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!!Max Guevara/X5-452 (Creator/JessicaAlba)

%%* ActionGirl
%%* BadassBiker
* CatGirl: Not in appearance, but she has some feline DNA, which gives her extraordinary strength, speed... and [[MateOrDie heat cycles]].
%%* ChildSoldiers
%%* ClassyCatBurglar
* CoolBigSis: Tries to be one to Joshua (despite being younger than him).
%%* TheChosenOne
%%* DeadpanSnarker
%%* ExtraordinarilyEmpoweredGirl
%%* HeroWithBadPublicity
* MeaningfulName - after guerilla leader Che Guevara
%%* MsFanservice
%%* ScannableMan
%%* SheFu
%%* SugarAndIcePersonality
%%* SuperSoldier
%%* TomboyishName
%%* TykeBomb
%%* WomanInBlack
%%* YouAreNumberSix

!!Logan Cale/Eyes Only (Michael Weatherly)

* TheAllegedCar: a Pontiac Aztek.
%%* GeniusCripple
%%* HeroWithBadPublicity
%%* HollywoodHacking
%%* IntrepidReporter
* KnightInSourArmor - Lost some of his idealism over time. The prequel novel "Before the Dawn" shows that he was against killing bad guys and chewed Max's brother Seth out for doing so, but by the time of the series he's over it. Blaming himself for getting Seth killed, which he hides from Max until "After the Dark", may have something to do with it.
%%* KnowledgeBroker
* NiceGuy: Most of the time.
* ObfuscatingDisability - After his walking problem is solved by an exoskeleton
%%* PermaStubble
%%* PhraseCatcher
* SecretIdentity - Reporter Logan Cale vs Eyes Only.
%%* StoicSpectacles
%%* VoiceOfTheResistance

!!Original Cindy/Cynthia [=McEachin=] (Valerie Rae Miller)

* DopeSlap - called upon occasionally to give these to Max; see "Heat" for a particularly good example (Max: "Thanks. I needed that").
* MeaningfulRename - to Original Cindy, shedding her timid childhood persona
%%* SassyBlackWoman
* ShrinkingViolet - her original personality.
%%* ThirdPersonPerson
* TwoferTokenMinority - African American and lesbian
%%* UnfazedEveryman

!! Normal/Reagan Ronald (J.C. [=MacKenzie=])

%%* DeadpanSnarker
%%* {{Jerkass}}
* NerdGlasses - partial example, as he wears glasses and has a less-than heroic personality.

!!Kendra Maibaum (Jennifer Blanc)

%%* ChuckCunninghamSyndrome

!!Donald Lydecker (John Savage)

* TheAlcoholic - hasn't had a drink for 10 years when the show starts, but that doesn't last the season.
* AbusiveParent - closest thing the X5s had to a parent.
%%* BigBad - in Season One
* ColonelBadass - although following the ConservationOfNinjutsu, his badassery goes up exponentially when he's by himself.
* CoupDeGrace - delivers several.
%%* {{Determinator}}
* EnemyMine - and he uses the associated saying
* EstablishingCharacterMoment: Lydecker establishes himself as both a {{determinator}} and a complete [[{{Jerkass}} dick]] when he goes to an Alcoholics Anonymous meeting for the sole purpose of telling them how weak they are. You see, when ''he'' gave up drinking, he did it cold turkey under his own willpower. He didn't whine about how he had a disease and he needed help. The irony when he later falls OffTheWagon is delicious.
%%* GlassesPull
* HeartbrokenBadass - after his wife's pre-series death.
* LukeIAmYourFather - discussed and lampshaded. He isn't related to Max, but did include some of his dead wife's DNA in her.
* MercyKill - at the end of season one, he's about to kill Max and then himself. She convinces him otherwise with a boot to the head.
%%* NeverFoundTheBody
%%* OffTheWagon
%%* OffhandBackhand
* PapaWolf - He gets ''extremely'' upset when "his kids" are endangered.
%%* StoicSpectacles
%%* WellIntentionedExtremist

!!Alec [=McDowell=]/X5-494 (Creator/JensenAckles)

%%* BackupTwin
%%* DeadpanSnarker
%%* HandsomeLech
%%* HeelFaceTurn
%%* JerkWithAHeartOfGold
* LovableRogue - called one outright by Logan; starting as a LovableTraitor
* MeaningfulName - derived from "smart alec", actor Malcolm Mc[=McDowell=], and Malcolm's ''Film/AClockworkOrange'' character Alex
%%* MrFanservice
%%* PrettyBoy
%%* ScannableMan
%%* SuperSoldier
%%* TykeBomb
%%* YouAreNumberSix

!!!494 provides examples of the following further tropes while posing as Simon Lehane:

%%* BecomingTheMask
%%* ConvenientlyUnverifiableCoverStory
%%* DeadPersonImpersonation
%%* InLoveWithTheMark
%%* MyGodWhatHaveIDone
%%* SharpDressedMan
%%* StoicSpectacles
%%* TeacherStudentRomance

!!Joshua (Creator/KevinDurand)

%%* {{Adorkable}}
%%* BeastMan
* BeastAndBeauty - the Beast to Max's Beauty.
** And Annie's Beauty.
* BewareTheNiceOnes: He's pretty damn scary when he gets his hands on [[spoiler: Ames White]].
%%* CuteLittleFangs
* {{Expy}} - is rather similar in appearance and mannerisms to Vincent from the ''Series/BeautyAndTheBeast'' TV series.
* GeniusBruiser: Can seem simple due to his lack of world experience, but has a high IQ.
%%* GentleGiant
%%* TheHeart
%%* HulkSpeak
* NiceGuy: One of the nicest in the series.
* ReclusiveArtist: [[invoked]] For obvious reasons, he sold his paintings to the gallery via Alec.
%%* ThirdPersonPerson

!!Asha Barlow (Ashley Scott)

* PairTheSpares - looked like she and Alec were going this way, until they didn't
%%* LaResistance
* RomanticFalseLead - served as a {{Foil}} for Max and Logan

!!Ames White (Martin Cummins)

%%* BigBad - in Season Two
* EvenEvilHasLovedOnes - played straight with his son, but subverted with his wife, whom he kills.
%%* FantasticRacism
%%* SmugSnake

!!Zack/X5-599 (William Gregory Lee)

* AndIMustScream - After [[spoiler: Manticore recaptures him, he's used as a organ donor, providing a heart to Max and liver and kidneys to others. While still alive.]]
%%* BigBrotherInstinct
* BrainwashedAndCrazy - in his last episode
%%* ChildSoldiers
* KnightTemplarBigBrother - unapologetically kills Vogelsang (the information broker Max hired, who was later squeezed down by Lydecker) to protect his siblings
%%* NeuroVault
%%* ScannableMan
%%* SuperSoldier
%%* TykeBomb
%%* YouAreNumberSix

!!Ben/X5-493 (Creator/JensenAckles)

%%* ChildSoldiers
%%* HuntingTheMostDangerousGame
%%* LetThemDieHappy
%%* MercyKilling
%%* PrettyBoy
%%* RoomFullOfCrazy
%%* ScannableMan
%%* SerialKiller
%%* TheStoryteller
%%* SuperSoldier
%%* TykeBomb
%%* UsedToBeASweetKid
%%* YouAreNumberSix

!!Elizabeth Renfro/Madame X (Creator/NanaVisitor)

%%* BlondesAreEvil
* DiscOneFinalBoss: In Season 2. Until Manticore is deactivated
* ExcessiveEvilEyeshadow: A live-action version!
%%* EvilerThanThou
* {{Expy}} - of the Intendant from ''Series/StarTrekDeepSpaceNine''
%%* HaveYouToldAnyOneElse
%%* ObviouslyEvil
* OlderThanTheyLook: According to Nana Visitor, Renfro used transgenic DNA to retard the aging process.
%%* SmugSnake
%%* TakingTheBullet