.
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* TauntingTheTransformed: K is not above mocking Colin's misfortune in several [[NonStandardGameOver game overs]] when he's become a latex beast.
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* BadassNormal: Colin's just an ordinary young man, using his wits to escape from hordes of unkillable goo monsters that all want to assimilate him.
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* InnocentlyInsensitive: In the original version, Puro will make off-hand comments that, while not meaning to offend, come across as insulting. Saying Colin looks weak so he's not suitable for assimilation (most likely to reinforce that Puro's friendly and to put the human at ease), and in one case all but calling Colin fat when he has to throw or carry him by first admitting that Colin is heavy, then straight up ''whining'' about how heavy Colin is when he has to bridal carry him past some FrictionlessIce.
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* AmbiguouslyGay: You could just call them great friends, but his infatuation with Colin definitely raises some questions.
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* UnwinnableTrainingSimulation: In the 'Special Edition' the player can find "games" in his office made from recordings of Tail infecting rioters outside the tower. It's impossible for the escaping monster to lose, which suggests K's [[GivingUpOnLogic unable to come to terms]] with how humanity ended on that [[WorldGoneMad fateful day]].
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* SneezeOfDoom: Colin has a habit of sneezing at either the best or worst times. Sometimes his sneezes are followed by a transfur, but one time, as Colin read that an area was under construction, he sneezed which caused the floor to give out, dumping him into the greenhouse and seperating him from Puro.
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'''Main Characters''' | [[Characters/ChangedLatexSpecies Latex Species]] | [[Characters/ChangedTheMonsters The Monsters]] | [[Characters/ChangedMinorCharacters Minor Characters]] | [[Characters/ChangedOtherCharacters Other Characters]]-]]]]]
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'''Main Characters''' | [[Characters/ChangedLatexSpecies Latex Species]] | [[Characters/ChangedTheMonsters The Monsters]] | [[Characters/ChangedBossMonsters Boss Monsters]] | [[Characters/ChangedMinorCharacters Minor Characters]] | [[Characters/ChangedOtherCharacters Other Characters]]-]]]]]
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* AssimilationPlot: A low relationship with Puro sees the Betrayal ending playing out. After reaching the end of the Aquatic Area, he'll give up hope of escaping the building alive, as without a host body, he doesn't have long to live before regeneration [[DeathOfPersonality destroys his newfound sapience]]. He devastatedly reveals he always doubted Colin could survive with the world outside. Hoping to spare his friend and himself from dying [[DyingAlone ignoble and lonely deaths]], he opts to "transfur" Colin personally, trapping him in a hallway with no escape. The latter has been running from barely sentient monsters, and should know how [[YouWillNotEvadeMe utterly screwed he is]] [[OhCrap at this point]]. The [[EasyModeMockery worst possible outcome]] is Puro fully assimilating Colin into himself. The second worst has him instead turn the latter into a blue-eyed [[TwoSiblingsInOne version of himself]], referring to him as an [[HumanPet extension of his being under his control]]. Only ThePowerOfFriendship and playing on Normal mode can avert this.
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* AssimilationPlot: A low relationship with Puro sees the Betrayal ending playing out. After reaching the end of the Aquatic Area, he'll give up hope of escaping the building alive, as without a host body, he doesn't have long to live before regeneration [[DeathOfPersonality destroys his newfound sapience]]. He devastatedly reveals he always doubted Colin could survive with the world outside. Hoping to spare his friend and himself from dying [[DyingAlone ignoble and lonely deaths]], he opts to "transfur" Colin personally, trapping him in a hallway with no escape. The latter has been running from barely sentient monsters, and should know how [[YouWillNotEvadeMe utterly screwed he is]] [[OhCrap at this point]]. The [[EasyModeMockery worst possible outcome]] is Puro fully assimilating Colin into himself. The second worst has him instead turn the latter into a blue-eyed [[TwoSiblingsInOne version of himself]], referring to him as an [[HumanPet extension of his being under his control]]. Only ThePowerOfFriendship and playing on Normal mode can avert this.
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* AmbiguousGender: Despite being an ordinary dark-latex wolf, he displays characteristics of both genders. His mask is shaped like a female dark-latex wolf's and he possesses the fluffy tail and [[TuftOfHeadFur hair fur]] that females do, but he has no visible mammaries and claims to be male.
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* AmbiguousGender: Despite being an ordinary dark-latex wolf, he displays characteristics of both genders. His mask is shaped like a female dark-latex wolf's and he possesses the fluffy tail and [[TuftOfHeadFur hair fur]] that females do, but he has no visible mammaries and claims to be identifies as male.
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* BorrowedBiometricBypass: In the No Trust ending, he thanks Colin for restarting complex's backup generator, just before [[KickTheDog abandoning him]] to the White latex jungle. Since the doctor "transfurred" himself long ago, the older machinery in the basement no longer recognised him as an active user.
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* FearIsTheAppropriateResponse: Colin's only human, despite his stoic expression. Being chased by latex monsters like Circle or Feng Yu, there'll be times when he's running scared out of his mind and the biometric [[SavePoint Save points]] won't recognize him, or he'll be too frightened to climb escape ladders.
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* HappilyAdopted: Many latex beasts (Puro included in one of the bad endings) will take Colin in under their wing as their sibling or child if they 'transfur' him. In most cases, the former-human [[TheMindIsAPlaythingOfTheBody couldn't be happier]].
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IMPLICATION. For all you and I know (at this point) it could just be a "FUN / WTF" value given it's randomly set when we hit "New Game".
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* GenderBender: ''Special Edition'' shows even he wasn't immune to this. The mutagen he used to save his life is very stable (unlike the [[RandomNumberGod 50/50 chance]] Colin gets whenever unwillingly 'transfurred'). The odds were [[MillionToOneChance 1 in a 1000]] of it changing his gender to female. Despite the low probability, it ''can'' still happen, as the player might find out when the scientist [[LightswitchSurprise first appears in-person]] with a GenderedOutfit.
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* GenderBender: ''Special Edition'' shows implies even he wasn't Doctor K isn't immune to this. The mutagen he used to save his the scientist's life is very stable (unlike the [[RandomNumberGod 50/50 chance]] Colin gets whenever unwillingly 'transfurred'). The odds were are [[MillionToOneChance 1 in a 1000]] of it changing his gender to female.the subject's gender. Despite the low probability, it ''can'' still happen, as the player might find out when the scientist [[LightswitchSurprise first appears in-person]] with a GenderedOutfit.
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* LightswitchSurprise: Done with surveillance, K takes a direct approach in dealing with Colin. Revealing himself before trapping the man in a room away from Puro, and [[KnockoutGas incapacitating him]].
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[[caption-width-right:260:[[labelnote:Click here to see female Dr. K.]]:https://static.tvtropes.org/pmwiki/pub/images/dr_k_special_female.png[[/labelnote]]]]
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* GenderBender: ''Special Edition'' shows even he wasn't immune to this. The mutagen he used to save his life is very stable (unlike the [[RandomNumberGod 50/50 chance]] Colin gets whenever unwillingly 'transfurred'). The odds were [[MillionToOneChance 1 in a 1000]] of it changing his gender to female. Despite the low probability, it ''can'' still happen, as the player might find out when the scientist [[LightswitchSurprise first appears in-person]] with a GenderedOutfit.
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* AssimilationPlot: A low relationship with Puro sees the Betrayal ending playing out. After reaching the end of the Aquatic Area, he'll give up hope of escaping the building alive, as without a host body, he doesn't have long to live before regeneration [[DeathOfPersonality destroys his newfound sapience]]. Revealing he always doubted Colin could survive with the world outside devastated. Hoping to spare his friend and himself from dying [[DyingAlone ignoble and lonely deaths]], he opts to "transfur" Colin personally, trapping him in a hallway with no escape. The latter has been running from barely sentient monsters, and should know how [[YouWillNotEvadeMe utterly screwed he is]] [[OhCrap at this point]]. The [[EasyModeMockery worst possible outcome]] is Puro fully assimilating Colin into himself. The second worst has him instead turn the latter into a blue-eyed [[TwoSiblingsInOne version of himself]], referring to him as an [[HumanPet extension of his being under his control]]. Only ThePowerOfFriendship and playing on Normal mode can avert this.
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* AssimilationPlot: A low relationship with Puro sees the Betrayal ending playing out. After reaching the end of the Aquatic Area, he'll give up hope of escaping the building alive, as without a host body, he doesn't have long to live before regeneration [[DeathOfPersonality destroys his newfound sapience]]. Revealing He devastatedly reveals he always doubted Colin could survive with the world outside devastated.outside. Hoping to spare his friend and himself from dying [[DyingAlone ignoble and lonely deaths]], he opts to "transfur" Colin personally, trapping him in a hallway with no escape. The latter has been running from barely sentient monsters, and should know how [[YouWillNotEvadeMe utterly screwed he is]] [[OhCrap at this point]]. The [[EasyModeMockery worst possible outcome]] is Puro fully assimilating Colin into himself. The second worst has him instead turn the latter into a blue-eyed [[TwoSiblingsInOne version of himself]], referring to him as an [[HumanPet extension of his being under his control]]. Only ThePowerOfFriendship and playing on Normal mode can avert this.
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[[WMG:[[center: [-''VideoGame/{{Changed}}'' '''[[Characters/Changed Main Character Index]]'''\\
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[[WMG:[[center: [-''VideoGame/{{Changed}}'' '''[[Characters/Changed '''[[Characters/{{Changed}} Main Character Index]]'''\\
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[[WMG:[[center: [-''VideoGame/Changed'' '''[[Characters/Changed Main Character Index]]'''\\
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[[WMG:[[center: [-''VideoGame/Changed'' [-''VideoGame/{{Changed}}'' '''[[Characters/Changed Main Character Index]]'''\\
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character page is now too long, creating separate pages
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[[WMG:[[center: [-''VideoGame/Changed'' '''[[Characters/Changed Main Character Index]]'''\\
'''Main Characters''' | [[Characters/ChangedLatexSpecies Latex Species]] | [[Characters/ChangedTheMonsters The Monsters]] | [[Characters/ChangedMinorCharacters Minor Characters]] | [[Characters/ChangedOtherCharacters Other Characters]]-]]]]]
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[[foldercontrol]]
!!!The main cast
[[folder:Colin]]
!!Colin
[[quoteright:217:https://static.tvtropes.org/pmwiki/pub/images/colin_special.png]]
[[caption-width-right:217:[[labelnote:Click here to see Colin in one of the bad endings.]]:https://static.tvtropes.org/pmwiki/pub/images/colin_bad_ending_special.png[[/labelnote]]]]
[[caption-width-right:217:[[labelnote:Click here to see Colin in the True Ending.]]:https://static.tvtropes.org/pmwiki/pub/images/colin_true_ending.png[[/labelnote]]]]
[[caption-width-right:217:[[labelnote:Click here to see the benign latex.]]:https://static.tvtropes.org/pmwiki/pub/images/benign_latex.png[[/labelnote]]]]
[[caption-width-right:217:[[labelnote:Click here to see Puro's disguise.]]:https://static.tvtropes.org/pmwiki/pub/images/puro_disguise.png[[/labelnote]]]]
Colin, also known as "Human" by Puro, is the main protagonist and player character of ''Changed''.
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* ActionSurvivor: Colin is relatively skinny, has amnesia, has no clue what is going on at the labs, and is facing latex creatures who can absorb or transform him [[TouchOfDeath with a touch]]. All he has going for him is his wits, relatively fast speed compared to most of the other creatures, and Puro's help. That's all he needs.
* AlternateIdentityAmnesia: In one of the ''Special Edition'' bad endings, he gets transfurred into a white latex creature and temporarily suffers DeathOfPersonality. Puro recovers him somewhat, but it's implied he's completely lost his memory and merely kept his NiceGuy personality.
* AmnesiacHero: He's been in cryogenic stasis for so long, he can't remember how he ended up in the tower or who's been taking care of him.
* AndIMustScream: His fate if any creature chooses to absorb him rather than transfur. His body and organs get digested inside the latex beast. Yet he's still alive, [[CagedInsideAMonster trapped deep inside]] the now-immortal monster, unable to ever escape or exert his will over the captor, leaving him an immobile prisoner.
* AndThenJohnWasAZombie: Almost every latex creature in the building turns him into one of them if they're not outright assimilating him. He also ends up being turned into a dark or white latex wolf in every ending except "I Choose To Stay" and "I Choose To Leave".
* BabyTalk:
** In ''Special Edition's'' bad endings where he's 'transfurred' but keeps some small shred of his memories, Colin communicates with Puro with sounds, gurgles, and gibberish.
** In a different bad ending, he gets 'transfurred' into a white latex creature, and is barely able to sound out Puro's name. Puro promises to teach him speech all over again.
* BlindfoldedVision: As part of the Genetic Project's [[QuarantineWithExtremePrejudice precautionary measures]], the Benign Latex he wears will restrain him if it awakens, immobilises him with [[PrehensileTail its long tail]], and blindfolds him, all so he can't escape or pose a danger to any other humans. [[note]]The creature lacks the sentience needed to know there are none remaining.[[/note]]
* ABoyAndHisX: A young man and his adorkable BlobMonster.
* ControllableHelplessness: There'll be instances where the player won't immediately lose control of Colin as he succumbs to double transfur fusions or other, but by then, it's already [[YouAreAlreadyDead too late for him]].
* DeathOfPersonality: Many of the game-overs drive home this fact, if any creatures capture and assimilate him in the infested labs he loses his independence and individuality, ''forever''.
* DisposableVagrant: Dr. K considers him this, a poor nobody whose fight for survival is jeopardizing the goals of the world leaders to restart mankind and civilization.
* DyingAsYourself: He passes away in the "Leave" ending, finally succumbing to the lethal virus Dr. K feared he was carrying. As the [[ShowDontTell Steam achievement shows]], Puro sadly cares about his human friend's determination so much, the latex wolf doesn't assimilate him, burying him among the ruins instead.
* EyesAreMental: He's the only creature in the lab with blue eyes outside of the Tiger Shark, who WasOnceAMan. Notably, his eyes stay blue whenever he gets 'transfurred' but is implied or confirmed to have not suffered DeathOfPersonality, only having them change colour when he's definitely no longer himself.
* FailedASpotCheck: He has no idea the pants he wears are actually a dormant latex creature, designed by Thunder Science to act as a RestrainingBolt in the unlikely event of his escape from the testing area. Even Puro doesn't realize, only noting there's a "familiar goo scent" about them. The machines however, detect its presence much to the deuteragonists confusion.
* ForcedTransformation: Colin gets turned into numerous different species depending on what captures him, with varying levels of brainwashing added in.
* FountainOfYouth: In the ''Special Edition'', touching one of the large black crystals in the dark-latex wolf territory causes Colin's body to split apart into a handful of dark-latex wolf pups. While the rest appear to be as mindless and feral as every other dark-latex wolf, one has [[EyesAreMental blue eyes]] like Colin and is shown looking at their paw in confusion, suggesting Colin's mind was transferred into that one pup.
* GenderBender: Sometimes falls prey to this depending on the creature that assimilates him, and sometimes he's [[GenderBenderAngst not happy]] about it.
* GenderBenderAngst: If two latex bunnies transfur into him together, he becomes a female latex rabbit. Colin's immediate reaction upon noticing her new gender is to cover her breasts while blushing profusely.
* HalfDressedCartoonAnimal: Because he already wears nothing but a pair of benign latex shorts, every transfur that doesn't end up destroying or removing them results in him becoming one of these.
* TheHeroDies: In the "I Choose To Leave" ending, he is confirmed to have [[ThePlague the Pale virus]] and dies from it next to Puro while watching the sunset. The achievement icon shows Puro buried his human friend, with his own fate left unknown, but not looking good.
* HeroicMime: Has very few, if any, lines of dialogue, and mostly conveys his feelings through {{Pictorial Speech Bubble}}s.
* HeterosexualLifePartners: Becomes this with Puro in the GoldenEnding.
* HumanPopsicle: Colin was one of many [[TestedOnHumans test subjects]] placed into cryogenic stasis for experimentation with the latex beasts and/or until a solution was found for the Pale Virus. After several years his capsule kicks him out due to CryonicsFailure as the escaped goo monsters travelling through the ducts mess with the room's wiring.
* IChooseToStay: In one of the endings Colin can listen to Dr. K and choose to not leave with Puro. It's a TearJerker as the monster companion [[WhatTheHellHero calls Colin out for not keeping his promise]] to see the outside world with him. As he sadly leaves the building alone, Colin's doomed himself to become a HumanPopsicle as the Doctor tries in vain to treat an incurable disease, while Puro will suffer a DeathOfPersonality soon without a host.
* IJustWantToBeFree: He wants to escape the tower complex to the outside world, knowing there may be nothing for him out in the ruins. Everytime a latex creature captures and starts assimilating him, it's always an [[FightingFromTheInside unwilling transformation]], but there's nothing he can do to fight back against these predators once in their clutches.
* ImNotHereToMakeFriends: He can choose to not thank Puro when helped, and [[FriendshipDenial ignore the friendly wolf]] at every opportunity, but this will have [[AssimilationPlot life-changing consequences]] for him later in the game.
* JumpingTheGenderBarrier: Several transfurs while Puro is accompanying Colin will have the transfurred latter flirting with or seducing Puro in the transfur screen. Puro's reaction to this occurring is typically confusion.
* TheKlutz: The adolescent often slips on rubbish or manages to get himself into predictments that attract the attention of the latex beasts.
* LastOfHisKind: Subverted. Colin is a TokenHuman in the game as the human race is virtually wiped out from the Pale Virus pandemic. There are the ultra-rich and world leaders who've [[SafeZoneHopeSpot bunkered down]] in an undisclosed location to weather out the apocalypse in hopes Dr. K can find a better solution.
* LivingClothes: In the ''Special Edition'', his black pants are really a [[HidingInPlainSight dormant latex creature]] that were [[CrazyPrepared programmed]] to awaken [[RestrainingBolt and restrain]] from scanning laser lights should subjects like him ever try to escape.
* TheMindIsAPlaythingOfTheBody: Most, but not all, of the transfurmations he undergoes he soon quickly happily embraces, [[ThatManIsDead forgetting he ever was human]].[[note]]The one definite exception is in the True Ending, in which Dr. K gives him the same transfurmation he [[ProfessorGuineaPig subjected himself to]], which cures Colin of his plague while leaving his mind intact.[[/note]]
* MorphicResonance: Downplayed. Some of the 'transfurmations' he suffers will have him retain his eye color and hairstyle.
* MysteriousPast: We don't know much of his teenage life before he was put into CryoPrison, except that he was happy and [[IgnoranceIsBliss largely unaware]] of the global pandemic.
* NoOneShouldSurviveThat: Even Dr. K [[LeaningOnTheFourthWall lampshades]] Colin's up against insurmountable odds in trying to escape the lab facility. It's ''swarming'' with [[BlobMonster escaped experiments]] that want to consume him on sight.
* NoSell: He tries to avenge Puro by assaulting Dr. K for killing Puro's [[DeathOfPersonality sentience]] and reducing him to his [[BroughtDownToNormal dark-latex default form]] if their relationship isn't sufficiently high. As the doctor is more flexible and healthy by comparison, this backfires.
* NotQuiteBackToNormal: When he manages to pull off a traffic cone latex attempting to assimilate him in ''Special Edition'', he manages to remove it, but his body underneath has been altered. His shorts are gone, he has white fur all over, and he also has a tail, snout, animal ears, and paws, indicating that the traffic cone latex turned his inner body into some kind of canine-like latex.
* OddFriendship: He sparks one with Puro, a dark-latex wolf, one of the latex beasts that instinctively hunt down humans to [[TheAssimilator assimilate]] or [[TheVirus transfur]] them.
* OnlyFriend: As anyone he once knew before the pandemic is now either dead or transfurred, Puro becomes this for him when properly befriended.
* PaperThinDisguise: Towards the end of the offices in ''Special Edition'', he can find and don a dark-latex wolf costume to get through the dark-latex wolf crowd undetected. The costume is poorly made, and is so unlifelike that ''every'' latex wolf present is confused by it, but it's just barely convincing enough that they don't attack Colin.
* PeoplePuppet: The Wolf King turns him into one if he catches the human with one of his crystals during his boss fight. The transfur screen depicts the human, seemingly having suffered DeathOfPersonality, being turned [[HalfHumanHybrid halfway into a dark-latex wolf]] and toyed with for the Wolf King's amusement.
* ThePlague: He doesn't realize he carries the deadly incurable Pale Virus and it's slowly killing him.
* SavedByThePhlebotinum: In the "ESC" ending, Doctor K injects a [[MutagenicGoo mutagenic latex serum]] into Colin that he once tested [[ProfessorGuineaPig upon himself]]. Though it irreversibly changes the human's body into a light-latex wolf-like beast, it successfully eradicates the Pale Virus, and preserves Colin's mind without any adverse side effects.
* TheStoic: Lampshaded by Dr. K, Colin always has a calm, cool and collected expression on his face.
* SuperDrowningSkills. He can't swim. Falling into deep water always results in him sinking like a stone, though (un)luckily he never drowns as aquatic latex beasts will always "[[EmergencyTransformation save]]" him.
* UngratefulBastard: Dr. K will [[WhatTheHellHero berate Colin if]] he leaves Puro behind heartbroken after saving him from the Squid Pups. Him proceeding without showing Puro gratitude secures the Betrayal ending, as K is able to convince the dark-latex beast to assimilate Colin.
* UnwittingTestSubject: He was brought into the complex years ago as a mere test subject for the Genetic Project. Puro himself later confesses the reason why he's left sticky notes and hazards early-on, because he wanted to test the human's strengths to see if they were a worthy host to assimilate.
* VagueAge: According to WordOfGod, Colin's chronologically aged 23, meaning he was [[UnwittingTestSubject abducted as a teenager]] before becoming a HumanPopsicle pending experimentation.
* WalkingShirtlessScene: Colin wears nothing but a pair of pants throughout the entirety of the game.
* WeakButSkilled: Noted by Puro, Colin's not [[MusclesAreMeaningful physically strong]], unable to move heavy metal crates, but the young man is ''a very athletic runner''. Colin can surprisingly move at the same speed [[LightningBruiser as Yuin]]. The problem? He's hungry, the Pale Virus is slowly killing him, and [[PowerUpFood any food]] needed to give him an energy burst, [[BoxAndStickTrap is the obvious trap]] of a latex beast lying in wait.
* WhiteWolvesAreSpecial: In the ESC ending, Dr. K uses the same wolf latex batch on Colin he used to save his life from the Pale virus. After three days in observation, he loses his humanity, but keeps all his memories and identity. Puro still adorably calls him "Human".
* WhyDidItHaveToBeSnakes: In the Special Edition it is showcased he has Ophidiophobia, so any snake-like latex creature latching onto Colin will cause the young man to run around freaking out before being inevitably 'transfurred'.
* WorthyOpponent: The Wolf King seems to see the human as this, as surviving long enough before being transfurred in his boss fight will have him choose to accept the transfurred Colin into his pack as opposed to making him a PeoplePuppet.
* YourDaysAreNumbered: The "I Choose to Leave" ending, this is true for Colin as well as Puro. As Dr. K suspected, he was indeed carrying the Pale Virus that devastated the world, and by the ending, he [[DyingAsYourself finally perishes from it]] just hours after exiting the building.
[[/folder]]
[[folder:Puro]]
!!Puro
[[quoteright:191:https://static.tvtropes.org/pmwiki/pub/images/puro_changed_7_2.png]]
[[caption-width-right:191:[[labelnote:Click here to see Puro in the worst ending.]]:https://static.tvtropes.org/pmwiki/pub/images/puro_bad_ending.png[[/labelnote]]]]
[[caption-width-right:191:[[labelnote:Click here to see Puro in the bad ending.]]:https://static.tvtropes.org/pmwiki/pub/images/puro_bad_ending2_6.png[[/labelnote]]]]
[[caption-width-right:191:[[labelnote:Click here to see Puro in the captured ending.]]:https://static.tvtropes.org/pmwiki/pub/images/poor_puro.png[[/labelnote]]]]
Puro is the deuteragonist of ''Changed''. He is a friendly dark latex wolf-like creature, the only [[WhiteSheep seemingly benign monster]] that doesn't want to absorb you on sight. He's capable of speech and helps Colin throughout the game.
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* AmbiguousGender: Despite being an ordinary dark-latex wolf, he displays characteristics of both genders. His mask is shaped like a female dark-latex wolf's and he possesses the fluffy tail and [[TuftOfHeadFur hair fur]] that females do, but he has no visible mammaries and claims to be male.
* TheAssimilator: All latex creatures are driven by impulse and instinct on a cellular-level to swallow up any human on sight. Puro mostly resists this, though warns Colin to never suddenly jump on, or accidentally bump into him, otherwise he'll absorb him instantly and involuntarily.
* AssimilationPlot: A low relationship with Puro sees the Betrayal ending playing out. After reaching the end of the Aquatic Area, he'll give up hope of escaping the building alive, as without a host body, he doesn't have long to live before regeneration [[DeathOfPersonality destroys his newfound sapience]]. Revealing he always doubted Colin could survive with the world outside devastated. Hoping to spare his friend and himself from dying [[DyingAlone ignoble and lonely deaths]], he opts to "transfur" Colin personally, trapping him in a hallway with no escape. The latter has been running from barely sentient monsters, and should know how [[YouWillNotEvadeMe utterly screwed he is]] [[OhCrap at this point]]. The [[EasyModeMockery worst possible outcome]] is Puro fully assimilating Colin into himself. The second worst has him instead turn the latter into a blue-eyed [[TwoSiblingsInOne version of himself]], referring to him as an [[HumanPet extension of his being under his control]]. Only ThePowerOfFriendship and playing on Normal mode can avert this.
* BigBrotherInstinct: After assimilating Colin to be his new little brother in one of the ''Special Edition'' bad endings, Puro becomes a doting older brother figure for the [[BabyTalk non-verbal]] Colin, giving him words of encouragement when drawing pictures, and feeding him canned food in his den.
* BigDamnHeroes: Saves Colin on several occasions from stronger latex beasts threatening to engulf him.
* {{Bookworm}}: As a pup he was drawn to the Library, [[IntriguedByHumanity fascinated with human works]] unlike his brethren. After his kind rejected him for leaving, they became his only source of comfort during many lonely days and nights. Puro eventually becomes a BadassBookworm when protecting Colin from countless threats seeking to absorb him.
* CallToAgriculture: Wanting to emulate humans, Puro tried to start up his own farm, using white latex beasts he raised from blobs [[FantasticLivestock as livestock]] only to find they tasted ''terrible''.
* CruelToBeKind: How he considers Colin's fate when swallowing him up in the worst ending, as both are doomed to die without each other otherwise.
* DoubleKnockout: A strong relationship with Puro before the confrontation with Dr. K will ensure his survival as both fight each other to a stalemate.
* DreamCrushingHandicap: Considers himself weak and fragile without [[BodyAndHost a human host]] inside him. Puro's very disappointed when Colin emerges out of stasis to find he's [[MusclesAreMeaningful nowhere near as muscular]] as he fantasized him to be.
* EatingTheEnemy: His solution for dealing with a particularly persistent light-latex blob that refuses to surrender Colin. Amusingly he's so stuffed he asks his human friend [[CuriosityIsACrapshoot not to poke round anymore vents]] anytime soon.
* EccentricArtist: Puro's quite talented, and leaves all sorts of doodles and drawings lying around the complex for Colin to find.
* EdutainmentGame: The wolf-latex monster learned how to articulate and communicate words through a children's "Mr. Orange" educational toy made by the same robotics company that once rented the tower complex before the pandemic. Though admits writing was harder to learn and he often can't [[YouNoTakeCandle always grasp]] grammar or punctuation of the human language.
* TheExile: His own kind will [[IndividualityIsIllegal not accept him back]] after he willingly left their pack.
* FantasticRacism: Puro ''hates'' the light-latex goo creatures due to AnimalJingoism, and laments the competing species have never liked each other.
* GrowBeyondTheirProgramming: Whereas his dark-latex kind were regarded as a FlawedPrototype as pups by their human creators, Puro exceeded expectations as he eventually learned to read, write, talk, and even draw as he studied in isolation.
* HeroicSelfDeprecation: When a friendship blossoms between him and Colin, Puro will belittle himself at every given opportunity even when he's just [[BigDamnHeroes helped the human]] out of a jam. He'll sing Colin's praises, as the young man insists on [[YouAreBetterThanYouThinkYouAre showing him gratitude]].
* HeroicWannabe: Early on, he tried to script a scenario where he would appear to be an IdealHero, saving Colin from white latex tail-like monsters, but as the human requested he [[StalkerWithoutACrush stop following him everywhere]], it derailed the whole plan to impress his would-be friend. Dr. K [[PretenderDiss calls him out]] on this stating his ultimate goal was always an AssimilationPlot. If Colin befriends Puro properly, eventually the wolf does [[NobleWolf become noble]] and [[BecomingTheBoast heroic]] after all.
* HeterosexualLifePartners: Becomes this with Colin in the GoldenEnding.
* HorrorHunger: He's driven by a primordial desire of his species' hunger to 'transfur' other humans into themselves, only Colin showing he cares about him can stall these urges for the story's duration.
* HumansAreSpecial: Puro's a firm believer that humans are an amazing species bordering on the magical, that can do anything if they put their minds to it. He's unaware Colin [[HumansAreAverage isn't superhuman]], so asking for help or directions confuses the benign latex creature.
* IJustWantToBeBadass: He used to fantasize Colin [[MusclesAreMeaningful would be muscular]] when he finally arrived so when assimilated Puro would become so powerful he'd fear no man or beast ever again. A strong relationship with Puro reveals he's now more afraid [[PleaseDontLeaveMe of losing his only friend]], than the other latex creatures and will [[TookALevelInBadass do anything to protect]] his human.
* IJustWantToBeNormal: More than anything he wants to be human, some endings have him opt for the [[TheAssimilator next best thing]].
* IJustWantToHaveFriends: Puro has been alone for a long time, enough that his HorrorHunger is coming into conflict by a deeper need to have a companion. Already [[AllOfTheOtherReindeer ostracized by his own kind]], Colin picks up from the [[MysteriousBacker notes left by Puro]] his increasing anxieties and fears if the human doesn't like him when he arrives at the Library.
* IntriguedByHumanity: Puro loves everything about human culture and history, spending years alone reading books written by people long dead and gone.
* LongHairedPrettyBoy: Puro's build, unlike his more muscular dark-latex wolf kind, appears very feminine with long curly hair. He had to explain to Colin when they first met [[AmbiguousGender he's not female]]. He dreams of having a [[MusclesAreMeaningful burly body]] someday.
* MergerOfSouls: In one of the ''Special Edition'' betrayed endings a partially-befriended Puro will absorb Colin into himself, but thereafter refers to himself as neither Colin nor as Puro. He regards both individuals that make him up as the two former-lives he once had, before becoming an entirely new being.
* MisunderstoodLonerWithAHeartOfGold: If you get to know him, he's a big shy sweetheart.
* MortalityPhobia: Latex monsters after an indeterminate period will regenerate into [[{{Reincarnation}} their base forms and back again]] infinitely, without [[BodyAndHost human hosts]]. If they assimilate someone, they'll [[ShapeshifterModeLock halt this cycle]], evolve, and quickly embrace the fact [[LivingForeverIsAwesome they'll live forever]] (by our standards). The goo beasts don't comprehend their [[BlessedWithSuck resetting lifespans]], but Puro ''does''. Fearing a DeathOfPersonality, he's [[ImmortalitySeeker become desperate to absorb someone]].
* MusclesAreMeaningful: Finally achieves the pecs he desired for so long in the ''Special Edition's'' worst ending, where Colin fails to befriend him but trusts him with his safety. Puro 'transfurs' Colin into himself directly, and becomes much bigger and aggressive in the closing cutscene.
* MysteriousBacker: Heartwarmingly, Puro was watching over Colin for years, ensuring Dr. K couldn't devise [[DeathIsTheOnlyOption a no-win scenario]]. The dark-latex wolf leaves notes and directions everywhere, blocking off dangerous routes, so the human will proceed to meet up in the Library. Even making Elder One [[ThePromise promise]] the dark-latex dragons would grant him safe passage if he proved his worth.
* NobleWolf: When fully befriended by Colin, Puro will do anything to protect him from being 'transfurred' by another Latex experiment.
* NonhumanSidekick: Gradually becomes a loyal companion and friend who dotes on Colin constantly during the course of their trek through the tower complex.
* NoSenseOfPersonalSpace: Comes with the inherent aptitude of being a BlobMonster, Puro's friendly, lonely, and often excitedly up in Colin's face.
* ObfuscatingStupidity: He's no fool. Having spent years reading books about the world and human civilization he knows just from a glance the world is already doomed, and only accompanies Colin to kill time.
* OnlyFriend: If a strong relationship with Colin flourishes, Puro will openly declare this, remarking he will follow his beloved human, forever.
* PickyEater: Puro loves only sweet juicy delectables, and detests anything bitter. The oranges grown in the greenhouse [[LethalChef by Prototype]] made him pass out, and the wolf never returned there to eat again.
* ThePowerOfFriendship: If Colin spends time and shows Puro he cares about him, the latex wolf monster will develop feelings for him, and actively resist trying to assimilate his human friend for the remainder of their adventure, [[PredatorTurnedProtector even protecting Colin from other monsters]] looking to absorb him.
* RougeAnglesOfSatin: In the Special Edition, which otherwise mostly resolved the previous version's TranslationTrainwreck, his notes to the player are full of conspicuous typos. Though he's relatively eloquent in person.
* RogueDrone: As a cub he broke off from his dark latex wolf HiveMind to read books in the Library. He still longed to absorb a human for himself very badly, but as Puro ''[[CuriosityCausesConversion absorbed himself]]'' in his reading, the wolf goo developed a [[IntriguedByHumanity fascination for mankind]], now longing to [[IJustWantToHaveFriends befriend]] the protagonist.
* SecretTestOfCharacter: He later confesses the reason why he's left sticky notes everywhere and hazards early-on for Colin, because he was wrestling with his animal instincts and newfound conscience. Puro wanted to test the human's strengths to see if they were a host worthy of assimilating.
* SuperNotDrowningSkills: The dark-latex wolf monster cannot swim, his body's cellular density is too great, but since he doesn't need to breathe underwater it's of little concern besides [[HatesBaths getting his tail wet]].
** Averted as of the ''Special Edition'' where Puro does the doggy paddle, but since he wants to imitate humans finds it embarrassing more so since Colin saw the whole spectacle.
* TheShrink: DefiedTrope. He once read a ''very long-winded'' book on psychology to understand human relationships better. His notes for a time became nonsensical to Colin, in fact it messed him up so bad, he vowed to never read it again. Puro's a {{Bookworm}}, so it must've been an horrendous publication.
* ThisIsMyHuman: How Puro feels about Colin, whether wanting to absorb [[TrueCompanions or befriend him]], and gets enraged if any other latex monster tries to abduct his human away from him.
* ThrowTheBookAtThem: When he arrives to save Colin from the Behemoth, his attempt at stopping the large light-latex is to throw his book at it. This does nothing except temporarily confuse the Behemoth.
* UnwantedAssistance: Puro means well but can easily distract the player trying to keep tabs on latex hazards. This does result in one instance where in the Special Edition, Colin gets transfurred by a snake-like monster in the ventilation duct.
* UpliftedAnimal: Upon their escape and consequent takeover of the facility, Puro gradually fell out of the primordial desires of his peers' hunger to 'transfur' other humans and instead found himself scouring the library with a newfound sense of [[IntriguedByHumanity curiosity and awareness]] in humankind.
* WalkingTheEarth: In the "ESC" ending he joins Colin to have the journey he always dreamed about having when reading his cherished adventure books.
* WeNeedADistraction: Helps Colin escape the Ming Cat via a cardboard cutout. Also willingly offers to lure the light-latex beasts away in the Latex Forest so they won't try to transfur Colin.
* WhoWantsToLiveForever: Puro himself is immortal but isn't immune to this conundrum, being a self-made UpliftedAnimal, and fears his dark-latex regeneration cycle will [[DeathOfPersonality destroy his sapience]] when he reverts into a crystalline form and then back again.
* YouCantGoHomeAgain: He's a [[RogueDrone lone wolf]] who abandoned his fellow wolf monsters in favor of exploring the compound and learning about humans. His species [[ThisIsUnforgivable will not forgive this]] nor [[AllOfTheOtherReindeer allow him to return]] even if he were to one day lose his sentience.
** In ''Special's'' No Trust ending he resigns himself to failure, for not being able to imitate or befriend humans before looking to return to his kind. Puro only aborts when he comes across [[WasOnceAMan what was once]] Colin in the vents.
* YourDaysAreNumbered: Puro, being a dark-latex, can only survive on his own while inside the lab building. Otherwise, like the other Transfurs, he needs a human host to extend his lifespan. In the Easy Mode Betrayal ending, he caves in to his desire to survive and forcibly makes Colin his host. In the Can't Decide ending, Doctor K instead provided an artificial host, allowing him to live without having to consume his human friend.
* YourSoulIsMine: In the [[EasyModeMockery Easy mode]] ending, Puro wanting to avoid an UndignifiedDeath fully absorbs Colin into himself [[ThankYourPrey after apologising he's given into his yearnings]]. He feels the human's consciousness deep inside himself, as he beholds his stronger imperishable body [[WindowsOfTheSoul with Colin's eyes]].
[[/folder]]
[[folder:Dr. K]]
!!Dr. K
[[quoteright:260:https://static.tvtropes.org/pmwiki/pub/images/doctor_k_special.png]]
[[caption-width-right:260:[[labelnote:Click here to see Dr. K maskless.]]:https://static.tvtropes.org/pmwiki/pub/images/doctor_k_no_mask.png[[/labelnote]]]]
Dr. K is the main antagonist of ''Changed''. He is a scientist from before the events of the game, whom intentionally 'transfurred' himself using his own drug that would allow its user to retain their memories and free will. He tries multiple times to contain Colin, who he believes may reintroduce [[ThePlague the Pale Virus]], to the outside world.
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* AdaptationalJerkass: Subverted. His early presence and messages to Colin are much harsher in the ''Special Edition'' than in the vanilla game, demanding he simply lie down and let the first [[FedToTheBeast latex beast he sees]] assimilate him. Though he admits to the mainframe [=IGCT=] computer that he's merely pretending to be hostile in order [[CruelToBeKind to motivate the human]] to survive.
* AnimalsHateHim: Not hate per se, but being a 'transfurred' human who retained his identity and memories, the latex beasts are indifferent to him. While K's happy they're not seeking a [[DeathOfPersonality transfur fusion]] with him, being ignored often does make him [[TheAloner feel very alone]].
* AssimilationPlot: It was never his original goal, but thwarting the world-ending virus meant him and his team had little other choice. Played straight years later when Dr. K desperate to QuarantineWithExtremePrejudice pressures Puro over the library speakers to transfur Colin, who refuses, [[ThePowerOfFriendship as their friendship]] with the last human matters more than absorbing them.
* TheBeastmaster: Averted. The doctor retaining his identity whereas everyone else has transformed into latex beasts, is more than capable of becoming the "[[NormalFishInATinyPond one-eyed man in the kingdom of the blind]]", ''but he doesn't want this'', instead desiring to [[ProHumanTranshuman see mankind recover]] from the apocalyptic plague.
* BondBreaker: Often tries to drive [[BreakThemByTalking a wedge]] between Colin's and Puro's friendship over the course of the game. If he fails, he'll gripe the dark-latex beasts had [[FlawedPrototype always failed him]] before.
* CaptainsLog: Colin can find tape recordings he left lying around the complex as he tries to [[SoleSurvivor man the fort alone]], and [[NatureDocumentary study]] the behavioural patterns of the latex beasts.
* CaringGardener: The doctor's a proficient horticulturist, trimming and caring for all the trees and vegetation near his lab.
* CombatMedic: He tries to take out Colin with a sniper rifle loaded with mutagen cartridges. Emphasis on ''tries'' because he's not a skilled marksman and only synthesized enough for four shots.
* ConflictingLoyalty: ''Special Edition'' illustrates K is feeling [[MortonsFork the strain]] of trying to be a scientist, a ReasonableAuthorityFigure, and a human being. The mainframe [=IGCT=] terminal fears he's [[OutOfCharacterMoment behaving unethically]] towards Colin because he's either suffering from MotiveDecay, or has gone [[GoMadFromTheIsolation mad from loneliness]]. The doctor elucidates - he's ensuring lockdown to serve TheNeedsOfTheMany and not spread the Pale Virus again.
* CrazyPrepared: The Lab has several measures he implemented to prevent the escape of potentially infected human subjects. Even the clothes the subjects wear are a countermeasure for escape, as they're really [[LivingClothes dormant latex creatures]] that are programmed to be reactivated with special flashes of red light.
* DidYouActuallyBelieve: Berates Colin if he chooses to trust him over Puro in the ''Special Edition'' No Trust ending, before trapping the human in the white latex jungle. The doctor informs him he's a massive disappointment, and the dark-latex wolf, once the biggest thorn in the scientist's side is now too heartbroken to come to the human's rescue.
* DidntThinkThisThrough: If the doctor sincerely hopes humans will repopulate the Earth after the infected die off resulting in the extinction of the Pale Virus, he's overlooking [[LeftHanging one glaring fact]] - the latex beast creations have already escaped the tower and are likely forming their own complex ecosystems. If there are any human survivors left, his teams' monsters ''will'' find them.
* DontCelebrateJustYet: His colleagues wanted to observe New Years and celebrate their work on the Genetic Project. The doctor, so close to a breakthrough, refused to participate, knowing the sounds of fireworks would be [[JustBeforeTheEnd replaced with firearms]] when the angry masses would storm the complex for a cure.
* EmergencyTransformation: He was among many bioengineers trying to save a dying humanity from the Pale Virus. The only way they could immunize the population to this incurable disease was through TheAssimilator abilities of the Transfurs latex goo monsters, but their creations caused a DeathOfPersonality for any test subject. Ultimately, they succeeded in creating the technology that would allow this trope, ''but it was too late'' - the lab was attacked by mass riots and consumed by escaped Transfurs before they could roll it into mass-production. Dr. K was the only scientist who got to use it before all hell broke loose.
* EmptyEyes: K has this perpetual "dead-inside" expression throughout the entire game, even when feigning happiness; he failed to FindTheCure during the pandemic; takes no pride in sullying Colin's and Puro's friendship, and being forced to make immoral decisions to [[QuarantineWithExtremePrejudice isolate away the protagonist]]. The only [[EyeTake sincere reaction]] he gives, is for the "ESC" ending when Colin is willing to sacrifice his humanity to stop the Pale Virus.
* EveryoneHasStandards: Except for Puro [[WhatMeasureIsANonHuman who is expendable]], K doesn't resort to gratuitous violence to accomplish his goal of containing Colin away from the outside world. The doctor switches on floor rotary fans to dissuade the human from proceeding. Should Colin [[DeathSeeker step forward]], K immediately shuts them down prompting [[WhatTheHellHero the appropriate response]]. It's also the reason why he gives the human a fighting chance to survive and not set up a HopelessBossFight scenario.
* TheEvilsOfFreeWill: Desperate to stop Colin, he argues the human would be happier off losing his individuality inside a latex beast, rather than pointlessly dying alone in the wastelands.
* FlingALightIntoTheFuture: What he hopes he's accomplished in the "ESC" ending by saving Colin with his [[SavedByThePhlebotinum latex mutagen]] and supplying Puro with a 'biorobot'. Though human civilization [[AfterTheEnd lays in ruins]] after the pandemic, the deuteragonists will not die of old age now, leaving ample time to rebuild for the dawn of a new age.
* FourthWallObserver: In the ''Special Edition'' he'll make note of the number of steps taken after emerging from cryogenic slumber, to the total of [[SavePoint saved games]] used.
* GasMaskLongcoat: Check, and [[ExactlyWhatItSaysOnTheTin check]].
* HumansAreBastards: Does some very unethical things to keep the Pale Virus contained.
* ImprobableAge: According to WordOfGod, Dr. K is ''almost'' 30 years old, meaning he was in his mid-twenties when part of the bioengineering team working to [[FindTheCure stop the Pale Virus]]. To be an authoritative figure among the scientists on such a mission of utmost importance, K would've been nothing short of [[TeenGenius a child prodigy]].
* IDidWhatIHadToDo: K's not a MadScientist nor is he proud of the things [[TestedOnHumans he had to do]] to combat a devastating pathogen, nevertheless argues he did so for [[WellIntentionedExtremist the greater-good]].
* JerkassHasAPoint: In the Special Edition. If Puro has a poor relationship with Colin, even the dark-latex wolf silently acknowledges in the flooded generator rooms, Dr. K speaks the truth about [[HumansAreBastards humans' apparent coldheartedness]].
* JerkassToOne: Can't stand Puro and refers to him as a "[[MyGreatestFailure failure]]" at best and [[MoreExpendableThanYou and expendable]] at worst. This angers the dark-latex beast since he's an UpliftedAnimal. Justified in that Dr. K's mission was never to [[CreatingLifeIsUnforeseen create a new lifeform]], it was to save the human race [[FindTheCure from extinction]].
* KnowWhenToFoldEm: Gives up trying to stop Colin and Puro going together in the 'Leave ending', as he can't fight them both. K laments everything he ever did to stop the Pale Virus was AllForNothing before returning to his office in defeat.
* MagicAntidote: Averted. His colleagues and he couldn't find a cure for the virus, as it exploited fundamental flaws in the human genome.[[note]]8% of our DNA is made up of Endogenous retroviruses after all[[/note]] The only way out was to alter the very makeup of humans themselves since animals proved immune to the pathogen. Combining lab animal DNA into their latex goo experiments, brought about creatures that could assimilate [[TestedOnHumans and change people]], but it resulted in a DeathOfPersonality. He did eventually find a better method, but it was too late to save the civilization he grew up in.
* MindControl: There's nothing he can do for former-humans who were '[[ThereIsNoCure transfurred]]' and suffered DeathOfPersonality, but he has been experimenting with the latex. K developed a mutagen where the subject is void of free-will and [[BlindObedience completely obedient]] to his commands; using this [[SycophanticServant on Colin]] in the bad endings.
* MyGreatestFailure: Being unable to stop [[FindTheCure the Pale Virus]], and is now the only living testament to the 'Genetic Project'. He wanted to save humanity, but in the end was only able to save himself.
* MysteriousBacker: Heartwarmingly, the doctor was watching over Colin for years, ensuring the youth's capsule didn't have a CryonicsFailure.
* NotWithThemForTheMoney: The Doctor keeps in regular contact with the ultra-rich and world leaders who've [[TheElitesJumpShip retreated to a secret bunker]], not for wanting power or favours, but because he desires to see mankind re-emerge triumphant against the viral apocalypse.
* NoFairCheating: He'll call Colin out over the intercom if he decides to wear a disguise Puro made for Colin to sneak past the toughest areas of the Dark-Latex beasts' territory. The monsters [[RevealingCoverup don't catch on]], since they can't understand the human language.
* NominalVillain: He's trying to save the [[SafeZoneHopeSpot last of humanity]] from an extinction event that [[TyphoidMary the infected Colin]] threatens to bring about.
* ProfessorGuineaPig: Dr. K began experimenting upon himself when he ran out of time and human "[[TestedOnHumans volunteers]]". Luckily it worked and although [[WasOnceAMan his body was irreversibly changed]], his mind was left intact.
* ProHumanTranshuman: Although [[EmergencyTransformation becoming one with]] the "[[SavedByThePhlebotinum K batch]]" of light-latex goo to avoid succumbing to ThePlague, the doctor retains his sanity and rationale. He's hostile [[MyGreatestFailure towards Puro]], and ''[[TyphoidMary especially Colin]]'', but desires to see humanity bounce back from the apocalypse and talks regularly with the ultra-rich and world leaders in [[TheElitesJumpShip their secret bunker retreat]].
* ProperlyParanoid: He never takes his mask off, almost as if it's a memento to his days as a former-human scientist, even though he's essentially immortal and immune to disease. [[WordOfGod In actuality, it's solely to suppress his newly amplified sense of smell after he had undergone]] [[EmergencyTransformation the transfur procedure]].
* QuarantineWithExtremePrejudice: Dr. K is willing to go to ''great lengths'' to prevent Colin from reintroducing the [[ThePlague Pale Virus]] to the outside world. [[WellIntentionedExtremist It's hard to argue against him]], given this pathogen ended modern civilization several years ago.
* RasputinianDeath: Slowly succumbing to the Pale virus, and being shot up pretty badly during the riots, he took the K mutagen to save himself. He woke three days later transformed and [[ImmuneToBullets the bullets fell out]] of his new body.
* SensoryOverload: As a latex beast his sense of smell has become ''so acute'' that he finds odours very off-putting. K is always seen wearing a gas mask to suppress aromas and scents.
* SinisterSurveillance: He watches Colin's every step from the moment the young man emerges out of his cryogenic capsule. It rapidly starts getting on the [[TheMillstone human's nerves]] as the doctor interrupts their progress.
* SoleSurvivor: Of the bioengineering science team working to stop the Pale Virus pandemic.
* SycophanticServant: Turns out Dr. K as the SoleSurvivor of the research team is having difficulty maintaining the entire tower complex all by himself. He hopes he can turn Colin into an obedient animal that'll obey his commands via 'transfurmation' and the [[NonStandardGameOver success of this]] varies depending on the method/mutagen used.
* TakeAThirdOption: Ultimately he's able to devise [[SavedByThePhlebotinum a better solution]] for all parties when Colin himself cannot decide to [[ButNowIMustGo leave]] or [[IChooseToStay stay in]] the tower.
* TheyCallHimSword: He has no NoNameGiven, all the machines refer to him as "Dr. K", but "K" is merely the name of the latex mutagen [[ProfessorGuineaPig he used upon himself]] to avert death from the Pale Virus infection.
* TranshumanTreachery: Subverted. He's not an escaping experiment that wants to absorb you, and is only antagonistic towards Colin, by attempting to [[FedToTheBeast feed him to the latex goo beasts]], because he's trying to serve TheNeedsOfTheMany beyond the tower complex.
* WasOnceAMan: Once a brilliant scientist he's now a latex wolf-like creature with light, dense, soft fur, the only vestiges he ever was human are his clothes and intact-intelligence.
* WellIntentionedExtremist: The Doctor is willing to do anything to keep the virus from being reintroduced to the world, and when he suspects Colin of being a possible carrier, he'll resort to [[QuarantineWithExtremePrejudice imprisonment]] or [[ItsTheOnlyWayToBeSure forceful transformation]] to keep him from leaving.
* WhatHappenedToTheMouse: It's not known what happens to him after the events of any of the ''Special Edition's'' Betrayal endings, as he breaks off all communication with the deuteragonists.
* WhiteWolvesAreSpecial: With his transfurred appearance and big ears he looks like a fennec fox. Confirmed by WordOfGod, that the scientist used a wolf-like latex batch to save himself. However, the doctor is not a NobleWolf for most of the game, antagonistic towards the deuteragonists.
* WorthyOpponent: He acknowledges Colin as such after his sniper attack fails.
* YouAreWhatYouHate: He's not pleased he had to transfur himself with his [[MutagenicGoo own mutagen]] in order to survive the Pale Virus, nevertheless since he doesn't carry the deadly virulent considers himself ''more human'' than the protagonist.
[[/folder]]
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[[WMG:[[center: [-''VideoGame/Changed'' '''[[Characters/Changed Main Character Index]]'''\\
'''Main Characters''' | [[Characters/ChangedLatexSpecies Latex Species]] | [[Characters/ChangedTheMonsters The Monsters]] | [[Characters/ChangedMinorCharacters Minor Characters]] | [[Characters/ChangedOtherCharacters Other Characters]]-]]]]]
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[[foldercontrol]]
!!!The main cast
[[folder:Colin]]
!!Colin
[[quoteright:217:https://static.tvtropes.org/pmwiki/pub/images/colin_special.png]]
[[caption-width-right:217:[[labelnote:Click here to see Colin in one of the bad endings.]]:https://static.tvtropes.org/pmwiki/pub/images/colin_bad_ending_special.png[[/labelnote]]]]
[[caption-width-right:217:[[labelnote:Click here to see Colin in the True Ending.]]:https://static.tvtropes.org/pmwiki/pub/images/colin_true_ending.png[[/labelnote]]]]
[[caption-width-right:217:[[labelnote:Click here to see the benign latex.]]:https://static.tvtropes.org/pmwiki/pub/images/benign_latex.png[[/labelnote]]]]
[[caption-width-right:217:[[labelnote:Click here to see Puro's disguise.]]:https://static.tvtropes.org/pmwiki/pub/images/puro_disguise.png[[/labelnote]]]]
Colin, also known as "Human" by Puro, is the main protagonist and player character of ''Changed''.
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* ActionSurvivor: Colin is relatively skinny, has amnesia, has no clue what is going on at the labs, and is facing latex creatures who can absorb or transform him [[TouchOfDeath with a touch]]. All he has going for him is his wits, relatively fast speed compared to most of the other creatures, and Puro's help. That's all he needs.
* AlternateIdentityAmnesia: In one of the ''Special Edition'' bad endings, he gets transfurred into a white latex creature and temporarily suffers DeathOfPersonality. Puro recovers him somewhat, but it's implied he's completely lost his memory and merely kept his NiceGuy personality.
* AmnesiacHero: He's been in cryogenic stasis for so long, he can't remember how he ended up in the tower or who's been taking care of him.
* AndIMustScream: His fate if any creature chooses to absorb him rather than transfur. His body and organs get digested inside the latex beast. Yet he's still alive, [[CagedInsideAMonster trapped deep inside]] the now-immortal monster, unable to ever escape or exert his will over the captor, leaving him an immobile prisoner.
* AndThenJohnWasAZombie: Almost every latex creature in the building turns him into one of them if they're not outright assimilating him. He also ends up being turned into a dark or white latex wolf in every ending except "I Choose To Stay" and "I Choose To Leave".
* BabyTalk:
** In ''Special Edition's'' bad endings where he's 'transfurred' but keeps some small shred of his memories, Colin communicates with Puro with sounds, gurgles, and gibberish.
** In a different bad ending, he gets 'transfurred' into a white latex creature, and is barely able to sound out Puro's name. Puro promises to teach him speech all over again.
* BlindfoldedVision: As part of the Genetic Project's [[QuarantineWithExtremePrejudice precautionary measures]], the Benign Latex he wears will restrain him if it awakens, immobilises him with [[PrehensileTail its long tail]], and blindfolds him, all so he can't escape or pose a danger to any other humans. [[note]]The creature lacks the sentience needed to know there are none remaining.[[/note]]
* ABoyAndHisX: A young man and his adorkable BlobMonster.
* ControllableHelplessness: There'll be instances where the player won't immediately lose control of Colin as he succumbs to double transfur fusions or other, but by then, it's already [[YouAreAlreadyDead too late for him]].
* DeathOfPersonality: Many of the game-overs drive home this fact, if any creatures capture and assimilate him in the infested labs he loses his independence and individuality, ''forever''.
* DisposableVagrant: Dr. K considers him this, a poor nobody whose fight for survival is jeopardizing the goals of the world leaders to restart mankind and civilization.
* DyingAsYourself: He passes away in the "Leave" ending, finally succumbing to the lethal virus Dr. K feared he was carrying. As the [[ShowDontTell Steam achievement shows]], Puro sadly cares about his human friend's determination so much, the latex wolf doesn't assimilate him, burying him among the ruins instead.
* EyesAreMental: He's the only creature in the lab with blue eyes outside of the Tiger Shark, who WasOnceAMan. Notably, his eyes stay blue whenever he gets 'transfurred' but is implied or confirmed to have not suffered DeathOfPersonality, only having them change colour when he's definitely no longer himself.
* FailedASpotCheck: He has no idea the pants he wears are actually a dormant latex creature, designed by Thunder Science to act as a RestrainingBolt in the unlikely event of his escape from the testing area. Even Puro doesn't realize, only noting there's a "familiar goo scent" about them. The machines however, detect its presence much to the deuteragonists confusion.
* ForcedTransformation: Colin gets turned into numerous different species depending on what captures him, with varying levels of brainwashing added in.
* FountainOfYouth: In the ''Special Edition'', touching one of the large black crystals in the dark-latex wolf territory causes Colin's body to split apart into a handful of dark-latex wolf pups. While the rest appear to be as mindless and feral as every other dark-latex wolf, one has [[EyesAreMental blue eyes]] like Colin and is shown looking at their paw in confusion, suggesting Colin's mind was transferred into that one pup.
* GenderBender: Sometimes falls prey to this depending on the creature that assimilates him, and sometimes he's [[GenderBenderAngst not happy]] about it.
* GenderBenderAngst: If two latex bunnies transfur into him together, he becomes a female latex rabbit. Colin's immediate reaction upon noticing her new gender is to cover her breasts while blushing profusely.
* HalfDressedCartoonAnimal: Because he already wears nothing but a pair of benign latex shorts, every transfur that doesn't end up destroying or removing them results in him becoming one of these.
* TheHeroDies: In the "I Choose To Leave" ending, he is confirmed to have [[ThePlague the Pale virus]] and dies from it next to Puro while watching the sunset. The achievement icon shows Puro buried his human friend, with his own fate left unknown, but not looking good.
* HeroicMime: Has very few, if any, lines of dialogue, and mostly conveys his feelings through {{Pictorial Speech Bubble}}s.
* HeterosexualLifePartners: Becomes this with Puro in the GoldenEnding.
* HumanPopsicle: Colin was one of many [[TestedOnHumans test subjects]] placed into cryogenic stasis for experimentation with the latex beasts and/or until a solution was found for the Pale Virus. After several years his capsule kicks him out due to CryonicsFailure as the escaped goo monsters travelling through the ducts mess with the room's wiring.
* IChooseToStay: In one of the endings Colin can listen to Dr. K and choose to not leave with Puro. It's a TearJerker as the monster companion [[WhatTheHellHero calls Colin out for not keeping his promise]] to see the outside world with him. As he sadly leaves the building alone, Colin's doomed himself to become a HumanPopsicle as the Doctor tries in vain to treat an incurable disease, while Puro will suffer a DeathOfPersonality soon without a host.
* IJustWantToBeFree: He wants to escape the tower complex to the outside world, knowing there may be nothing for him out in the ruins. Everytime a latex creature captures and starts assimilating him, it's always an [[FightingFromTheInside unwilling transformation]], but there's nothing he can do to fight back against these predators once in their clutches.
* ImNotHereToMakeFriends: He can choose to not thank Puro when helped, and [[FriendshipDenial ignore the friendly wolf]] at every opportunity, but this will have [[AssimilationPlot life-changing consequences]] for him later in the game.
* JumpingTheGenderBarrier: Several transfurs while Puro is accompanying Colin will have the transfurred latter flirting with or seducing Puro in the transfur screen. Puro's reaction to this occurring is typically confusion.
* TheKlutz: The adolescent often slips on rubbish or manages to get himself into predictments that attract the attention of the latex beasts.
* LastOfHisKind: Subverted. Colin is a TokenHuman in the game as the human race is virtually wiped out from the Pale Virus pandemic. There are the ultra-rich and world leaders who've [[SafeZoneHopeSpot bunkered down]] in an undisclosed location to weather out the apocalypse in hopes Dr. K can find a better solution.
* LivingClothes: In the ''Special Edition'', his black pants are really a [[HidingInPlainSight dormant latex creature]] that were [[CrazyPrepared programmed]] to awaken [[RestrainingBolt and restrain]] from scanning laser lights should subjects like him ever try to escape.
* TheMindIsAPlaythingOfTheBody: Most, but not all, of the transfurmations he undergoes he soon quickly happily embraces, [[ThatManIsDead forgetting he ever was human]].[[note]]The one definite exception is in the True Ending, in which Dr. K gives him the same transfurmation he [[ProfessorGuineaPig subjected himself to]], which cures Colin of his plague while leaving his mind intact.[[/note]]
* MorphicResonance: Downplayed. Some of the 'transfurmations' he suffers will have him retain his eye color and hairstyle.
* MysteriousPast: We don't know much of his teenage life before he was put into CryoPrison, except that he was happy and [[IgnoranceIsBliss largely unaware]] of the global pandemic.
* NoOneShouldSurviveThat: Even Dr. K [[LeaningOnTheFourthWall lampshades]] Colin's up against insurmountable odds in trying to escape the lab facility. It's ''swarming'' with [[BlobMonster escaped experiments]] that want to consume him on sight.
* NoSell: He tries to avenge Puro by assaulting Dr. K for killing Puro's [[DeathOfPersonality sentience]] and reducing him to his [[BroughtDownToNormal dark-latex default form]] if their relationship isn't sufficiently high. As the doctor is more flexible and healthy by comparison, this backfires.
* NotQuiteBackToNormal: When he manages to pull off a traffic cone latex attempting to assimilate him in ''Special Edition'', he manages to remove it, but his body underneath has been altered. His shorts are gone, he has white fur all over, and he also has a tail, snout, animal ears, and paws, indicating that the traffic cone latex turned his inner body into some kind of canine-like latex.
* OddFriendship: He sparks one with Puro, a dark-latex wolf, one of the latex beasts that instinctively hunt down humans to [[TheAssimilator assimilate]] or [[TheVirus transfur]] them.
* OnlyFriend: As anyone he once knew before the pandemic is now either dead or transfurred, Puro becomes this for him when properly befriended.
* PaperThinDisguise: Towards the end of the offices in ''Special Edition'', he can find and don a dark-latex wolf costume to get through the dark-latex wolf crowd undetected. The costume is poorly made, and is so unlifelike that ''every'' latex wolf present is confused by it, but it's just barely convincing enough that they don't attack Colin.
* PeoplePuppet: The Wolf King turns him into one if he catches the human with one of his crystals during his boss fight. The transfur screen depicts the human, seemingly having suffered DeathOfPersonality, being turned [[HalfHumanHybrid halfway into a dark-latex wolf]] and toyed with for the Wolf King's amusement.
* ThePlague: He doesn't realize he carries the deadly incurable Pale Virus and it's slowly killing him.
* SavedByThePhlebotinum: In the "ESC" ending, Doctor K injects a [[MutagenicGoo mutagenic latex serum]] into Colin that he once tested [[ProfessorGuineaPig upon himself]]. Though it irreversibly changes the human's body into a light-latex wolf-like beast, it successfully eradicates the Pale Virus, and preserves Colin's mind without any adverse side effects.
* TheStoic: Lampshaded by Dr. K, Colin always has a calm, cool and collected expression on his face.
* SuperDrowningSkills. He can't swim. Falling into deep water always results in him sinking like a stone, though (un)luckily he never drowns as aquatic latex beasts will always "[[EmergencyTransformation save]]" him.
* UngratefulBastard: Dr. K will [[WhatTheHellHero berate Colin if]] he leaves Puro behind heartbroken after saving him from the Squid Pups. Him proceeding without showing Puro gratitude secures the Betrayal ending, as K is able to convince the dark-latex beast to assimilate Colin.
* UnwittingTestSubject: He was brought into the complex years ago as a mere test subject for the Genetic Project. Puro himself later confesses the reason why he's left sticky notes and hazards early-on, because he wanted to test the human's strengths to see if they were a worthy host to assimilate.
* VagueAge: According to WordOfGod, Colin's chronologically aged 23, meaning he was [[UnwittingTestSubject abducted as a teenager]] before becoming a HumanPopsicle pending experimentation.
* WalkingShirtlessScene: Colin wears nothing but a pair of pants throughout the entirety of the game.
* WeakButSkilled: Noted by Puro, Colin's not [[MusclesAreMeaningful physically strong]], unable to move heavy metal crates, but the young man is ''a very athletic runner''. Colin can surprisingly move at the same speed [[LightningBruiser as Yuin]]. The problem? He's hungry, the Pale Virus is slowly killing him, and [[PowerUpFood any food]] needed to give him an energy burst, [[BoxAndStickTrap is the obvious trap]] of a latex beast lying in wait.
* WhiteWolvesAreSpecial: In the ESC ending, Dr. K uses the same wolf latex batch on Colin he used to save his life from the Pale virus. After three days in observation, he loses his humanity, but keeps all his memories and identity. Puro still adorably calls him "Human".
* WhyDidItHaveToBeSnakes: In the Special Edition it is showcased he has Ophidiophobia, so any snake-like latex creature latching onto Colin will cause the young man to run around freaking out before being inevitably 'transfurred'.
* WorthyOpponent: The Wolf King seems to see the human as this, as surviving long enough before being transfurred in his boss fight will have him choose to accept the transfurred Colin into his pack as opposed to making him a PeoplePuppet.
* YourDaysAreNumbered: The "I Choose to Leave" ending, this is true for Colin as well as Puro. As Dr. K suspected, he was indeed carrying the Pale Virus that devastated the world, and by the ending, he [[DyingAsYourself finally perishes from it]] just hours after exiting the building.
[[/folder]]
[[folder:Puro]]
!!Puro
[[quoteright:191:https://static.tvtropes.org/pmwiki/pub/images/puro_changed_7_2.png]]
[[caption-width-right:191:[[labelnote:Click here to see Puro in the worst ending.]]:https://static.tvtropes.org/pmwiki/pub/images/puro_bad_ending.png[[/labelnote]]]]
[[caption-width-right:191:[[labelnote:Click here to see Puro in the bad ending.]]:https://static.tvtropes.org/pmwiki/pub/images/puro_bad_ending2_6.png[[/labelnote]]]]
[[caption-width-right:191:[[labelnote:Click here to see Puro in the captured ending.]]:https://static.tvtropes.org/pmwiki/pub/images/poor_puro.png[[/labelnote]]]]
Puro is the deuteragonist of ''Changed''. He is a friendly dark latex wolf-like creature, the only [[WhiteSheep seemingly benign monster]] that doesn't want to absorb you on sight. He's capable of speech and helps Colin throughout the game.
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* AmbiguousGender: Despite being an ordinary dark-latex wolf, he displays characteristics of both genders. His mask is shaped like a female dark-latex wolf's and he possesses the fluffy tail and [[TuftOfHeadFur hair fur]] that females do, but he has no visible mammaries and claims to be male.
* TheAssimilator: All latex creatures are driven by impulse and instinct on a cellular-level to swallow up any human on sight. Puro mostly resists this, though warns Colin to never suddenly jump on, or accidentally bump into him, otherwise he'll absorb him instantly and involuntarily.
* AssimilationPlot: A low relationship with Puro sees the Betrayal ending playing out. After reaching the end of the Aquatic Area, he'll give up hope of escaping the building alive, as without a host body, he doesn't have long to live before regeneration [[DeathOfPersonality destroys his newfound sapience]]. Revealing he always doubted Colin could survive with the world outside devastated. Hoping to spare his friend and himself from dying [[DyingAlone ignoble and lonely deaths]], he opts to "transfur" Colin personally, trapping him in a hallway with no escape. The latter has been running from barely sentient monsters, and should know how [[YouWillNotEvadeMe utterly screwed he is]] [[OhCrap at this point]]. The [[EasyModeMockery worst possible outcome]] is Puro fully assimilating Colin into himself. The second worst has him instead turn the latter into a blue-eyed [[TwoSiblingsInOne version of himself]], referring to him as an [[HumanPet extension of his being under his control]]. Only ThePowerOfFriendship and playing on Normal mode can avert this.
* BigBrotherInstinct: After assimilating Colin to be his new little brother in one of the ''Special Edition'' bad endings, Puro becomes a doting older brother figure for the [[BabyTalk non-verbal]] Colin, giving him words of encouragement when drawing pictures, and feeding him canned food in his den.
* BigDamnHeroes: Saves Colin on several occasions from stronger latex beasts threatening to engulf him.
* {{Bookworm}}: As a pup he was drawn to the Library, [[IntriguedByHumanity fascinated with human works]] unlike his brethren. After his kind rejected him for leaving, they became his only source of comfort during many lonely days and nights. Puro eventually becomes a BadassBookworm when protecting Colin from countless threats seeking to absorb him.
* CallToAgriculture: Wanting to emulate humans, Puro tried to start up his own farm, using white latex beasts he raised from blobs [[FantasticLivestock as livestock]] only to find they tasted ''terrible''.
* CruelToBeKind: How he considers Colin's fate when swallowing him up in the worst ending, as both are doomed to die without each other otherwise.
* DoubleKnockout: A strong relationship with Puro before the confrontation with Dr. K will ensure his survival as both fight each other to a stalemate.
* DreamCrushingHandicap: Considers himself weak and fragile without [[BodyAndHost a human host]] inside him. Puro's very disappointed when Colin emerges out of stasis to find he's [[MusclesAreMeaningful nowhere near as muscular]] as he fantasized him to be.
* EatingTheEnemy: His solution for dealing with a particularly persistent light-latex blob that refuses to surrender Colin. Amusingly he's so stuffed he asks his human friend [[CuriosityIsACrapshoot not to poke round anymore vents]] anytime soon.
* EccentricArtist: Puro's quite talented, and leaves all sorts of doodles and drawings lying around the complex for Colin to find.
* EdutainmentGame: The wolf-latex monster learned how to articulate and communicate words through a children's "Mr. Orange" educational toy made by the same robotics company that once rented the tower complex before the pandemic. Though admits writing was harder to learn and he often can't [[YouNoTakeCandle always grasp]] grammar or punctuation of the human language.
* TheExile: His own kind will [[IndividualityIsIllegal not accept him back]] after he willingly left their pack.
* FantasticRacism: Puro ''hates'' the light-latex goo creatures due to AnimalJingoism, and laments the competing species have never liked each other.
* GrowBeyondTheirProgramming: Whereas his dark-latex kind were regarded as a FlawedPrototype as pups by their human creators, Puro exceeded expectations as he eventually learned to read, write, talk, and even draw as he studied in isolation.
* HeroicSelfDeprecation: When a friendship blossoms between him and Colin, Puro will belittle himself at every given opportunity even when he's just [[BigDamnHeroes helped the human]] out of a jam. He'll sing Colin's praises, as the young man insists on [[YouAreBetterThanYouThinkYouAre showing him gratitude]].
* HeroicWannabe: Early on, he tried to script a scenario where he would appear to be an IdealHero, saving Colin from white latex tail-like monsters, but as the human requested he [[StalkerWithoutACrush stop following him everywhere]], it derailed the whole plan to impress his would-be friend. Dr. K [[PretenderDiss calls him out]] on this stating his ultimate goal was always an AssimilationPlot. If Colin befriends Puro properly, eventually the wolf does [[NobleWolf become noble]] and [[BecomingTheBoast heroic]] after all.
* HeterosexualLifePartners: Becomes this with Colin in the GoldenEnding.
* HorrorHunger: He's driven by a primordial desire of his species' hunger to 'transfur' other humans into themselves, only Colin showing he cares about him can stall these urges for the story's duration.
* HumansAreSpecial: Puro's a firm believer that humans are an amazing species bordering on the magical, that can do anything if they put their minds to it. He's unaware Colin [[HumansAreAverage isn't superhuman]], so asking for help or directions confuses the benign latex creature.
* IJustWantToBeBadass: He used to fantasize Colin [[MusclesAreMeaningful would be muscular]] when he finally arrived so when assimilated Puro would become so powerful he'd fear no man or beast ever again. A strong relationship with Puro reveals he's now more afraid [[PleaseDontLeaveMe of losing his only friend]], than the other latex creatures and will [[TookALevelInBadass do anything to protect]] his human.
* IJustWantToBeNormal: More than anything he wants to be human, some endings have him opt for the [[TheAssimilator next best thing]].
* IJustWantToHaveFriends: Puro has been alone for a long time, enough that his HorrorHunger is coming into conflict by a deeper need to have a companion. Already [[AllOfTheOtherReindeer ostracized by his own kind]], Colin picks up from the [[MysteriousBacker notes left by Puro]] his increasing anxieties and fears if the human doesn't like him when he arrives at the Library.
* IntriguedByHumanity: Puro loves everything about human culture and history, spending years alone reading books written by people long dead and gone.
* LongHairedPrettyBoy: Puro's build, unlike his more muscular dark-latex wolf kind, appears very feminine with long curly hair. He had to explain to Colin when they first met [[AmbiguousGender he's not female]]. He dreams of having a [[MusclesAreMeaningful burly body]] someday.
* MergerOfSouls: In one of the ''Special Edition'' betrayed endings a partially-befriended Puro will absorb Colin into himself, but thereafter refers to himself as neither Colin nor as Puro. He regards both individuals that make him up as the two former-lives he once had, before becoming an entirely new being.
* MisunderstoodLonerWithAHeartOfGold: If you get to know him, he's a big shy sweetheart.
* MortalityPhobia: Latex monsters after an indeterminate period will regenerate into [[{{Reincarnation}} their base forms and back again]] infinitely, without [[BodyAndHost human hosts]]. If they assimilate someone, they'll [[ShapeshifterModeLock halt this cycle]], evolve, and quickly embrace the fact [[LivingForeverIsAwesome they'll live forever]] (by our standards). The goo beasts don't comprehend their [[BlessedWithSuck resetting lifespans]], but Puro ''does''. Fearing a DeathOfPersonality, he's [[ImmortalitySeeker become desperate to absorb someone]].
* MusclesAreMeaningful: Finally achieves the pecs he desired for so long in the ''Special Edition's'' worst ending, where Colin fails to befriend him but trusts him with his safety. Puro 'transfurs' Colin into himself directly, and becomes much bigger and aggressive in the closing cutscene.
* MysteriousBacker: Heartwarmingly, Puro was watching over Colin for years, ensuring Dr. K couldn't devise [[DeathIsTheOnlyOption a no-win scenario]]. The dark-latex wolf leaves notes and directions everywhere, blocking off dangerous routes, so the human will proceed to meet up in the Library. Even making Elder One [[ThePromise promise]] the dark-latex dragons would grant him safe passage if he proved his worth.
* NobleWolf: When fully befriended by Colin, Puro will do anything to protect him from being 'transfurred' by another Latex experiment.
* NonhumanSidekick: Gradually becomes a loyal companion and friend who dotes on Colin constantly during the course of their trek through the tower complex.
* NoSenseOfPersonalSpace: Comes with the inherent aptitude of being a BlobMonster, Puro's friendly, lonely, and often excitedly up in Colin's face.
* ObfuscatingStupidity: He's no fool. Having spent years reading books about the world and human civilization he knows just from a glance the world is already doomed, and only accompanies Colin to kill time.
* OnlyFriend: If a strong relationship with Colin flourishes, Puro will openly declare this, remarking he will follow his beloved human, forever.
* PickyEater: Puro loves only sweet juicy delectables, and detests anything bitter. The oranges grown in the greenhouse [[LethalChef by Prototype]] made him pass out, and the wolf never returned there to eat again.
* ThePowerOfFriendship: If Colin spends time and shows Puro he cares about him, the latex wolf monster will develop feelings for him, and actively resist trying to assimilate his human friend for the remainder of their adventure, [[PredatorTurnedProtector even protecting Colin from other monsters]] looking to absorb him.
* RougeAnglesOfSatin: In the Special Edition, which otherwise mostly resolved the previous version's TranslationTrainwreck, his notes to the player are full of conspicuous typos. Though he's relatively eloquent in person.
* RogueDrone: As a cub he broke off from his dark latex wolf HiveMind to read books in the Library. He still longed to absorb a human for himself very badly, but as Puro ''[[CuriosityCausesConversion absorbed himself]]'' in his reading, the wolf goo developed a [[IntriguedByHumanity fascination for mankind]], now longing to [[IJustWantToHaveFriends befriend]] the protagonist.
* SecretTestOfCharacter: He later confesses the reason why he's left sticky notes everywhere and hazards early-on for Colin, because he was wrestling with his animal instincts and newfound conscience. Puro wanted to test the human's strengths to see if they were a host worthy of assimilating.
* SuperNotDrowningSkills: The dark-latex wolf monster cannot swim, his body's cellular density is too great, but since he doesn't need to breathe underwater it's of little concern besides [[HatesBaths getting his tail wet]].
** Averted as of the ''Special Edition'' where Puro does the doggy paddle, but since he wants to imitate humans finds it embarrassing more so since Colin saw the whole spectacle.
* TheShrink: DefiedTrope. He once read a ''very long-winded'' book on psychology to understand human relationships better. His notes for a time became nonsensical to Colin, in fact it messed him up so bad, he vowed to never read it again. Puro's a {{Bookworm}}, so it must've been an horrendous publication.
* ThisIsMyHuman: How Puro feels about Colin, whether wanting to absorb [[TrueCompanions or befriend him]], and gets enraged if any other latex monster tries to abduct his human away from him.
* ThrowTheBookAtThem: When he arrives to save Colin from the Behemoth, his attempt at stopping the large light-latex is to throw his book at it. This does nothing except temporarily confuse the Behemoth.
* UnwantedAssistance: Puro means well but can easily distract the player trying to keep tabs on latex hazards. This does result in one instance where in the Special Edition, Colin gets transfurred by a snake-like monster in the ventilation duct.
* UpliftedAnimal: Upon their escape and consequent takeover of the facility, Puro gradually fell out of the primordial desires of his peers' hunger to 'transfur' other humans and instead found himself scouring the library with a newfound sense of [[IntriguedByHumanity curiosity and awareness]] in humankind.
* WalkingTheEarth: In the "ESC" ending he joins Colin to have the journey he always dreamed about having when reading his cherished adventure books.
* WeNeedADistraction: Helps Colin escape the Ming Cat via a cardboard cutout. Also willingly offers to lure the light-latex beasts away in the Latex Forest so they won't try to transfur Colin.
* WhoWantsToLiveForever: Puro himself is immortal but isn't immune to this conundrum, being a self-made UpliftedAnimal, and fears his dark-latex regeneration cycle will [[DeathOfPersonality destroy his sapience]] when he reverts into a crystalline form and then back again.
* YouCantGoHomeAgain: He's a [[RogueDrone lone wolf]] who abandoned his fellow wolf monsters in favor of exploring the compound and learning about humans. His species [[ThisIsUnforgivable will not forgive this]] nor [[AllOfTheOtherReindeer allow him to return]] even if he were to one day lose his sentience.
** In ''Special's'' No Trust ending he resigns himself to failure, for not being able to imitate or befriend humans before looking to return to his kind. Puro only aborts when he comes across [[WasOnceAMan what was once]] Colin in the vents.
* YourDaysAreNumbered: Puro, being a dark-latex, can only survive on his own while inside the lab building. Otherwise, like the other Transfurs, he needs a human host to extend his lifespan. In the Easy Mode Betrayal ending, he caves in to his desire to survive and forcibly makes Colin his host. In the Can't Decide ending, Doctor K instead provided an artificial host, allowing him to live without having to consume his human friend.
* YourSoulIsMine: In the [[EasyModeMockery Easy mode]] ending, Puro wanting to avoid an UndignifiedDeath fully absorbs Colin into himself [[ThankYourPrey after apologising he's given into his yearnings]]. He feels the human's consciousness deep inside himself, as he beholds his stronger imperishable body [[WindowsOfTheSoul with Colin's eyes]].
[[/folder]]
[[folder:Dr. K]]
!!Dr. K
[[quoteright:260:https://static.tvtropes.org/pmwiki/pub/images/doctor_k_special.png]]
[[caption-width-right:260:[[labelnote:Click here to see Dr. K maskless.]]:https://static.tvtropes.org/pmwiki/pub/images/doctor_k_no_mask.png[[/labelnote]]]]
Dr. K is the main antagonist of ''Changed''. He is a scientist from before the events of the game, whom intentionally 'transfurred' himself using his own drug that would allow its user to retain their memories and free will. He tries multiple times to contain Colin, who he believes may reintroduce [[ThePlague the Pale Virus]], to the outside world.
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* AdaptationalJerkass: Subverted. His early presence and messages to Colin are much harsher in the ''Special Edition'' than in the vanilla game, demanding he simply lie down and let the first [[FedToTheBeast latex beast he sees]] assimilate him. Though he admits to the mainframe [=IGCT=] computer that he's merely pretending to be hostile in order [[CruelToBeKind to motivate the human]] to survive.
* AnimalsHateHim: Not hate per se, but being a 'transfurred' human who retained his identity and memories, the latex beasts are indifferent to him. While K's happy they're not seeking a [[DeathOfPersonality transfur fusion]] with him, being ignored often does make him [[TheAloner feel very alone]].
* AssimilationPlot: It was never his original goal, but thwarting the world-ending virus meant him and his team had little other choice. Played straight years later when Dr. K desperate to QuarantineWithExtremePrejudice pressures Puro over the library speakers to transfur Colin, who refuses, [[ThePowerOfFriendship as their friendship]] with the last human matters more than absorbing them.
* TheBeastmaster: Averted. The doctor retaining his identity whereas everyone else has transformed into latex beasts, is more than capable of becoming the "[[NormalFishInATinyPond one-eyed man in the kingdom of the blind]]", ''but he doesn't want this'', instead desiring to [[ProHumanTranshuman see mankind recover]] from the apocalyptic plague.
* BondBreaker: Often tries to drive [[BreakThemByTalking a wedge]] between Colin's and Puro's friendship over the course of the game. If he fails, he'll gripe the dark-latex beasts had [[FlawedPrototype always failed him]] before.
* CaptainsLog: Colin can find tape recordings he left lying around the complex as he tries to [[SoleSurvivor man the fort alone]], and [[NatureDocumentary study]] the behavioural patterns of the latex beasts.
* CaringGardener: The doctor's a proficient horticulturist, trimming and caring for all the trees and vegetation near his lab.
* CombatMedic: He tries to take out Colin with a sniper rifle loaded with mutagen cartridges. Emphasis on ''tries'' because he's not a skilled marksman and only synthesized enough for four shots.
* ConflictingLoyalty: ''Special Edition'' illustrates K is feeling [[MortonsFork the strain]] of trying to be a scientist, a ReasonableAuthorityFigure, and a human being. The mainframe [=IGCT=] terminal fears he's [[OutOfCharacterMoment behaving unethically]] towards Colin because he's either suffering from MotiveDecay, or has gone [[GoMadFromTheIsolation mad from loneliness]]. The doctor elucidates - he's ensuring lockdown to serve TheNeedsOfTheMany and not spread the Pale Virus again.
* CrazyPrepared: The Lab has several measures he implemented to prevent the escape of potentially infected human subjects. Even the clothes the subjects wear are a countermeasure for escape, as they're really [[LivingClothes dormant latex creatures]] that are programmed to be reactivated with special flashes of red light.
* DidYouActuallyBelieve: Berates Colin if he chooses to trust him over Puro in the ''Special Edition'' No Trust ending, before trapping the human in the white latex jungle. The doctor informs him he's a massive disappointment, and the dark-latex wolf, once the biggest thorn in the scientist's side is now too heartbroken to come to the human's rescue.
* DidntThinkThisThrough: If the doctor sincerely hopes humans will repopulate the Earth after the infected die off resulting in the extinction of the Pale Virus, he's overlooking [[LeftHanging one glaring fact]] - the latex beast creations have already escaped the tower and are likely forming their own complex ecosystems. If there are any human survivors left, his teams' monsters ''will'' find them.
* DontCelebrateJustYet: His colleagues wanted to observe New Years and celebrate their work on the Genetic Project. The doctor, so close to a breakthrough, refused to participate, knowing the sounds of fireworks would be [[JustBeforeTheEnd replaced with firearms]] when the angry masses would storm the complex for a cure.
* EmergencyTransformation: He was among many bioengineers trying to save a dying humanity from the Pale Virus. The only way they could immunize the population to this incurable disease was through TheAssimilator abilities of the Transfurs latex goo monsters, but their creations caused a DeathOfPersonality for any test subject. Ultimately, they succeeded in creating the technology that would allow this trope, ''but it was too late'' - the lab was attacked by mass riots and consumed by escaped Transfurs before they could roll it into mass-production. Dr. K was the only scientist who got to use it before all hell broke loose.
* EmptyEyes: K has this perpetual "dead-inside" expression throughout the entire game, even when feigning happiness; he failed to FindTheCure during the pandemic; takes no pride in sullying Colin's and Puro's friendship, and being forced to make immoral decisions to [[QuarantineWithExtremePrejudice isolate away the protagonist]]. The only [[EyeTake sincere reaction]] he gives, is for the "ESC" ending when Colin is willing to sacrifice his humanity to stop the Pale Virus.
* EveryoneHasStandards: Except for Puro [[WhatMeasureIsANonHuman who is expendable]], K doesn't resort to gratuitous violence to accomplish his goal of containing Colin away from the outside world. The doctor switches on floor rotary fans to dissuade the human from proceeding. Should Colin [[DeathSeeker step forward]], K immediately shuts them down prompting [[WhatTheHellHero the appropriate response]]. It's also the reason why he gives the human a fighting chance to survive and not set up a HopelessBossFight scenario.
* TheEvilsOfFreeWill: Desperate to stop Colin, he argues the human would be happier off losing his individuality inside a latex beast, rather than pointlessly dying alone in the wastelands.
* FlingALightIntoTheFuture: What he hopes he's accomplished in the "ESC" ending by saving Colin with his [[SavedByThePhlebotinum latex mutagen]] and supplying Puro with a 'biorobot'. Though human civilization [[AfterTheEnd lays in ruins]] after the pandemic, the deuteragonists will not die of old age now, leaving ample time to rebuild for the dawn of a new age.
* FourthWallObserver: In the ''Special Edition'' he'll make note of the number of steps taken after emerging from cryogenic slumber, to the total of [[SavePoint saved games]] used.
* GasMaskLongcoat: Check, and [[ExactlyWhatItSaysOnTheTin check]].
* HumansAreBastards: Does some very unethical things to keep the Pale Virus contained.
* ImprobableAge: According to WordOfGod, Dr. K is ''almost'' 30 years old, meaning he was in his mid-twenties when part of the bioengineering team working to [[FindTheCure stop the Pale Virus]]. To be an authoritative figure among the scientists on such a mission of utmost importance, K would've been nothing short of [[TeenGenius a child prodigy]].
* IDidWhatIHadToDo: K's not a MadScientist nor is he proud of the things [[TestedOnHumans he had to do]] to combat a devastating pathogen, nevertheless argues he did so for [[WellIntentionedExtremist the greater-good]].
* JerkassHasAPoint: In the Special Edition. If Puro has a poor relationship with Colin, even the dark-latex wolf silently acknowledges in the flooded generator rooms, Dr. K speaks the truth about [[HumansAreBastards humans' apparent coldheartedness]].
* JerkassToOne: Can't stand Puro and refers to him as a "[[MyGreatestFailure failure]]" at best and [[MoreExpendableThanYou and expendable]] at worst. This angers the dark-latex beast since he's an UpliftedAnimal. Justified in that Dr. K's mission was never to [[CreatingLifeIsUnforeseen create a new lifeform]], it was to save the human race [[FindTheCure from extinction]].
* KnowWhenToFoldEm: Gives up trying to stop Colin and Puro going together in the 'Leave ending', as he can't fight them both. K laments everything he ever did to stop the Pale Virus was AllForNothing before returning to his office in defeat.
* MagicAntidote: Averted. His colleagues and he couldn't find a cure for the virus, as it exploited fundamental flaws in the human genome.[[note]]8% of our DNA is made up of Endogenous retroviruses after all[[/note]] The only way out was to alter the very makeup of humans themselves since animals proved immune to the pathogen. Combining lab animal DNA into their latex goo experiments, brought about creatures that could assimilate [[TestedOnHumans and change people]], but it resulted in a DeathOfPersonality. He did eventually find a better method, but it was too late to save the civilization he grew up in.
* MindControl: There's nothing he can do for former-humans who were '[[ThereIsNoCure transfurred]]' and suffered DeathOfPersonality, but he has been experimenting with the latex. K developed a mutagen where the subject is void of free-will and [[BlindObedience completely obedient]] to his commands; using this [[SycophanticServant on Colin]] in the bad endings.
* MyGreatestFailure: Being unable to stop [[FindTheCure the Pale Virus]], and is now the only living testament to the 'Genetic Project'. He wanted to save humanity, but in the end was only able to save himself.
* MysteriousBacker: Heartwarmingly, the doctor was watching over Colin for years, ensuring the youth's capsule didn't have a CryonicsFailure.
* NotWithThemForTheMoney: The Doctor keeps in regular contact with the ultra-rich and world leaders who've [[TheElitesJumpShip retreated to a secret bunker]], not for wanting power or favours, but because he desires to see mankind re-emerge triumphant against the viral apocalypse.
* NoFairCheating: He'll call Colin out over the intercom if he decides to wear a disguise Puro made for Colin to sneak past the toughest areas of the Dark-Latex beasts' territory. The monsters [[RevealingCoverup don't catch on]], since they can't understand the human language.
* NominalVillain: He's trying to save the [[SafeZoneHopeSpot last of humanity]] from an extinction event that [[TyphoidMary the infected Colin]] threatens to bring about.
* ProfessorGuineaPig: Dr. K began experimenting upon himself when he ran out of time and human "[[TestedOnHumans volunteers]]". Luckily it worked and although [[WasOnceAMan his body was irreversibly changed]], his mind was left intact.
* ProHumanTranshuman: Although [[EmergencyTransformation becoming one with]] the "[[SavedByThePhlebotinum K batch]]" of light-latex goo to avoid succumbing to ThePlague, the doctor retains his sanity and rationale. He's hostile [[MyGreatestFailure towards Puro]], and ''[[TyphoidMary especially Colin]]'', but desires to see humanity bounce back from the apocalypse and talks regularly with the ultra-rich and world leaders in [[TheElitesJumpShip their secret bunker retreat]].
* ProperlyParanoid: He never takes his mask off, almost as if it's a memento to his days as a former-human scientist, even though he's essentially immortal and immune to disease. [[WordOfGod In actuality, it's solely to suppress his newly amplified sense of smell after he had undergone]] [[EmergencyTransformation the transfur procedure]].
* QuarantineWithExtremePrejudice: Dr. K is willing to go to ''great lengths'' to prevent Colin from reintroducing the [[ThePlague Pale Virus]] to the outside world. [[WellIntentionedExtremist It's hard to argue against him]], given this pathogen ended modern civilization several years ago.
* RasputinianDeath: Slowly succumbing to the Pale virus, and being shot up pretty badly during the riots, he took the K mutagen to save himself. He woke three days later transformed and [[ImmuneToBullets the bullets fell out]] of his new body.
* SensoryOverload: As a latex beast his sense of smell has become ''so acute'' that he finds odours very off-putting. K is always seen wearing a gas mask to suppress aromas and scents.
* SinisterSurveillance: He watches Colin's every step from the moment the young man emerges out of his cryogenic capsule. It rapidly starts getting on the [[TheMillstone human's nerves]] as the doctor interrupts their progress.
* SoleSurvivor: Of the bioengineering science team working to stop the Pale Virus pandemic.
* SycophanticServant: Turns out Dr. K as the SoleSurvivor of the research team is having difficulty maintaining the entire tower complex all by himself. He hopes he can turn Colin into an obedient animal that'll obey his commands via 'transfurmation' and the [[NonStandardGameOver success of this]] varies depending on the method/mutagen used.
* TakeAThirdOption: Ultimately he's able to devise [[SavedByThePhlebotinum a better solution]] for all parties when Colin himself cannot decide to [[ButNowIMustGo leave]] or [[IChooseToStay stay in]] the tower.
* TheyCallHimSword: He has no NoNameGiven, all the machines refer to him as "Dr. K", but "K" is merely the name of the latex mutagen [[ProfessorGuineaPig he used upon himself]] to avert death from the Pale Virus infection.
* TranshumanTreachery: Subverted. He's not an escaping experiment that wants to absorb you, and is only antagonistic towards Colin, by attempting to [[FedToTheBeast feed him to the latex goo beasts]], because he's trying to serve TheNeedsOfTheMany beyond the tower complex.
* WasOnceAMan: Once a brilliant scientist he's now a latex wolf-like creature with light, dense, soft fur, the only vestiges he ever was human are his clothes and intact-intelligence.
* WellIntentionedExtremist: The Doctor is willing to do anything to keep the virus from being reintroduced to the world, and when he suspects Colin of being a possible carrier, he'll resort to [[QuarantineWithExtremePrejudice imprisonment]] or [[ItsTheOnlyWayToBeSure forceful transformation]] to keep him from leaving.
* WhatHappenedToTheMouse: It's not known what happens to him after the events of any of the ''Special Edition's'' Betrayal endings, as he breaks off all communication with the deuteragonists.
* WhiteWolvesAreSpecial: With his transfurred appearance and big ears he looks like a fennec fox. Confirmed by WordOfGod, that the scientist used a wolf-like latex batch to save himself. However, the doctor is not a NobleWolf for most of the game, antagonistic towards the deuteragonists.
* WorthyOpponent: He acknowledges Colin as such after his sniper attack fails.
* YouAreWhatYouHate: He's not pleased he had to transfur himself with his [[MutagenicGoo own mutagen]] in order to survive the Pale Virus, nevertheless since he doesn't carry the deadly virulent considers himself ''more human'' than the protagonist.
[[/folder]]
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