[[folder:Sector V]]

The main characters of the show, they are a division of a worldwide [[spoiler:actually galactic]] organization known as the KidsNextDoor. They are considered to be one of the best teams in the KND.
* [[BambooTechnology 24 Technology]]: What most of their equipment is made of.
* {{Badass}}
** BadassAdorable
** BadassCrew
** BadassNormal: By comparison with most of the villains anyway, as they rely mainly on the aforementioned BambooTechnology and their military training in combat.
* ColourCodedCharacters / [[FiveManBand Five-Kid Band]]: The team fits this to the letter.
** TheLeader: Numbuh One[=/=]Nigel - Red
** TheSmartGuy: Numbuh Two[=/=]Hoagie - Blue
** TheChick: Numbuh Three[=/=]Kuki - Green
** TheBigGuy: Numbuh Four[=/=]Wally - Orange
** TheLancer: Numbuh Five[=/=]Abby - Purple/Indigo
** SixthRanger: Numbuh Six [=/=] Bradley - Black and White/Monochrome
* FiveTokenBand: A British boy, an American boy, a Japanese girl, an Australian boy, and a [[TwoferTokenMinority French/African-American]] girl.
* FreeRangeChildren
* HiddenEyes: In their default appearances, 4 of them have their eyes covered. Numbuh 3 just has her eyes closed all the time.
* [[KidHero Kid Heroes]]
* NiceMeanAndInbetween: Numbuh 3 and Numbuh 2 (Nice), Numbuh 4 (Mean) and Numbuh 1 and Numbuh 5 (Inbetween)
* TemporarilyAVillain: Everyone except Numbuh 5 were transformed into Spank Happy Vampires by Count Spankulot in Operation: L.O.C.K.D.O.W.N.
* TrueCompanions
* [[TeenSuperspy Tween Super Spies]]
* TwoGirlsToATeam
* VillainProtagonist: In the early episodes. Later on they are more heroic.
* WackyParentSeriousChild: Played straight with Nigel, Wally, Abby, and their respective parents, inverted with Kuki and Hoagie's respective parents.
* [[YouAreNumberSix You Are Numbuh Six]]

[[folder:Numbuh 1]]
'''Numbuh One''' / '''Nigel Uno'''

-> ''"Kids Next Door, battle stations!"''

[[TheLeader The leader]] of Sector V, an overworking agent who loves every minute of his job. [[MeaningfulName He is widely considered one of the best of the best]]. However, his paranoia and stubbornness have gotten in the way of doing his job effectively at times. He is voiced by [[BenDiskin Benjamin Diskin]].

* AdorablyPrecociousChild: Tries too hard to not act his age.
* AgentMulder
* ArchEnemy: Has three: the Delightful Children from Down the Lane [[spoiler:(his adopted cousins)]], Chad Dickson (aka [[spoiler:Numbuh 274, the former Soopreme leader of the KND and Numbuh One's former mentor]]), and Father [[spoiler:(his EvilUncle)]].
* AuthorityEqualsAsskicking
* BaldOfAwesome
* BerserkButton: Messing with his teammates.
** Or when it comes to being snapped out of his Brainwashing (among many) being overcharged at a restaurant.
* [[spoiler:ButNowIMustGo: He leaves Earth in the GrandFinale to join the Galactic Kids Next Door.]]
* [[CaptainErsatz Captain Picard]]
* ClosetGeek
* CoolShades
* ConspiracyTheorist
* CrackDefeat: "Operation: E.L.E.C.T.I.O.N.S."
* DeadpanSnarker
* [[FourTemperamentEnsemble Five Temperament Ensemble]]: Melancholic (hardworking, stubborn, easily paranoid, and takes the Kids Next Door VERY seriously)
* HeroesWantRedheads: He dated Lizzie, a redhead.
* HeroicBSOD: Gets this after the Delightful Children turn him into an adult until Numbuh Five gives him a RousingSpeech to get him back.
* {{Hypocrite}}: He ''can'' play the Sousaphone, he just dosen't like listening to it.
* InformedFlaw: According to everyone else in the show, his butt is so huge it's the kind of badonkadonk spoken only in legend. The viewers see a photo of it in the end.
* InsultedAwake: Several times.
* {{Jetpack}}: Has Jet Boots, also uses one in "Operation: O.O.M.P.A.H."
* KissingUnderTheInfluence: In "Operation: L.I.Z.Z.I.E.".
* TheLeader: Of Sector V
* LovedINotHonorMore: Abides by this philosophy until "Operation G.I.R.L.F.R.I.E.N.D.", where he chooses protect Lizzie over a mission. Unfortunately, [[spoiler:Lizzie has already had enough and breaks up with him]].
* MarriedToTheJob
* MeaningfulName: Nigel ''Uno'' -- Uno is Spanish for "one".
* NobleMaleRoguishMale: The Noble Male to Numbuh Four's Roguish Male.
* NoodleIncident: The Delightful Children are responsible for him losing his hair. Exactly how we never learn.
* OfficerAndAGentleman
* OfficialCouple: With Lizzie, [[spoiler:though she breaks up with him near the end of the series in "Operation: G.I.R.L.F.R.I.E.N.D.", after realizing that [[MarriedToTheJob his loyalty to the KND will always come first]].]]
* OnlyChildSyndrome: Nigel is the only Sector V member who doesn't have any brothers or sisters.
* PaperThinDisguise: As Billy in ''The Grim Adventures of the KND''. Also, another episode says he fooled the Toiletnator with a T-shirt that said "I am not Numbuh 1".
* [[spoiler:PassingTheTorch: Before joining the Galactic Kids Next Door, he mades Numbuh 5 the new leader of Sector V and gives his shades to her.]]
* PlatonicLifePartners: With Numbuh Five.
* PlayfulOtter: Gets turned into one in "Operation: G.R.A.D.U.A.T.E.S.".
* PrematurelyBald: Thanks to the Delightful Children.
* ProperlyParanoid: While his theories are plausible in his world, they're so convoluted that it's easy to see where he's stretching it.
* PuppyLove: With Lizzie.
* RealMenWearPink: He likes Rainbow Monkeys (Though he may not know it) as shown in the credits of "Operation S.A.T.U.R.N." and is shown to wear Rainbow Monkey underwear as shown in "Operation B.U.T.T."
* RedIsHeroic
* RedOniBlueOni: The red to Numbuh Five's blue.
* SunglassesAtNight
* TeamDad
* WeUsedToBeFriends: His issue with Chad stems from this. Nigel had ''idolized'' him, and Chad's betrayal had stung him deeply.

[[folder:Numbuh 2]]
'''Numbuh Two''' / '''Hoagie P. Gilligan Jr.'''

->''"Come to Numbuh Two!"''

The team's [[TheSmartGuy technology expert]] who loves cracking bad jokes. As Sector V's technology officer, he designs many of the 24 technology the team uses In his off time he enjoys building and flying airplanes and solving mysteries at his school. Voiced by [[BenDiskin Benjamin Diskin]].

* AcePilot
* {{Acrofatic}}: [[DependingOnTheWriter Though there are a few episodes where his chubbiness works against him]]. He mostly proves surprisingly athletic, though that's justified in that he and his team have been militarily trained.
* AdorablyPrecociousChild: Of the {{Adorkable}} type.
* {{Adorkable}}
* AirplaneArms: Used this in the original pilot.
* BewareTheNiceOnes: While not to the same degree as Numbuh 3, he is still a NiceGuy that can make you regret causing trouble.
* BewareTheSillyOnes
* BigEater
* BigGuyLittleGuy: The big to Numbuh Four's little.
* BrainsAndBrawn: The Brains to Numbuh Four's Brawn.
* BunglingInventor
* BunnyEarsLawyer: Despite all his eccentricities, he's an awesome pilot and techie.
* CompressedVice: His chocolate sauce addiction.
* CrouchingMoronHiddenBadass
* DisappearedDad: Numbuh Two's dad, Hoagie P. Gilligan, Sr., hasn't been seen at all throughout the series.
* DoggedNiceGuy: To Cree.
* DorkKnight
* [[ExpressiveMask Expressive Flight Goggles]]
* ExtremeOmnivore
* FatComicRelief
* [[FourTemperamentEnsemble Five Temperament Ensemble]]: Phlegmatic (laid back, friendly, sensitive, and the least action-oriented of Sector V)
* GadgeteerGenius
* GeniusDitz
* GogglesDoNothing: Half and half, he works with high speed equipment so it would help with wind resistance. But generally just has them on most of the time for no reason either.
* GRatedDrug: Chocolate syrup in the past, he even went to Alcoholics Anonymous-style group therapy meetings for them. An original script revealed that it was originally cranberry sauce.
* [[spoiler: HappilyMarried: To Numbuh Five of all people as adults. True what they say about {{opposites attract}}ing, eh?]]
* [[ShesAllGrownUp He's All Grown Up]]: Teen!Hoagie is pretty cute (not to mention much thinner), and even manages to catch Cree's attention.
* ImprobablePilotingSkills
* LikeAnOldMarriedCouple: With Numbuh Three when they take care of Bradley.
* MeaningfulName: Hoagie P. Gilligan ''Jr.'', appropriately enough, a twofer reference. First, there's "Gilligan," a reference to the title character of ''GilligansIsland'', who was also second-in-command on the ''S.S. Minnow''. Then there's the "Jr.", often used at the end of a boy's name to signify that he's the second male in the family to have inherited his father's name (a seemingly throwaway detail that foreshadows the importance of his DisappearedDad, Hoagie P. Gilligan, Sr.)
* NiceHat
* OfficialCouple: [[spoiler:With Numbuh Five.]]
* OppositesAttract: [[spoiler:With Numbuh Five.]]
* PrecociousCrush: On Cree.
* PrivateDetective: His side job, in full-on, [[ConspicuousTrenchcoat trenchcoat]]-clad FilmNoir mode.
* PungeonMaster
* RedOniBlueOni: The blue to Numbuh Four's red.
* SaltAndPepper: Salt to Numbuh Five's Pepper.
* SeniorSleepCycle: As an adult.
* SensitiveGuyAndManlyMan: The Sensitive Guy to Numbuh 4's Manly Man.
* [[spoiler:SettleForSibling: He ends up marrying Numbuh Five, his PrecociousCrush's sister.]]
* ShipTease: If you didn't see the hints that [[spoiler: Numbuh 2 and Numbuh 5]] like each other ''before'' [[spoiler: they got married in the GrandFinale]], watch the series over again. You'll notice a ''lot'' of things that you missed the first time around.
* TheSmartGuy
* TurnInYourBadge: He was once on Safety Patrol, but [[NoodleIncident his reasons for leaving the force are unknown]].

[[folder:Numbuh 3]]
'''Numbuh Three''' / '''Kuki Sanban'''

->''"What do you think I am, an airhead or something?"''

The team's [[TheMedic medic]], and the [[TheChick most feminine of the kids]], a happy-go-lucky girl who loves Rainbow Monkeys. In battle, she specializes in diversionary tactics. She seems to have a lot of admirers, but her heart obviously belongs to a certain Aussie. Voiced by LaurenTom.

* ActionGirl
* {{Adorkable}}
* AscendedFangirl: [[spoiler:She becomes CEO of the Rainbow Monkeys Corporation when she grows up.]]
* AsianAirhead: Type Two.
* AttentionDeficitOohShiny
* BelligerentSexualTension: With Numbuh Four.
* BerserkButton: Do not insult the Rainbow Monkeys in front of her and don't even mess with her plushies either.
* BewareTheNiceOnes[=/=]BewareTheSillyOnes
* BilingualBonus
** Kuki's last name ("Sanban") is Japanese for "third one" ("san" means three and the Japanese suffix "-ban" is used when creating ordinal numbers). "Kuki" itself is Japanese for "air", reflecting her carefree and {{Cloudcuckoolander}} personality.
** Her father's name, Kani, is Japanese for "crab" referring to his HairTriggerTemper.
** Her sister Mushi is Japanese for "insect", referring at how she can be a pest some times.
** Her mother's name is Genki, who is more staid and well-behaved than what her name implies (see GenkiGirl).
* [[ChickMagnet Boy Magnet]]: Numbuh Four aside, she's caught the attention of several other boys.
* CainAndAbel: The Abel to Mushi's Cain.
* CheerfulChild
* TheChick
* {{Cloudcuckoolander}}
* CrouchingMoronHiddenBadass
* CuteAndPsycho: At her most frightening.
* CuteBruiser
* CutenessProximity
* DamselInDistress: A recurring plot with King Sandy.
* DemonHead: When she gets angry.
* TheDitz: She acts pretty mindless a lot of times, even when she's in battle.
** Occasionally switches to GeniusDitz, depending on the situation.
* DorkKnight
* EveryoneCanSeeIt: Her relationship with Numbuh Four.
* EyesAlwaysShut:
* FirstNameBasis: With Numbuh Four.
* [[FourTemperamentEnsemble Five Temperament Ensemble]]: Sanguine (ditzy, cheerful, easily distracted MoodSwinger)
* {{Flanderization}}: Her love for Rainbow Monkeys grew to ridiculous proportions as the series went on. So much so that it even saved the universe at one point.
* FriendToAllLivingThings
* GenkiGirl
* GirlishPigtails: When she was younger.
* GirlsLoveStuffedAnimals: Her room doesn't really have anything else.
* {{Goth}}: Temporarily becomes one in "Operation:C.A.R.M.E.L." after losing her cheerfulness.
* HandHidingSleeves: Of the "Cute" variety; she wears a green sweater with overly long sleeves. She's also an innocent, ditzy, and simple-minded girl.
* [[spoiler: HappilyMarried: To Numbuh Four in the future, not that anyone was surprised.]]
* HumongousMecha: H.I.P.P.Y.-H.O.P., a bunny mecha.
* IdiotHair
* IdiotHero
* ImprobableWeaponUser: Not in the show proper, but in the Creator/CartoonNetwork game ''Rainbow Monkey Rundown,'' she fights King Sandy's minions with a yo-yo.
** StuffBlowingUp: Via a Rainbow Monkey powerup, said yo-yo can also be upgraded to one that explodes on contact with enemies.
* JerkWithAHeartOfGold: Her future self shown in "Operation: I.N.T.E.R.V.I.E.W.S." is a very harsh and serious businesswoman, but [[spoiler:she is still sad because of Numbuh 1's departure]].
* {{Kawaiiko}}
* KissOfDeath: After she gets TheVirus in ''WesternAnimation/OperationZERO'', she infects Numbuh Four with a kiss.
* KindHeartedSimpleton / NiceGirl
* LikeAnOldMarriedCouple: With Numbuh Two when they take care of Bradley.
* LittleMissBadass
* LooseLips
* MamaBear: Do ''not'' mess with the hamsters or Bradley.
* MeaningfulName: Kuki ''Sanban'' -- "Sanban" is Japanese for "third"; Kuki is a misspelling of "kooky" (meaning crazy or off-kilter) and is also Japanese for "air", both of which refers to her ditzy, {{Cloudcuckoolander}} personality.
* TheMedic
* {{Meganekko}}: As an adult.
* MightyWhiteyAndMellowYellow: She's a Japanese-American {{Moe}} girl, Numbuh 4 is an Austrailian-American.
* MoodSwinger
* TheNoseKnows: She can track Rainbow Monkeys down with her nose.
* ObfuscatingStupidity: According to TheOtherWiki, she only acts airheaded and happy [[StepfordSmiler to keep from being depressed]].
* OcularGushers
* OfficialCouple: With Numbuh Four, so obvious a spoiler tag isn't even needed.
* OppositesAttract: With Numbuh Four.
* ThePollyanna
* PrimAndProperBun: As an adult.
* PuppyLove: With Numbuh Four.
* RidiculouslySuccessfulFutureSelf: The {{Cloudcuckoolander}} grows up to become [[spoiler:the CEO of the Rainbow Monkey Corporation]].
* RunningGag: Trying to use the Hippity Hop mecha in battle never ends well.
* [[spoiler:StepfordSmiler]]: [[spoiler:As revealed in the final episodes of the series.]]
* TeamMom: To any animals she comes across.
* TemporarilyAVillain: In H.O.T.S.T.U.F.F. where she becomes a pyrokinetic and turned her house into an active volcano as a side effect of turning up the thermostat.
* TenderTears
* TomboyAndGirlyGirl: Girly Girl to Numbuh Five's Tomboy.
* {{Tsundere}}: Type B (deredere), meaning she's very sweet and cute... unless someone (usually Numbuh Four) pisses her off.
* [[TurnOutLikeHisFather Turns Out Like Her Mother]]: While its live-action, her dress and mannerisms as an adult are the spitting image of her mother.
* UnstoppableRage: When she goes into Demon Mode.
* UptownGirl: It's pretty subtle but compared to Wally, Kuki clearly comes from the more financially affluent family of the two with having successful parents (or at least a mother, who is the Head of Accounting at work), and her family lives in a fairly large house with a nice interior while Wally and his family resides in a much smaller house located in a more rundown neighborhood that is next to some electricity pylons. It is noted however that they are not necessarily rich and poor respectively, but more along the lines of upper-middle class and lower-middle class.
* WeNeedADistraction: Specializes in this when not being TheMedic.
* WideEyedIdealist
* WillTheyOrWontThey: With Numbuh Four, a lot.
** [[spoiler: TheyDo: The DistantFinale reveals they get married as adults.]]

[[folder:Numbuh 4]]
'''Numbuh Four''' / '''Wallabee Beatles''' (Wally)

->''"Right, first I'll be cleaning your adult-lovin' prissy little clocks..."''

The team's [[TheBigGuy combat specialist]]. He's incredibly lacking in book smarts, but his combat prowess more than makes up for it. In his off time, he competes in adult disapproved sports. Voiced by Creator/DeeBradleyBaker.

* AfraidOfBlood: He faints at the mere sight of blood.
* AntiHero
* AwesomeAussie: At his best.
* BelligerentSexualTension: With Numbuh Three.
* BigBrotherInstinct: Towards his baby brother Joey.
* TheBigGuy: Despite being the shortest in the group.
* BigGuyLittleGuy: The little to Numbuh Two's big.
* BlindingBangs
* BloodKnight
* BoisterousBruiser
* BookDumb: And proudly so, though [[spoiler:the DistantFinale reveals that he's earned multiple doctorates as an adult]].
* BrainsAndBrawn: The Brawn to Numbuh Two's Brains.
* BrattyHalfPint: At his worst.
* BreakTheHaughty
* ButtMonkey
* CannotSpitItOut: His feelings for Numbuh Three.
* CrazyJealousGuy: He ''hates it'' when other guys show interest in Numbuh Three.
* CrouchingMoronHiddenBadass
* CryCute: At the end of "Operation: S.A.F.E.T.Y.", when he thought his baby brother got hurt.
* CuteBruiser: Even more so than Numbuh 3, as he also appears to have SuperStrength.
* DrillSergeantNasty: Any rare moment he gets to be a leader, he becomes this. One scene in Operation M.I.S.S.I.O.N shows Numbuh 4 training a group of villains for bowling like boot camp, complete with even wearing a soldier's helmet. He was also a military general in Operation W.H.I.T.E.H.O.U.S.E.
* DudeWheresMyRespect: Over and over again.
* DumbMuscle / DumbBlonde
* EveryoneCanSeeIt: His relationship with Numbuh Three.
* FirstNameBasis: With Numbuh Three.
* [[FourTemperamentEnsemble Five Temperament Ensemble]]: Choleric (short-tempered, aggressive, forceful, and wants to be the leader)
* FourIsDeath: As the aforementioned team's resident {{Blood Knight}}, he is the one who ends up in combat a lot. He tends to be the unluckiest member of the group, yet has his happy moments. In perspective, he is the only member of the KND to not suffer a {{Gender Bender}} (and manages to be the only male by the end of Operation F.U.T.U.R.E.) as well as [[spoiler:marrying the girl of his dreams.]]
* FutureBadass: In Operation: F.U.T.U.R.E.
* GoodIsNotNice: While a member of the KND, he can still be a bully befitting his age.
* GoshDarnItToHeck: His constant use of the word "Crud".
* GreenEyes
* HairTriggerTemper: Has a fuse [[IncrediblyLamePun as short as his height]].
* [[spoiler:HappilyMarried: To Numbuh Three in the future.]]
* HotForTeacher: He has a little crush on his teacher Mrs. Thompson.
* IdiotHero
* JerkWithAHeartOfGold
* LandDownUnder
* LeaderWannabe: He wants to be leader of Sector V and always tries to pounce on the opportunity when Nigel is absent for whatever reason.
* MeaningfulName: Wallabee ''Beatles'' -- four members of The Beatles [a.k.a "The Fab Four"]. Also, four is considered an unlucky number in Chinese culture and Wally is the unluckiest member of the group.
* MightyWhiteyAndMellowYellow: He's an Austrailian-American who has a crush on a Japanese-American girl.
* TheNapoleon
* NobleMaleRoguishMale: The Roguish Male to Numbuh One's Noble Male.
* OfficialCouple: With Numbuh Three.
* OppositesAttract: With Numbuh Three.
* PrecociousCrush: Towards Mrs. Thompson.
* PuppyLove: With Numbuh Three.
* RedOniBlueOni: The red to Numbuh Two's blue.
* RidiculouslySuccessfulFutureSelf: The BookDumb kid grows up to [[spoiler:get a medical degree from ''Harvard'' and marry the girl he allegedly doesn't like]].
* ScreamsLikeALittleGirl: It's not pointed out specifically, but it's hard to not notice.
* SensitiveGuyAndManlyMan: The Manly Man to Numbuh 2's Sensitive Guy.
* SetRightWhatOnceWentWrong: In Operation: F.U.T.U.R.E.
* SheIsNotMyGirlfriend: To Numbuh Three. [[spoiler: Until the DistantFinale, where they are married.]]
* SmallNameBigEgo: When it comes to his schoolwork.
* SuperDrowningSkills: Can't swim, at least before "Operation: P.O.O.L.".
* TestosteronePoisoning: Justified in that he is 10 years old.
* {{Tsundere}}: A male example of Type A, with heavy emphasis on the "tsun" part. Dere when with Numbuh 3's being sweet to him.
* WhyDidItHaveToBeSnakes: He's very afraid of water. Even after he learns how to swim, he still avoids doing it whenever possible.
* WillTheyOrWontThey: With Numbuh Three.
** [[spoiler: TheyDo: The DistantFinale reveals they get married as adults.]]
* TheWorfEffect: First to charge in, often the first to go down.
* WouldHitAGirl

[[folder:Numbuh 5]]
'''Numbuh Five''' / '''Abigail Lincoln''' (Abby)

->''"I like it when things are too easy."''

The team's [[TheLancer second-in-command]], she's the one that keeps a level head under all circumstances, even when everyone else loses it. In her spare time, she's a candy hunter, which brings her in conflict with her rival Heinrich and candy pirate Stickybeard. Voiced by Creator/CreeSummer.

* ActionGirl: Especially when up against Cree.
* AgentScully: Is usually skeptical toward Nigel's conspiracy theories and will often be wrong.
* {{Bifauxnen}}: Dressed up in a suit once for a dance.
* [[spoiler:BigGood: In "Operation: I.N.T.E.R.V.I.E.W.S.", it is stated that she became Supreme Leader of the Kids Next Door after Numbuh 362 stepped down from her position.]]
* BraidsOfAction
* BreakoutCharacter
* BringIt
* ButNotTooForeign: She's half-French, even though both of her parents are black. It's likely that one or both of her parents could have African and French ancestry (either in France or in an African country that was once under French rule and still has French influence after gaining its independence, like the Cote D'Ivoire [Ivory Coast]).
* CainAndAbel: The Abel to Cree's Cain.
* CoolBigSis: She has her moments, but especially "Operation: D.O.G.H.O.U.S.E.".
* DeadpanSnarker
* DopeSlap: Gives these to Numbuhs 2 and 4 (usually with her [[NiceHat hat]]) if the former makes bad puns or if the latter does something stupid like thinking having all adults (good and bad) wiped out being a good thing.
* EnforcedColdWar: With Cree; both of them have to keep up the act of two loving sisters at home while pointing lasers at each other beneath the dinner table.
* EyeObscuringHat
* FriendlyEnemy: To Stickybeard and Heinrich Von Marzipan, though the latter isn't very friendly to her.
* FriendToAllChildren: To all younger children anyway, being still a kid herself, but still has shown a few times to be good with giving comforting pep talk to the younger kids she meets.
* [[FourTemperamentEnsemble Five Temperament Ensemble]]: Leukine (calm, rational, level-headed, and more emotionally balanced than her teamates)
* [[LadyOfAdventure Girl of Adventure]]: When she's candy hunting.
* [[spoiler: HappilyMarried: To Numbuh Two in the future.]]
* HeroicSacrifice: In ''WesternAnimation/OperationZERO''
* HiddenDepths: OnlySaneMan + PositiveDiscrimination + MyGreatestFailure + MyGreatestSecondChance
* {{Jetpack}}: Uses one in "Operation: C.H.O.C.O.L.A.T.E." and "Operation: C.L.O.W.N.".
* TheLancer
* LittleMissBadass: One of the most action-prone girls in the show.
* LittleMissSnarker
* MeaningfulName: Abigail ''Lincoln'' -- has the same initials and last name as U.S. President Abraham Lincoln (A.L.), whose face is on the five dollar bill in American currency.
** A [[FridgeBrilliance fridge-brilliant]] one: Abraham Lincoln's face is also on the penny in U.S. currency. Pennies are worth one cent. Numbuh 5 was once Numbuh 1 of the Kids Next Door.
* MinidressOfPower
* MyGreatestFailure:
-->'''Numbuh Five:''' The last time Numbuh Five didn't help someone kidnapped by the Delightful Children, they did something she can't ''ever'' forgive!\\
'''Numbuh Four:''' What?! What did they do that was so bad?!\\
'''Numbuh One:''' ... [[WhamLine They made me bald.]]
* MyGreatestSecondChance: Seeing her DarkAndTroubledPast as an opportunity to save a student from the Delightful Children.
* MySignificanceSenseIsTingling:
-->'''Numbuh Five:''' Something just happened. It's as if million of gallons of ice cream just... disappeared.
* NoodleIncident: It's mentioned in passing in one episode that Numbuh Five was once leader of Sector V. She stepped down from the position after some incident, but we never find out. Other bits point that she couldn't take the stress of full on leadership. She [[spoiler: nearly has a panic attack when Nigel reinstates her as leader before he leaves for his galactic mission. He reassures her she always had what it took to lead the group. Considering she would later take over the role of commanding the entire K.N.D, he wasn't kidding.]]
* NotSoAboveItAll: During a mission, [[DumbMuscle Numbuh 4]] stops to take some candies. Later, she tries to do the same.
* OfficialCouple: [[spoiler:With Numbuh Two.]]
* OnlySaneEmployee: To Numbuh One.
* OnlySaneWoman
* OppositesAttract: [[spoiler:With Numbuh Two.]]
* PlatonicLifePartners: With Numbuh One.
* PositiveDiscrimination: The black girl is the coolest, the sanest, and quite often the smartest of the gang.
* PrecociousCrush: Numbuh 5 obviously has a crush on Maurice despite him being way older.
* TheQuietOne
* RedOniBlueOni: The blue to Numbuh One's red.
* SaltAndPepper: Pepper to Numbuh Two's Salt.
* [[SassyBlackWoman Sassy Black Girl]]
* ShipTease: If you didn't see the hints that [[spoiler: Numbuh 2 and Numbuh 5]] like each other ''before'' [[spoiler: they got married in the GrandFinale]], watch the series over again. You'll notice a ''lot'' of things that you missed the first time around.
* {{Shorttank}}
* TheSnarkKnight: Though is obviously nicer than most examples of this trope.
* SweetTooth: All the kids are, but only Numbuh Five would risk her life in search of legendary sweets. She even has a kinship with Stickybeard.
* TeamMom
* ThirdPersonPerson: Not always, but very, very often.
* TomboyAndGirlyGirl: Tomboy to Numbuh Three's Girly Girl but played with in that Kuki wears a sweater and sneakers while Abby usually goes around in a minidress, white Mary Janes, and earrings.
* TomboyishBaseballCap: Doubles as a MementoMacGuffin.
* TomboyWithAGirlyStreak
* TwoferTokenMinority: French and African.
* WiseBeyondHerYears

!Other KND Operatives

[[folder:Numbuh 6]]
'''Numbuh Six''' / '''Bradley'''

A skunk that Numbuhs Two and Three took under their wing since "Operation: C.A.M.P.". After foiling Chester's plan of making a work camp out of an actual kid's camp, he is inducted into the Kids Next Door as an honorary member. After getting critically injured by Cree, Numbuh Two upgrades him into half-skunk, half-robot R.O.B.O.-B.R.A.D.L.E.Y. in "Operation: H.O.S.P.I.T.A.L.". He is voiced by Creator/DeeBradleyBaker.

* BadassAdorable: ''Especially'' as Robo-Bradley.
* CoolPet
* {{Cyborg}}
* HappilyAdopted: By Numbuhs Two and Three.
* HonoraryTrueCompanion
* KillerRabbit
* NinjaPirateZombieRobot:
-->'''Hoagie:''' [[spoiler:Not just ''any'' skunk! I've transformed Numbuh Six into a half-skunk, half-Kids Next Door operative, half-butt-kicking machine known as... ''R.O.B.O.B.R.A.D.L.E.Y.!'']]
* PetBabyWildAnimal
* RidiculouslyCuteCritter
* SmellySkunk
* TeamPet
* YouAreNumberSix: Literally.

[[folder:Numbuh 60]]
'''Numbuh Sixty''' / '''Patton Drilovsky'''

->''"Numbuh Sixty reporting for duty!"''

The boy in charge of training new recruits at Kids Next Door Artic Base, he cuts no slack with new recruits. He is voiced by Matt Levin.

* DrillSergeantNasty
* LanternJawOfJustice: You can see on his picture that he has quite a cleft chin for a kid who's probably around 10.
* LargeHam: if the following quote is any indication:
** Numbuh 60: "To the MOOOOOOOON!"
* MeaningfulName: Patton refers to the famous WorldWarII general. The last name is obvious.
* WiseBeyondHisYears: Considering how someone his age can give military training to other kids as well as how stern and mature he is most of the time.

[[folder:Numbuh [=65.3=] ]]
'''Numbuh Sixty Five Point Three''' / '''Herbie'''

->''"Sir, I needed those official orders signed seventy two point zero berger seconds ago"''

A Kids Next Door desk operative who frequently delivers mission specs to Sector V. He works on the Moon Base. Voiced by Creator/DeeBradleyBaker.

* {{Megane}}
* MissionControl
* MisterExposition
* ObstructiveBureaucrat

[[folder:Numbuh [=74.239=] ]]
'''Numbuh Seventy Four Point Two Three Nine'''

->"''If you honor what your friends are fighting for, you'll make that sacrifice."''

A high-ranking Kids Next Door scientist. His technology is what keeps the KND running. Voiced by Creator/DaveWittenberg.

* MadScientist
* [[spoiler:TheManBehindTheMan]]: [[spoiler:Part of the "splinter cell".]]
* [[spoiler:TeleportersAndTransporters]]
* TVGenius

[[folder:Numbuh 86]]
'''Numbuh Eighty Six''' / '''Fanny Fulbright'''

->''"Of all the stupid things in the stupid world of stupid people acting stupid, you boys are the stupidliest! It's like you're trying to win a stupid contest but you're too stupid to take a stupidity test!"''

The former Head of Decommissioning and current Global Tactics Officer. She's a shrill girl with a particular intolerance for the male sex. But due to her behavior, she has next to no friends. Voiced by JenniferHale.

* ActionGirl
* BelligerentSexualTension: With Numbuh Ninteenth Century.
* BerserkButton: Saying anything anti-feminist around her is a big No-No.
** Also don't ever call her "Toots", as Numbuh 2 learned the hard way in "Operation: P.I.N.K.-E.Y.E."
* BreakTheHaughty
* CoolHelmet
** BucketHelmet
* DaddysGirl
* DaddysLittleVillain: Inverted. She's Mr. Boss' (who leads the bad guys) daughter, but while she's extremely unpleasant and feared by everyone, she's still one of the good guys' leaders.
* DoesNotLikeMen:
* EmbarrassingFirstName: Fanny
* FieryRedhead: Bordering on EvilRedhead.
* GettingCrapPastTheRadar / StealthPun: During "Operation: G.R.A.D.U.A.T.E.S." she was turned into a dog, resulting in a muttering of "Well that figures..." [[spoiler:-- because she's a [[{{Jerkass}} bitch]], that's why]].
** Her name in the UK is a bit obscene too (see MeaningfulName below)
* GirlsLoveStuffedAnimals: As much as Numbuh Three.
* GoodIsNotNice
* HiddenHeartOfGold: She keeps it ''very'' well hidden.
* {{Jerkass}}: Later went from StrawFeminist to a just plain jerk to everyone.
* LittleMissBadass
* MeaningfulName:
** Numbuh in this case. When you look at her rank: "to eighty-six" means to eliminate/kick out or (for restaurant cooks) to take something off the menu.
** Her first name is meaningful in the UK and Ireland where she is from. In the UK, "fanny" is a vulgar slang term for the female genitalia on par with the word "cunt" . "Cunt," in both UK and US slang, is also used to mean someone who is unpleasant [[note]](it's stronger than "bitch" and is probably one of the few curse words out there that is still considered shocking and will never be heard uncensored in the media. In fact, it's on GeorgeCarlin's list of the seven words you can't say on TV)[[/note]], so combining that with Fanny's personality, and you have a MeaningfulName that [[GettingCrapPastTheRadar somehow got past the censors -- at least the ones in the UK]] [[note]](in American English, "fanny" is one of many slang terms for the human buttocks and isn't considered obscene at all. Funny and a tad improper -- yes, but not so obscene that it's unmentionable)[[/note]].
* TheMedic: A flashback to Numbuh Five's second Mission shows 86 wearing hat with a cross and checking on the injured. How she went from a medic to head of decommissioning is not explained.
* MoralityPet: To Mr. Boss.
* NeverMyFault: Her introduction episode, in which she never takes responsibility for her own blunders that wound up hampering Sector V's efforts for the mission. Thank goodness [[LaserGuidedKarma karma kicked in]] when the spy she thought she captured turned out to be an undercover agent (Number 362 in fact), whose mission was ruined by 86; she gets harshly chewed out for it. (For added irony, throughout most of the episode she was putting down the boys in the group for the most minor screw ups. End of the episode saw a ''girl'' doing this to her.)
* NoIndoorVoice: She yells quite often.
* NoodleIncident: According to a canon comic, whatever made her hate boys happened after she became an operative.
* {{Oireland}}
* PeekABangs: Sometimes.
* RedheadInGreen
* StrawFeminist: Later became less of this and more flat-out unfriendly to everyone.
* TomboyWithAGirlyStreak
* TooDumbToLive: She's really dedicated to her job, so much so that it blinds her to the most obvious points of logic. Such as in Operation E.N.D., when she is sent to capture and decommission Sector V based on the fact the computer says they're turning 13. Numbuh One points out they're in the same age group, ''they even went to kindergarten together''. But nope, if the databanks says they're teens, it ''must'' be true! No point in questioning it.
* {{Tsundere}}: A G-rated [[Anime/NeonGenesisEvangelion Asuka]], really.
* YouthfulFreckles

[[folder:Numbuh 362]]
'''Numbuh Three Sixty Two''' / '''Rachel T. [=McKenzie=]'''

->''"As Kids Next Door Soopreme Leader, I hearby order you to... go long!"''

Originally the top spy in the KND, she is now its current Soopreme Leader. Due to her busy and demanding job, she's often stressed, but at heart she stands stubbornly for the rights of kids everywhere, and if the situation arises she can be fun-loving too. Has grown to form a close friendship with Nigel Uno. Voiced by Creator/RachaelMacFarlane.

* ActionGirl
* AdamWesting: Her real name is Rachel [=MacKenzie=].
* AffectionateNickname: She tends to call Numbuh 1 "Soldier" a lot.
* AuthorityEqualsAsskicking: "Operation: I.T.", ''WesternAnimation/OperationZERO''
* BigGood: Her "Soopreme Leader" status really means something.
* BrownEyes: Her eyes sometimes appear brown.
* TheChainsOfCommanding: What kick-starts "Operation: I.T.".
* CoolHelmet
** BucketHelmet
* [[DoggedNiceGuy Dogged Nice Girl]]: Implied to be this to Numbuh 1.
* IdiotBall
** "The Grim Adventures of the KND" for RuleOfFunny.
** ''WesternAnimation/OperationZERO'' too, when the KND museum was under attack. Sector V was the closest. She ordered them to come back to the base which was also under attack but Nigel refuses till the museum was safe. Once Sector V did that as well as save the base single-handily, she chews out Nigel for disobeying orders. She does apologize later though once Grandfather is defeated, admitting if she had listened to him before the whole mess would've never happened.
* IJustWantToBeNormal: In "Operation: I.T.". To be fair, in her world being normal means spending all day doing whatever you want in a giant treehouse and going on exciting missions.
* LittleMissBadass
* MeaningfulName: She's two numbers off from 360, a full circle. As in the KND revolves completely around her.
* MundaneMadeAwesome: Defeats Father by eating through a wall of broccoli. Though to be fair, broccoli does seem to be some kind of universal kryptonite in the show.
* NiceHat
* NumberTwo: To Chad (Up until "Operation: E.N.D.")
* ReasonableAuthorityFigure
* ShipTease: With Numbuh One in "Operation: I.T.".
** And even more in "Operation: G.I.R.L.F.R.I.E.N.D.".
* SimpleStaff: A yield sign with a boxing glove at the opposite end in ''Operation: Z.E.R.O.''
* TeamMom
* TookALevelInBadass: While she was by no means ''un''badass before, in Operation: I.T. she's a little out of practice in hand-to-hand combat. Then in Operation: Z.E.R.O....
-->'''Numbuh 362:''' [[PreAssKickingOneLiner I'm going to throw Numbuh 60 a retirement party.]]
* WiseBeyondHerYears


[[folder:Father / [[spoiler: Benedict Uno]]]]
'''Father''' [[spoiler:/ '''Benedict Uno''']]
->''"Bravo, Mr. Uno. You managed to skillfully outwit a bunch of children. The question is, do you have what it takes to play with the big boys?"''

The mysterious head villain, Father is a man who wears a suit of shadows and is skilled in very dark powers. He schemes to enslave all children and turn them into his twisted version of "delightful". But despite his dark and malicious appearance, sometimes all he wants to do is curl up in a bathrobe with some Rocky Road. He is voiced by Creator/MauriceLaMarche.

* AchillesHeel: He can be rendered helpless by large amounts of water or cold substances, like ice cream. Strangely, he eats it occasionally, especially when depressed.
* {{Adorkable}}: [[spoiler:His child self can qualify as this. As for his adult version, it depends]].
* AffablyEvil
* ArchEnemy: To the Kids Next Door in general and Numbuh One in particular.
* AwesomeMcCoolname: [[spoiler:You've gotta admit, Benedict Uno has a nice ring to it.]]
* {{Badass}}: Arguably even more badass than ''Grandfather''. ''WesternAnimation/OperationZERO'' implies that he's stronger than Grandfather, but that he lacks any real motivation or confidence because of his childhood.
* BigBad
* BreakTheHaughty
* BurningWithAnger: Not just WreathedInFlames, but they increase in intensity when angry.
* CainAndAbel: [[spoiler:The Cain to Numbuh Zero's Abel.]]
* CardCarryingVillain
* ChildHater
* ClothesMakeTheSuperman: Proabaly a power inherited from Grandfather (its never really explained) but the shadow look is a cover giving him his powers and intimidating nature. The one time its taken off, we see the real Father (and [[spoiler: he's surprisingly rather nerdy looking.]])
* {{Cloudcuckoolander}}: Kinda becomes this through VillainDecay.
* CowardlyLion: A villainous example. He is too afraid of Grandfather, which is why the latter has a disdain for him.
* DiabolicalMastermind
* DisproportionateRetribution: In the finale, he wants to kill Numbuh One for stealing his pipe.
* DistinguishedGentlemansPipe
* DoesNotLikeSpam: He hates broccoli. In fact, he claims that ''everyone'' hates it, and that the only reason that adults make kids eat it is so that ''they'' don't have to. In fact, [[spoiler: in "Operation: I.T.", Numbuh 362 was able to subdue him by threatening to forcefeed it to him.]]
* EnemyMine: With the KND in ''WesternAnimation/OperationZERO'' [[spoiler:He wimps out when he loses the motivation.]]
* EvilIsBurningHot: Is it ''ever''.
* EvilIsHammy: You can tell Creator/MauriceLaMarche is having way too much fun with this role.
* EvilPlan: One in each episode but the overarching is one to bring down the KND organization.
* [[spoiler:EvilUncle: To Nigel.]]
* [[spoiler:FreudianExcuse]]: [[spoiler:Grandfather makes him look like a saint and the reason he refused to help fight him wasn't out of evil but out of pure fear. Grandfather also liked his brother better than him and treated him like crap. We also see Father break down and curl up on the floor when threatened to be forcefed broccoli because Grandfather did it to him in such a way he was traumatized for life!]]
* GlowingEyesOfDoom
* HairTriggerTemper: Through {{Flanderization}}.
* HatesBeingTouched
* HoistByHisOwnPetard: Father's fire powers are this in certain episodes.
* HumanoidAbomination: Can in ways be seen as this.
* KnightOfCerebus: Before the decay set in, he was taken ''very'' seriously whenever he showed up.
* [[spoiler:LukeIAmYourFather]]: [[spoiler:In TheMovie he reveals he's Numbuh One's uncle.]]
* TheManBehindTheMan: In the earlier episodes, the Delightful Children were the main villains, though he was mentioned in the first episode. In "Operation: C.A.N.N.O.N." the Delightfuls mention a curfew alert stating that they had to leave their butt whupping on Sector V or else Father would be angry.
* {{Manchild}} / PsychopathicManchild: He really is no more mature than most of the Kids he battles.
* MeaningfulName: [[spoiler: His real name comes from real life figure Benedict Arnold who was best known as a traitor to the U.S during the Revolutionary War. As shown in the movie, when given the chance to fight against Grandfather alongside Numbuh Zero, B. Uno was too scared to do so and exits, not once but ''twice''.]]
* MoralMyopia: Has own experiences of child abuse from his father, yet is perfectly fine with bullying kids during his grown up years.
* NewPowersAsThePlotDemands: In various episodes he's displayed one-time powers like MindOverMatter (Operation: C.A.K.E.D.-F.I.V.E.) and MesACrowd. (Operation: I.T.)
* NoCelebritiesWereHarmed: His voice is a parody of Kirk Douglas, [[HeyItsThatVoice which LaMarche previously used]] on ''WesternAnimation/{{Animaniacs}}''.
* PlayingWithFire: Gets it from his dad.
* RealMenWearPink
* SinisterSilhouettes
* TheUnfavorite: Grandfather favored [[spoiler: Zero]] over him mostly because Father was too spineless to stand up for himself.
* VileVillainSaccharineShow: Before the decay set in.
* VillainsOutShopping
* WellDoneSonGuy: To his father, Grandfather.
* [[spoiler:WoobieDestroyerOfWorlds]]

[[folder:The Delightful Children from Down the Lane / [[spoiler: Sector Z]]]]
[[caption-width-right:350:Clockwise from top: David, Lenny, Ogie, Bruce, Ashley]]
'''The Delightful Children from Down the Lane''' [[spoiler:/ '''Sector Z''']]

->''"Hello Kids Next Door. Perhaps you would like to try kicking our posteriors now?"''

Father's eerie children, supposedly an adult's view of the "perfect" kids. They are educated, well-dressed and polite, but uncivilized in their burning hatred for the Kids Next Door. They always appear clustered together, move as one and speak [[VoiceOfTheLegion in perfect unison]]. They are voiced by [[BenDiskin Benjamin Diskin]], Creator/DeeBradleyBaker, and Creator/CreeSummer.

* AdorablyPrecociousChild: Bruce (Short blonde kid).
* [[spoiler:AndIMustScream: When they're briefly de-brainwashed, Sector Z make it very clear that [[FateWorseThanDeath they are aware of what has been done to them]].]]
* [[spoiler:{{Badass}}: There is a reason that Sector Z is legendary.]]
* BadassNormal: Unlike some KND villians, they technically have no superpowers.
* {{Bigger Bad}}s: Seriously does their danger rating of 10 ring any bells?
* BlindingBangs: David (Tall kid).
* BracesOfOrthodonticOverkill: Lenny (top right) has headgear underneath his football helmet.
* BrainwashedAndCrazy: [[spoiler:They're revealed to be Sector Z in ''WesternAnimation/OperationZERO'']]
* BrokenStreak: [[spoiler:In "Operation: S.I.X." they finally get their birthday cake]].
* CardCarryingVillain
* CerealViceReward: The "C.A.K.E.D." missions.
* ChronicVillainy: Literally. They're so brainwashed that any reversing is only temporary.
* TheCollectorOfTheStrange: Toenails.
* {{Creepy Child}}ren
* [[spoiler:DisneyVillainDeath]]: [[spoiler:In "Operation: I.N.T.E.R.V.I.E.W.S.".]]
* DoubleReverseQuadrupleAgent: Lenny (Bonus points for being a ''Triple'' Agent).
* {{The Dragon}}s[=/=]DragonInChief
* EnfantTerrible
* EnemyMine
** With the KND in ''WesternAnimation/OperationZERO''
** And to a lesser extent "Operation: Z.O.O.".
* EvenEvilHasStandards: They sell out Father in "Operation: I.T." because even they don't like broccoli.
* EvilCounterpart: To Sector V.
* EvilHasABadSenseOfHumor
* EyeGlasses: Ogie (Short Braded girl) has these.
* [[spoiler:FaceHeelTurn]]: [[spoiler:They were once KND operatives before being "delightfulized".]]
* TheFaceless / NeverBareHeaded: Lenny (top right). [[spoiler:He shows his face In "Operation: U.N.D.E.R.C.O.V.E.R.".]]
* [[spoiler:{{Fallen Hero}}es]]
* [[spoiler:FamousLastWords: As Sector Z in ''WesternAnimation/OperationZERO'': "Tell... the Kids Next Door... that we miss them!"]]
* FauxAffablyEvil
* {{Flanderization}}
* GirlishPigtails: Ogie
* HatesBeingTouched
* HiveMind[=/=]IAmLegion[=/=]SpeakInUnison[=/=]VoiceOfTheLegion: They talk and act as if they are just one person instead of five.
* HypocrisyNod: They never get tired of calling the KND Stupid or foolish, despite the fact that the reason their plans keep usually fail is because their own intellience can be compared to that of a box of hammers.
* {{Jerkass}}es: Despite their image as "perfect children", they're sadistic and cruel to everyone else of their own kind, particularly whenever it's their birthday where they never share their cake with other kids and ''flaunt it''.
* KidsAreCruel:
* LightIsNotGood
* MindControlEyes: Light Blue.
* NaughtyIsGood
* NonActionBigBad
* NoNameGiven: Both of the girls are unnamed.
* OneWingedAngel: In "The Grim Adventures of the KND", as the Delightful Reaper.
* ThePsychoRangers: They look eerily similar to sector V.
* [[spoiler: ResistTheBeast: When the [[FaceHeelTurn delightfulization]] begins to return in ''WesternAnimation/OperationZERO'' [[AlasPoorVillain They ultimately fail.]]]]
* SchoolUniformsAreTheNewBlack: Their wardrobe is mainly comprised of nothing but this.
* [[SharpDressedMan Sharp Dressed Children]]
* ShoutOut: They seem to based on the antagonists in one of the Co-Creator's 1996 ''KaBlam'' Sketch The Off-Beats known as The Populars.
** This is even lampshaded in "Operation R.E.P.O.R.T. When Numbuh 5 tells her story about getting the pizza, the Delightfuls look just like the Populars.
* {{Stepford Smiler}}s
* StrangeMindsThinkAlike
* StudentCouncilPresident: In "Operation: E.L.E.C.T.I.O.N.S.". Lampshaded in "U.N.D.E.R.C.O.V.E.R." by Lenny.
* StupidEvil: Most of their plans fail either because of their own incompetance or because of their dim view of the heroes' own intelligence. Two of the best examples of are "Operation: F.L.A.V.O.R." and "Operation: U.N.D.E.R.C.O.V.E.R.".
* TroublingUnchildlikeBehavior
* VocalEvolution: In latter seasons almost to the point of being AxeCrazy.
* VillainEpisode: "Operation: P.A.R.T.Y."
* VillainsOutShopping
* WickedCultured

[[folder:Chad Dickson]]
'''Chad Dickson''' / formerly '''Numbuh Two Seventy-Four'''

->''"There was no way I was going to turn over everything I ever built, everything I ever worked for, to a bunch of snot-nosed kids!"''

Former Soopreme Leader of the Kids Next Door idolized and loved by all, he turned evil the moment he turned thirteen. He then served as a high-ranking member of the Teen Ninjas, and lost all the respect he had to his name. Generally cocky and approving of himself, both before and after his betrayal. Voiced by Jason Harris.

* BecomingTheMask: Sort of. [[spoiler:He's faking treachery and is a secret teen operative for the KND... however, after many defeats, his hatred for Numbuh One becomes real and he tries to kill him in his final appearance in the show.]]
* BadassNormal
* BigBrotherMentor: Was this when he was still Numbuh 274.
* BlondGuysAreEvil
* CardCarryingVillain
* ChildHater
* EvilIsDumb: After he turns evil, he automatically loses competence. [[spoiler:This may be [[JustifiedTrope justified]] by his role as a mole. (Hey, that rhymes.)]]
* FaceHeelTurn
* FallenHero
* [[spoiler:FakeDefector]]: [[spoiler:Revealed in "Operation: T.R.E.A.T.Y.", though, as evidenced by his VillainousBreakdown, he genuinely does have a lot of negative qualities.]]
* [[spoiler:GoodAllAlong]]
* [[spoiler:GoodIsNotNice]]: [[spoiler:He was nice when he was Soopreme Commander. But when he showed he was a deep cover agent, his jealousy still made him act like a nasty tool.]]
* HoistByHisOwnPetard: During Nigel's training days, Chad showed him a move that left Nigel flat on his back. [[spoiler: In his final battle against Numbuh 1, Nigel uses the same move to beat him.]]
* {{Irony}}: [[spoiler: As Numbuh 1 states, he was the best of the KND and he could've just bowed out gracefully while still keeping his Mole status. Indeed, if he hadn't let his pride get the better of him, he would've left a great legacy behind. He was the one who trained Numbuh 1 after all, so the kids would've definitely looked up to him after his departure. Maurice had the common sense to realize this, and allowed himself to be "decommissioned" so the KND would at least know of his reason for going bad and not have a grudge against him. Chad, however, acted too rashly (trying to destroy the KND base and then fleeing), so he'll forever have a traitor status to his name despite working behind the scenes.]]
** It ''can'' be argued that [[spoiler: his false FaceHeelTurn was so the villains would be more convinced. After all, a legendary KND suddenly wants to go evil for no reason and they aren't supposed to be suspicious?]]
* ItsPersonal: The underlying resentment between Chad and Numbuh One over his betrayal led to a fight between the two in ''Operation: T.R.E.A.T.Y.'' By that point, it had become ''extremely'' personal.
* LamarckWasRight: His parents are Destructo Dad and Mega Mom, and he later becomes more of a recurring threat than they ever were.
** The only time they are only mentioned (as his parents) is during "Operation E.N.D." but they aren't mentioned by name. They attend many supervillain meetings, but their bond between Chad isn't mentioned again.
* PeekABangs
* {{Pride}}: He thinks he's still the best there is.
* TeensAreMonsters
* VillainousBreakdown: [[spoiler:In his last appearance, he gets so jealous of Nigel for being the best Kid Next Door on Earth that he tries to kill him.]]
** [[spoiler: Operation: E.N.D likewise had this as his plans to fix the damage backfire royally culimating with him ranting how hard it is to run an organization full of "brats".]]
* VillainousCrossdresser: In "Operation: S.L.U.M.B.E.R.".
** [[SuspiciouslySpecificDenial It's not a bra!]][[InsistentTerminology It's Battle Ready Armor!]]

[[folder:Cree Lincoln]]
'''Cree Lincoln''' / formerly '''Numbuh Eleven'''

Numbuh Five's older sister and former Kids Next Door operative, skilled, cool and determined. Her relationship with her sister is very strained, but deep down they really do love each other. She is a high ranking member of the Teen Ninjas and Father's apprentice. Voiced by Creator/CreeSummer.

* AdamWesting
* AloofBigSister: For most to the series to Numbuh Five.
* BadassNormal
* BareYourMidriff
* [[BigBrotherMentor Big Sister Mentor]] / CoolBigSis: When she was still in the KND. Now, while such moments are very rare, Cree has shown that she's not totally uncaring toward Abby.
* BrokenPedestal: To Numbuh Five, who admired her until her betrayal.
* CainAndAbel: The Cain to Numbuh Five's Abel.
* CardCarryingVillain
* ChildHater
* DarkActionGirl
* EnforcedColdWar
* EvenEvilHasLovedOnes: She won't admit it, but she still cares about Abby and wants her to join the teenagers.
* FaceHeelTurn
* FallenHero
* FemmeFatale
* InstantArmor
* LateToTheParty: Throughout most of season two, she seen trying to get the KND moonbase claiming "It's all part of the plan". By the time she does however, Chad (who had turned traitor) had already tried and failed in his bid to destroy it.
* MsFanservice
* PeekABangs
* ShipTease: With Maurice.
* TeensAreMonsters

[[folder:Mr. Boss]]
'''Mr. Boss'''

->''"So long, shrimp! I hope your friend likes Pluto!"''

CEO of a big company and additionally the "leader" of the villains, he tends to lead them on cooperative missions. He hates all children... except his own. Voiced by Creator/JeffBennett.

* CardCarryingVillain
* CatchPhrase: "Aww geez it's the Toiletnator!"
* ChildHater: He has one exception, his children... One of them being ''Numbuh 86''.
* ContinuityCavalcade: Due to his nature as a leader of villains, and due to the show's nature of strong continuity, he is most commonly seen with a good portion of the adult villains seen up to that point.
* CorruptCorporateExecutive
* BadBoss: Tried to send all of the daughters of his employees to Pluto just so he can make them work ''even more''.
* EveryoneCallsHimBarkeep: "Operation: D.A.D.D.Y." reveals his last name to be [[spoiler:Fulbright]], so his villain name only shows his position.
* {{Facepalm}}: Whenever he sees the Toiletnator.
* GoodSmokingEvilSmoking
* HoistByHisOwnPetard: The reason why Mr. Boss's plans always get screwed over by the Toiletnator? Because he refuses to let the Toiletnator participate in his plans, thinking that he'll screw up, so the Toiletnator "takes things on his own level".
* LukeIAmYourFather: He's Numbuh 86's father.
* MoralMyopia: He hates kids unless they happen to be his.
* PetTheDog: He does love his own children.
* YankTheDogsChain: After the reveal that [[spoiler:Fanny is his daughter]], he says he'll fix pancakes for his children. He offers Numbuh 1 and his son's (Mr. Boss's son) sector for pancakes in a nice tone, but then tells them to go to a diner. He even turns off the lights on him.

[[folder:Laura Limpin]]
'''Laura Limpin''' aka '''The Big Badolescent'''

An adorable young girl who, whenever angered, transforms into a monstrous teenager. Voiced by GreyDeLisle as Laura and Creator/DeeBradleyBaker as The Big Badlosecent.

* AmbiguouslyBrown
* BerserkButton: Don't ever get Laura angry in any circumstances.
* BewareTheNiceOnes
* BewareTheSillyOnes
* ChuckCunninghamSyndrome: Only appered in two episodes in season one and was not seen again until [[GrandFinale Operation: I.N.T.E.R.V.I.E.W.S.".]]
* EyeGlasses: Mild-Mannered Laura has these.
* GirlishPigtails
* GirlScoutsAreEvil: She's a member of the Skunky Scouts.
* HulkingOut
* HulkSpeak
* PowerEchoes: In the Swedish dub.
* SuperStrength
* TeensAreMonsters: Granted that her alter ego ''is'' one.
* [[YouWontLikeMeWhenImAngry You Won't Like Her When She's Angry]]

[[folder: Chester]]

A man who has been seen conducting various money-making operations at the expense of children. Voiced by TomKenny.

* {{Greed}}: His evil plans usually involve money
* MadScientist
** MadDoctor: Was this in the episode where Numbuh One had to get a shot, where he was causing children to turn into animals via his injections.

[[folder: Common Cold]]
'''Common Cold'''

An eternally ill villain who wishes to spread his cold to everyone else in the world. Voiced by TomKenny.

* MeaningfulName

[[folder:Count Spankulot]]
'''Count Spankulot'''

A vampire who spanks naughty children. Voiced by DaranNorris.

* AntiVillain: He only spanks children who deserve it.
* FriendlyNeighborhoodVampire: He tries to be this in "Operation: S.P.A.N.K.", but fails miserably.
* LaserGuidedKarma: Invoked. He inflicts physical punishment on children who commit wrongful acts, sometimes even [[GettingCrapPastTheRadar adults]].
* OurVampiresAreDifferent
* PointyEars
* PowerLimiter: The gloves he wears are to prevent him from turning the people he spanks into vampires.


->''"Kids Next Door, prepare to be flushed!"''

The show's most pathetic villain. He gets no respect from the Kids Next Door or his fellow villains. Voiced by Creator/DeeBradleyBaker.

* AffablyEvil
* AwesomeMcCoolname: This is about the only thing he gets right.
* ButtMonkey: [[DCComics Pre-Crisis]] [[ChewToy Doctor Light]] could kick his ass.
* CardCarryingVillain
* ChildHater
* CrouchingMoronHiddenBadass: He's show several signs of this through the series... Idiot though he may be, this does still apply.
** "Operation F.L.U.S.H." -- He takes out five other villains thinking they're KND operatives in disguise. Of course, the five villains in question had just successfully taken over the Sector V treehouse, and then (just as he thought how could things get any worse) Numbuhs 1-5 (The actual members of Sector V who have been all excused from school early) show up and kick his butt. He's even stupider than we thought.
* DudeWheresMyRespect
* FriendlyEnemy: He was friends with Numbuh Four for awhile ("Operation M.O.V.I.E."), and joined the announcers in the finale. Though, in the CM/HB example he referred to Numbuh Four (actually Nightbrace) as his arch-nemesis. Gets kinda weird when it's revealed in a canon comic that [[spoiler:he's Numbuh Four's uncle.]]
* [[GranolaGirl Granola Guy]]: Likes vegetables, hates meat.
* HarmlessVillain: He's called the ''Toiletnator'', for crying out loud!
* IneffectualSympatheticVillain: Very ineffectual, very sympathetic. Except when he is kind of effective.
* TheMillstone: To the villains. ''Oh, so much''.
* NotSoHarmlessVillain
** He comes up with a plan in "Operation: M.O.V.I.E.S." that impresses the other villains. Too bad Numbuh Four heard it first.
** He also managed to "flush" the entire Grand Canyon after the KND filled it with cereal and milk.
** In one episode, he manages to defeat the other villains single-handedly after he believes they're the KND in disguise.
* ToiletHumor: Played with. This is a kids' show, so it's used only in the most literal sense.
* VillainEpisode: "Operation: F.L.U.S.H."
* VillainsOutShopping
* WhatKindOfLamePowerIsHeartAnyway: His motif is questionable. It also seems he's got some psychic control over flushing.
** HeartIsAnAwesomePower: Invoked. See the entries on CrouchingMoronHiddenBadass and NotSoHarmlessVillain. It doesn't seem so much that his powers are useless, he's just normally too short-sighted to use them correctly.
* TheWorfEffect: Grandfather uses him to demonstrate how dangerous citi-zombies are by making him his first victim.


A spirited candy pirate who loots and plunders candy from neighborhood children. He respects Numbuh Five and seeks her as an apprentice. Voiced by MarkHamill.

* BadassBeard
* BadassNormal: Among few villains that don't have superpowers
* CaptainColorbeard: Or Adjective-beard.
* CardCarryingVillain
* DressedToPlunder: He wears an eyepatch, a black bicorner hat with a skull on it, a Blackbeard-style beard (with candy stuck in it), and a peg-leg and hook-hand both made from candy canes.
* EnemyMine: With Numbuh Five, against Black John Licorice.
* EternallyPearlyWhiteTeeth: Inverted. His teeth are incredibly rotten from all the candy.
* EvenEvilHasStandards: He refuses to allow the Great White Asparagus to eat Sector V. Though that was more of a TheOnlyOneAllowedToDefeatYou moment than anything else. Though over all, he does seem to have some degree of honor.
** He even told Numbuh 5 to not mention the incident to the other villains.
* FriendlyEnemy: With Numbuh Five (at least).
* HookHand: With a candy cane instead of a hook.
* {{Pirate}}
* SeriousBusiness: Candy stealing is his prime modus operandi. Get in the way of that, and you're good as dead. And also being told if he was "sugar-free".
** Being called "sugar-free" is SeriousBusiness to ''any'' candy pirate as he says this to Black John Licorice.
* TalkLikeAPirate: Of course, since he's an odd {{Expy}} of Blackbeard.
* VillainsOutShopping: He helped Numbuh Five in Operation Licorice and saved her and her team in Operation Afloat. You can say that he has a soft spot for her.
* WeCanRuleTogether: To Numbuh Five. It almost succeeded until she remembered her friends, but now it leads to below.
** WorthyOpponent: To Numbuh Five. She's the only person in the world who can beat him in a sugar swallowing contest (Black John Licorice might disagree). She's the only one to give him an affection nickname of, "Sticky Buns" in return.

[[folder:Mr. Wink and Mr. Fibb]]
'''Mr. [[spoiler:John]] Wink and Mr. [[spoiler:Timothy]] Fibb'''

A pair of villains who use robotic [[HumongousMecha Super Chairs]] to fight the KND. Mr. Wink is voiced by TomKenny and Mr. Fibb is voiced by Creator/DeeBradleyBaker.

* BlindingBangs: Mr. Wink
* {{Expy}}: They're repackaged versions of the assassins from ''Film/DiamondsAreForever.''
* [[spoiler:FreudianExcuse]]: According to Mr. Fibb in ''Operation: C.O.W.G.I.R.L.'', [[spoiler:he and Mr. Wink "grew up" because Mr. Fibb didn't get to go to the prom with Lasso Lass.]] This would also explain their hatred toward the KND - [[spoiler:the kids probably remind them of their younger selves in the Cowboy Kids Club.]]
* HumongousMecha: Expect any chairs they may be sitting in to be a Super Chair of some kind.
* MisterXAndMisterY: Naturally, considering their origin (see {{Expy}} above).
* StarterVillain
* ThoseTwoBadGuys
* VillainousBreakdown: In ''Operation: C.O.W.G.I.R.L.'', [[spoiler:when their FreudianExcuse is revealed]]. Another immediately follows when [[spoiler:it turns out Lasso Lass really ''did'' like Mr. Fibb, but he's so shy he runs away screaming at the thought of kissing her. A similar incident occurs between Mr. Wink and Clip-Clop]], and they never appear as major villains again.


[[folder:Gramma Stuffum]]
'''Gramma Stuffum'''

An old lady obsessed with force-feeding her disgusting food to children to fatten them up, believing that a child that is too fat to move can't get into trouble. Voiced by GreyDeLisle.

* CardCarryingVillain
* ChefOfIron
* LethalChef
* PrimAndProperBun
* TookALevelInBadass: Operation: F.O.O.D.F.I.T.E.


[[folder:Crazy Old Cat Lady]]
'''Crazy Old Cat Lady'''

An old woman who lives with thousands of black and white cats. Voiced by GreyDeLisle.

* CardCarryingVillain
* CrazyCatLady
* TheNoseKnows


'''Knightbrace / Mr. Jelly'''

A villain obsessed with dental and oral hygiene. Voiced by TomKenny.

* BracesOfOrthodonticOverkill
* CardCarryingVillain
* DepravedDentist

[[folder: Professor XXX-L]]
'''Professor XXX-L'''

An insane scientist whose main goal is to create the perfect snowcone. Voiced by Creator/FrankWelker.

* AntiVillain
* {{Irony}}: The biggest obstacle to his goal to perfect the snowcone is the fact that he suffers from [[BrainFreeze ice cream headaches]] very easily.
* MadScientist
* VillainyFreeVillain: He may be the least evil villain the KND have ever fought next to the Toilenator. Yes he did kidnap Numbuh One but it was for a good cause, though given how Ice Cream seems to be only legally given to adults in this world, odds are he may not have shared his perfect snowcone with the children of the world [[SeriousBusiness which in this world is a serious blow to kid-kind]].

[[folder:King Sandy]]
'''King Sandy'''

A boy who thinks he is a king and usually tries to force Numbuh 3 to marry him, but eventually chooses her sister Mushi instead. Voiced by Creator/JamesArnoldTaylor.

* AndNowYouMustMarryMe: He tries to force Numbuh Three to marry him twice.
* CardCarryingVillain
* DoesNotLikeShoes
* LikesOlderWomen: Until he meets Mushi.
* LoveAtFirstSight: Towards Numbuh 3 and Mushi.
* PuppyLove: With Mushi.
* ScarpiaUltimatum: In Operation K.A.S.T.L.E., he coerces Numbuh 3 to marry him by threatening to dump a bunch of Rainbow Monkeys into a vat of hot nacho cheese.
* UnholyMatrimony: With Mushi.

[[folder: The Interesting Twins from Beneath the Mountain]]
'''The Interesting Twins from Beneath the Mountain'''

A pair of Japanese twins, who work for Father. Voiced by TomKenny and TaraStrong.

* ButtMonkey: Where to begin... they get attacked by a dog, have their most destructive vehicle destroyed, get beaten up by the Japanese KND operatives, disguise themselves as a KND operative only to get attacked by Wink and Fibb, and the Crazy Old Cat Lady. Seriously, compared to these guys, Numbuh 4 is the luckiest kid in the world.
* CreepyTwins
* {{Eerie Pale Skinned Brunette}}s
* FinishingEachOthersSentences
* HalfIdenticalTwins
* [[MasterOfDisguise Masters of Disguise]]
* NoNameGiven: They refer to one another as "Brother" and "Sister" respectively

[[folder:Six-Gum Gang]]
'''Six-Gum Gang'''

A gang of cowboy-style robbers who work for the Delightful Children From Down The Lane. Voiced by JenniferHale (Runt and Dixie), TomKenny (Goof), BenDiskin (Wilbur) and Creator/DeeBradleyBaker (Lunk).

* {{Cowboy}}s
* {{Nice Hat}}s


[[folder:Heinrich Von Marzipan / [[spoiler:Henrietta Von Marzpan]]]]
'''Heinrich Von Marzipan'''/[[spoiler:'''Henrietta Von Marzpan''']]

->''"Ach, lipschen, I say so many things I do not mean. Like, ah, no more candy for me, or, who would like some of my lollipops!"''

A former friend of Numbuh Five and current candy-hunting rival. He greedily seeks forbidden candy regardless of the consequences. Voiced by Creator/DeeBradleyBaker[=/=]Creator/CandiMilo.

* ArchEnemy: To Numbuh Five.
* BroughtDownToNormal: Got turned into a chocolate monster that can turn anything he touches into chocolate. After Numbuh Five defeats him, the KND turns him back to normal.
* CardCarryingVillain
* [[spoiler:GenderBender: In sacrificing his beauty, he switched genders. He's actually a girl.]]
* {{Greed}}: Obsessed with getting candy and never sharing it, which usually leads to many of his downfalls.
* [[spoiler: HeelFaceTurn]]
* HighClassGlass
* {{Homage}}: To ''Franchise/IndianaJones'' Nazi villains.
* ILied: As his quote indicates.
* NeverMyFault: He does this a lot, such as in his first appearance where he blames Abby for tainting the candy with the taste of asparagus when she warned him before hand that being greedy will put that curse into effect. It's also [[spoiler: his grudge for the Guatemala Incident as after he sacrificed his beauty due to yet another curse. He once more blamed Abby for not stopping him from eating his caramels and supposedly leaving him stuck in that state. Turns out she was trying to find a way to break the curse.]]
* OneWingedAngel: In his first appearance after obtaining a jewel, he transforms into a monster with power of candy. Numbuh Five defeats him. After falling into a chocolate volcano, he returned as a powerful monster who can turn things into chocolate by touching it. He was cured by the KND.
* NoodleIncident: Throughout the series he remains angry at Numbuh Five for "Guatemala". His last appearance in Operation CARAMEL reveals that [[spoiler:he performed a ritual to get delicious caramel by sacrificing their best trait (in his case ''her'' beauty) and blamed Numbuh Five for allowing it to happen.]]
* RoaringRampageOfRevenge: When he returns after falling into a chocolate volcano, having been turned into a chocolate monster.
* [[spoiler:SamusIsAGirl]]
* SeriousBusiness: Like with Stickybeard, Candy is serious business.

'''Margie / Madame Margaret'''

The principal of St. Rita's Preparatory School, who attempts to turn all the boys on the planet into girls. Voiced by CandiMilo.

* BadassCape: Her future self.
* DoesNotLikeMen: Her hatred has a much more extent than to that of Numbuh 86.
* EyeGlasses: Her younger self, her adult self ([[spoiler:Which turns out to be a robotic suit]]), and her future self has these.
* MobileSuitHuman: Piloted by her younger self, in which the lower half is a walker, it's also hinted that she's paraplegic.
* PinkMeansFeminine[=/=]PurpleIsPowerful
* TomboyishPonytail


A school rival of Numbuh 5 and a Were-Poodle. Voiced by GreyDeLisle as Valerie and Creator/DeeBradleyBaker as a Were-Poodle.

* BlondesAreEvil
* WolfMan


Father [[spoiler:and Monty Uno[=/=]Numbuh Zero]]'s father and an EvilOverlord who once ruled the entire planet. He's by far the most dangerous enemy the KND have ever faced and makes Father look like a saint compared to him. Acted as the BigBad in TheMovie. Voiced by Neil Ross.

* AbusiveParent: He's ''why'' Father is the way he is.
* ArchnemesisDad: To [[spoiler:Numbuh 0]].
* BigBad: Of TheMovie.
* BiggerBad: Of the series as a whole.
* CardCarryingVillain: The first thing he says after being reawakened is to thank Father for "reawakening the pure evil" laying dormant within him.
* CurbStompBattle: It didn't take him a whole lot of effort reconquering the world, likely because his minions are borderline invincible.
* TheDarkTimes: His previous reign. After that, it's little surprise the KND are so fearful of adults.
* DystopiaJustifiesTheMeans: His intent is nothing less than a CrapsackWorld where kids, and the second time, anyone who had ''ever'' been a kid, toils endlessly to create tapioca pudding for his consumption. It's a ''lot'' worse than it sounds.
* EvilOverlord: Once ruled the world with an iron fist before Numbuh Zero betrayed and defeated him.
* EvilerThanThou: To literally every villain in the RoguesGallery once they find out his plan to turn everyone that's ever been a kid into Senior Citizombies includes them. Father outright states that Grandfather is eviler than him before reviving him, calling him "The World's Most UltimateEvil".
* {{Expy}}: He seems to be partially based on Aku from ''SamuraiJack'' -- a black, shadowy monster who stands a couple stories tall in his natural state, can manipulate fire, and his very awakening spells doom for the whole world.
* FisherKing: When he rules the world, he uses his RealityWarper abilities to convert it into an old-style CrapsackWorld complete with child labor and Industral Era-style factories making tapioca pudding for him to eat.
* GenreSavvy: Is smart enough to NOT underestimate HopeSpringsEternal and understands he hasn't really won until he's destroyed the Book of KND, which let Numbuh Zero defeat him the last time. He also doesn't go out to find it until nearly the entire world is under his control and the Kids Next Door are all but destroyed.
* HumanoidAbomination
* LargeHam: Is an even bigger ham than his son.
* LaserGuidedAmnesia: Literally; his memory was erased by Numbuh Zero using some kind of laser, reducing him to a harmless old man until he's "recommissioned" by Father. This is the only way to defeat him, as all other attempts failed.
* NighInvulnerability: His reaction to getting [[ColonyDrop crushed under the entire Kids Next Door Moonbase]] is to dust himself off and ask if they really thought that would work.
* NoOntologicalInertia: His defeat restores the world to normal.
* OhCrap: Seeing the moon base barreling down on top of him. True it didn't do anything to hurt him, but A for catching him off guard.
* PhysicalGod: He's the single strongest villain in the series and is capable of surviving a direct hit from a ColonyDrop without even a scratch. He can also 'age' the entire world at will.
* PlayingWithFire: Father gets it from him.
* RapidAging: His primary ability is to age everything he touches, though not only does he age them rapidly, he turns them into his 'Senor Citizombie' minions. All individuals he ages gain the ability to do it to others.
* RealityWarper: He's capable of changing the world as he sees fit, normally to a more "old time" look.
* SuperpoweredEvilSide: His human form is a harmless old man so long as his memories aren't restored.
* TrademarkFavoriteFood: Tapioca pudding, so much so that was one of the reasons he wanted to rule the earth.
* TransformationSequence: Unlike Father, who just grows his "shadow suit" back, Grandfather sucks in the shadows from everything in the room to form his after being reawakened in a much more elaborate fashion.
* UngratefulBastard: Not even reviving him wins [[spoiler:Father]] any affection; he flat-out tells him to leave after being revived.
* TheVirus
* VileVillainSaccharineShow: ''Oh good god, yes''.
* WalkingWasteland: His RapidAging affects everything in his path. He has to make physical contact with people, however.
* WellDoneSonGuy: Done to Father, apparently not even reawakening him from his slumber earns his respect.
* [[ZombieApocalypse Citizombie Apocalypse]]

!Other Characters

'''Elizabeth Devine''' (Lizzie)

Numbuh One's demanding girlfriend. While she's quite clingy, she ''does'' genuinely care for Nigel, but his work for the Kids Next Door strains their relationship. Voiced by GreyDeLisle.

* BadassNormal: Bonus points for not being a KND Operative.
* CharacterizationMarchesOn: In her first appearance, she brainwashed Nigel into being her obediant boyfriend and even tried to make him destroy to his friends. The KND fight back and Nigel is unbrainwashed, but the episode ends with Lizzie [[KarmaHoudini getting the date she wanted anyway]]. Later episodes more or less completely ignored her origin story, and considerably softened her character.
* ClingyJealousGirl
* DayInTheLimelight: "Operation: L.U.N.C.H." and "Operation: L.E.A.D.E.R.". The first half of "Operation: P.O.O.L." has her sharing the spotlight with Nigel.
* EasilyForgiven: Nigel and the rest of Sector V had no hard feelings over the little matter of her having originally tried to ''{{brainwash}}'' him. Though it's mostly Numbuh One and Numbuh Three. Numbuh Two and Four openly dislike her, dreading any contact with her at all. They just don't verbalize it much due to fearing her bad temper (at least Numbuh Two fears her temper). Numbuh Five is tolerant of her at best.
* EyeGlasses
* FatGirl
* FieryRedhead
* IWantMyBelovedToBeHappy: [[spoiler:She and Numbuh One eventually break up when she realizes the world needs him more than she does, and that his first loyalty will always be to the Kids Next Door.]]
* LethalChef
* LetsGetDangerous: When she's properly motivated (either by Numbuh One being in danger or her plans being interrupted one too many times), she's a mecha-commandeering force to be reckoned with.
* TheLoad: She's not an operative. Subverted when she proves to be capable of handling herself in certain situations such as "Operation: C.A.K.E.D.-T.W.O.", "Operation: P.O.O.L.", and "Operation: D.A.T.E."
* NoIndoorVoice:
* OfficialCouple: Her and Numbuh One. [[spoiler:They break up later, and ''she'' is the one who brought it up.]]
* OnlyKnownByTheirNickname
* PaletteSwap: She has the same physical appearence as one of the Delightful Children From Down The Lane (Which is lampshaded in "Operation: C.A.K.E.D.-T.W.O.").
* PuppyLove: With Numbuh One.
* {{Tsundere}}: Type A and ''hard'', sometimes dipping into {{yandere}}'ish tendencies in her more extreme moods.

[[folder:Tommy Gilligan]]
'''Tommy Gilligan''' (The Tommy)/ formerly '''Numbuh T'''

Numbuh Two's little brother, Tommy is an excitable child ready to fight adult tyranny. Unfortunately, circumstances effectively halted his KND career. He now fights solo as "The Tommy". Voiced by Creator/DeeBradleyBaker.

* BrokenStreak: In "Operation: C.A.K.E.D.-F.O.U.R." he breaks his family's Tube-A-Thon losing streak (Despite his brother coming in 2nd).
* TheCowl: Parodied. He tries to be but can't pull it off.
* ADayInTheLimelight: "Operation: D.U.C.K.Y.".
* DisappearedDad
* DudeWheresMyReward: In "Operation: G.R.A.D.U.A.T.E.S.".
* HatesBaths
* HeroicSacrifice: In "Operation: G.R.A.D.U.A.T.E.S.".
* HeroicWannabe
* HonoraryTrueCompanion: To sector V.
* IWorkAlone: After becoming "The Tommy".
* {{Keet}}: Ties in with his LargeHam status, as he is alot more hyper and enthusiastic than his brother
* LargeHam: Once he becomes "The Tommy", he becomes considerably hammier.
-->'''Numbuh Five:''' "I work ''alone!'' I ''am'' The Tommy!" He is ''definitely'' your brother, Numbuh Two.
* LowerDeckEpisode: "Operation: T.R.A.I.N.I.N.G.".
* NiceHat: As "The Tommy".
* SpellMyNameWithAThe: He calls himself ''The'' Tommy, though he's about the only one.
* TagalongKid
* YouAreNumberSix: Played with; He takes the title of Numbuh T during his brief tenure with the KND.

[[folder:Mushi Sanban]]
'''Mushi Sanban'''

Numbuh Three's little sister. Voiced by TaraStrong.

* CainAndAbel: The Cain to Numbuh Three's Abel.
* CreepyChild
* CuteAndPsycho
* EnfanteTerrible
* GirlishPigtails
* GroundedForever
* MadScientist: In "Operation: S.P.A.N.K.E.N.S.T.I.N.E"
* ObfuscatingStupidity
* PuppyLove: With King Sandy.
* UnholyMatrimony: With King Sandy.

[[folder:The Kid]]
'''The Kid'''

A pilot in shades, The Kid is a rival pilot of Numbuh Two, and Numbuh Four's rival for Numbuh Three's affections. Voiced by Creator/CarlosAlazraqui.

* AlwaysSomeoneBetter: To Numbuh Two.
* CoolShades
* NoNameGiven
* TheRival: To Numbuh Two.
* RomanticFalseLead: In the Numbuh Three/Numbuh Four pairing.
* YouKnowWhatYouDid: In "Operation: D.O.G.F.I.G.H.T.".

'''Maurice''' / formerly '''Numbuh Nine'''

A former K.N.D agent (Numbuh 9) who is decommissioned when he turned 13. [[spoiler: However it's revealed he's part of a secret sect of teenagers who are still loyal to the KND and doing undercover work to help them from behind the scenes.]] Voiced by Khary Payton.

* [[spoiler: FakeDefector]]
* [[spoiler: TheMole: He was never truly decommissioned and his typical teen attitude is all an act so he can spy on the teens for the K.N.D]]
* NiceGuy: Very popular with the K.N.D for his personality. His decommission is quite heartbreaking for the organization.
* ThePromise: [[spoiler: During his younger days two of his fellow operatives get hit with Chicken Pox despite the mission being a success. He vowed he was would track the source of the chicken pox used by the teenagers and destroy it. He never manages it during his tenure with the K.N.D but after being decommissioned and turning mole for the group. He does fulfill his promise.]]


[[folder:Monty Uno]]
'''Monty Uno''' [[spoiler:/ formerly '''Numbuh Zero''']]

Numbuh 1's father. Voiced by Creator/FrankWelker and Creator/DaveWittenberg as a kid.

* ActionDad
* BackForTheFinale: [[spoiler:Recommisioned as Numbuh Zero for the second time in Operation: I.N.T.E.R.V.I.E.W]].
* BigOlEyebrows
* BumblingDad
* CainAndAbel: [[spoiler:The Abel to Father's Cain.]]
* CoolShades: As [[spoiler:Numbuh 0]].
* CrouchingMoronHiddenBadass
* TheFaceless: Initially but his face was seen from the halfway point of "Operation: O.O.M.P.A.H." onwards.
* MoralityPet: Downplayed.
** [[spoiler: He seems to be this to Grandfather, as he does like him as his son and considers him the favorite... then tries to incinerate him when he turns on him without blinking an eye.]]
** [[spoiler: He liked Zero more for the fact he was willing to stand up to him and give Grandfather something for a challenge]].
* ParentalFavoritism: His brother says his father always favored him.
* ParentalObliviousness


[[folder: Leona]]
'''"Leaky" Leona'''

A girl at Gallagher Elementary School who years ago found an ancient underground school beneath the girls' bathroom containing the FountainOfYouth. Voiced by CandiMilo.

* FountainOfYouth
* NeverGrewUp
* ReallySevenHundredYearsOld
* [[spoiler:[[HeKnowsTooMuch They Know Too Much]]: After the Sector V saver her from The Delightful Children, she tries to kill them because they know about the FountainOfYouth.]]

[[folder:Mrs. Thompson]]
'''Mrs. Thompson'''

Numbuh 4 and Numbuh 5's homeroom teacher at Gallagher Elementary School. Voiced by JenniferHale.

* [[spoiler: CannotTellALie]]
* EvilTeacher
* HotTeacher
* [[spoiler: TheManBehindTheMan: The leader of the Were-Dogs.]]
* PrecociousCrush: Numbuh Four has a crush on her.
* [[spoiler:[[WolfMan Were-Dog]]: Due to a curse she gained after being given a cursed green necklace by her angry ex-husband.]]