[[center: [- [[Characters/PhineasAndFerb Main Character Index]] | [[Characters/PhineasAndFerbMainCharacters Main Characters]] |'''Youth'''| [[Characters/PhineasAndFerbAdults Adults]] | [[Characters/PhineasAndFerbOthers Others]]]]-]

This is a CharacterSheet for the youth of ''WesternAnimation/PhineasAndFerb''.

[[folder:Isabella Garcia-Shapiro]]
[[caption-width-right:320:Evidently, she and [[WesternAnimation/HeyArnold Helga Pataki]] go to the same clothing boutique.]]
->''"Hi Phineas. What-cha doooin'?"''
-> Voiced by: [[VideoGame/KingdomHeartsThreeFiveEightDaysOverTwo Alyson]] [[Film/CampRock Stoner]]

A girl who lives across the way from Phineas and Ferb and is a good friend of theirs. Isabella is a multi-talented member of the [[ScoutOut Fireside Girls]] with [[MeritBadgesForEverything quite a number of accomplishment patches]] to her name. She has a not-so-secret crush on Phineas, and likes to pop in once an episode to ask Phineas "[[CatchPhrase What'cha doin'?]]" and offer to help.
* TheAce: She has an exceptionally versatile set of skills and is extremely bright and athletic. She uses these abilities to earn Fireside Girl patches - a girl scout group which presents challenges varying from extremely difficult to outright ridiculous. "Act Your Age" reveals that she becomes a resident assistant by the time she starts her first year of college and has joined numerous diverse student organizations.
* ActionGirl: Not shown that often, but comes out in spades when it does. She has defeated Mitch, trashed countless Norm Bots during the FinalBattle in TheMovie, and saved all of Danville from being trapped in the form of pharmacist zombies.
* AllJewsAreAshkenazi: Despite every indication that her family is Sephardi, her mom and grandma still talk in Yiddish.
* BadassAdorable: See {{Action Girl}} above. "Night of the Living Pharmacists" confirms that she knows judo, hapkido, ''and'' jiu-jitsu, though she can't use them against the titular pharmacists without becoming one of them.
** In "Meapless in Seattle", [[spoiler:her adorableness is ''weaponized'']].
* BeautyIsNeverTarnished: An odd variation: when she and the Fireside Girls are on their own, she gets ruffled and scuffed, but the instant she's with Phineas she's as neat as ever without a hair out of place.
* BeneathTheMask: She's not as innocent as she looks.
* BerserkButton:
** A mild case, but she tends to get annoyed whenever someone else says her catchphrase.
** Also, Phineas being oblivious to her feelings.
* BewareTheNiceOnes: Both one of the friendliest characters ''and'' one of the most likely to let you have it when she's angered.
* TheBigDamnKiss:
** With [[spoiler:Phineas]] in the movie. Then their memories are wiped.
** And the end of "Act Your Age". [[spoiler: This is the first time where he initiates the kiss, rather than the other way around.]]
* BirthdayEpisode: "Happy Birthday, Isabella".
* BitchInSheepsClothing: Played with, she is '''not''' a bitch in any way, but she often puts on a ridiculously ideal nice and sweet persona when around Phineas, when in reality she's a normal person with flaws and all. She [[CharacterDevelopment does this less and less as the series progresses]], growing more comfortable with being herself in front of Phineas in hopes that he'll like her for her.
* CannotSpitItOut: Her crush on Phineas has been a running gag from the start. EveryoneCanSeeIt, but she can't tell him how she feels. She eventually [[spoiler:musters up the courage to tell him in "Night of the Living Pharmacists... but being zombified removes that incident from both of their memories]]. Phineas only finds out for real when his other friends tell him much later on in "Act Your Age".
* CatchPhrase: "Whatcha doin'?"
* CharacterDevelopment: Isabella would often put on a ridiculouly nice attitude when around Phineas. Over time, she starts to be more of herself around him -- a NiceGirl with flaws.
* TheChick: The most prominent and sometimes the only female in the main group of kids, and is often the one to pep talk Phineas out of his {{Heroic BSOD}}s.
* ChildhoodFriendRomance: With Phineas. [[spoiler:It took him years, but he finally reciprocated her feelings.]]
* ChildProdigy: As Fireside Troop leader.
* ColorMotifs: Except in her Fireside uniform, Isabella is always seen in clothing that has purple in it.
* CoyGirlishFlirtPose: Likes to greet Phineas this way.
* CuteBruiser: Isabella may be adorable, but she is ''tough''.
* CutenessProximity: She can [[spoiler:inflict this on others when she makes the effort]].
* DisappearedDad: Her father is never seen, except in a few literally blink-and-you'll-miss-it cameos.
* DistantDuet: With Phineas in "Act Your Age".
* EstablishingCharacterMoment: She gets [[HeartSymbol hearts in her eyes]] in the first episode when she sees Phineas.
* ExpressiveAccessory: In "Brain Drain" her hair bow went droopy when she was sick.
* FootPopping: [[spoiler:When kissing Phineas in the movie.]]
%%* FourTemperamentEnsemble: Phlegmatic.
* FunnyAfro: The episode "Robot Rodeo" ends with Isabella's hair frizzy ''because of the humidity'' that resembles the "afro puffs" style. She makes also a [[http://www.youtube.com/watch?v=MV0imDALBHI musical number]] in funk-style about this.
* AGirlAndHerX: A Girl and Her Chihuahua. Pinky, the chihuahua, is her loving companion.
* GirlNextDoor: Literally to Phineas, she is the across-the-street neighbor.
* GirlyBruiser: She wears a pink jumper, has a fondness for unicorns, and she's beaten Buford at sports. Considering Fireside Girls can earn a patch for wrestling an alligator, she's probably done that too. She's saved her love interest Phineas from trouble about as much as he's saved her.
* GirlyGirlWithATomboyStreak: She's girly, romantic, loves unicorns and wears a pink dress. She's also expressed a fondness for gross things and her [[GreatBigBookOfEverything Fireside Girls' manual]] includes a lesson on car maintenance.
* GreatBigBookOfEverything: The Fireside Girls Manual.
* HairDecorations: Her pink hair bow.
* HeartSymbol: When she sees Phineas [[EstablishingCharacterMoment in the first episode]].
* HeroesWantRedheads: Has a massive crush on the redheaded Phineas.
* HeroicSacrifice: When she [[spoiler:sacrifices her memories of Perry as a secret agent so that Perry can remain Phineas and Ferb's pet]] in TheMovie.
* HeyThatsMyLine: Whenever someone else says her catchphrase to Phineas, she [[BerserkButton won't be too happy about it.]]
* HiccupHijinks: In "One Good Scare Ought To Do It!". She does end up enjoying her hiccups because they get Phineas' attention.
* ImagineSpot: Shown in "Isabella and the Temple of Sap" and "Bee Day". They tend to involve Phineas suddenly confessing his love to her. Apparently, this happens enough that she has a name for it and the Fireside Girls know about it.
* ImprobableWeaponUser: In "Brain Drain", Isabella uses her sash as a weapon in a fighting game featuring themselves to defeat Buford. She has also used a camera to vanish a boss in a video game, a unicorn-shaped kiddie ride to take out an ''entire group'' of Norm Bots, and [[spoiler:''her cuteness'' to defeat Mitch]].
* InformedAttractiveness: "Meapless in Seattle" suggests that [[spoiler:she is the cutest thing in ''the universe'', at least among the characters that we've seen]].
* InstantCostumeChange: Pulls this in “Night of The Living Pharmacists” when she yanks her belt upward to change into her Fireside uniform.
* IWantMyBelovedToBeHappy: In "Summer Belongs To You", during Phineas' breakdown, she sacrificed her chance to have a moment alone with him so she can get him motivated again.
* LaserGuidedAmnesia: [[spoiler: As a HeroicSacrifice at the end of TheMovie.]]
* TheLeader: Of the Fireside Girls Troop 46231.
* LetsGetDangerous: Already competent as is. When Phineas is in danger, the kids gloves come off.
* LiterallyLovingThyNeighbor: Has a huge crush on her neighbor Phineas.
* MagicSkirt: An example in "Isabella and the Temple of Sap" where Isabella's skirt only flutters so lightly in the wind.
* NeverBareheaded: Rarely do we ever see her bareheaded, her hairbow being her usual head accessory.
* NiceGirl: Isabella is one of the friendliest people in the series.
* NoBrows: Subverted. The "learn to draw" book based on the show states she doesn't have brows and is sensitive about it. Despite this, she is seen with them often, especially in the fourth season.
* ObliviousToLove: Ironically became this [[spoiler:to Phineas. He developed feelings for her in high school (by which point she had given up on him ever figuring out her feelings for him) and she was unaware of this development until he flat out told her in "Act Your Age".]]
%%* OddFriendship: Sometimes with Candace.
* OffModel: The animators seem to have difficulty remembering if she should be wearing her Fireside Girl uniform in a scene or whether she's suppose to be taller than Phineas or the same height as him.
* OneOfTheBoys: She regularly hangs out with the boys even when not accompanied by the other Fireside Girls and has no problem with participating in any of their activities. In part, this is due to her desire to spend time with Phineas, but there is no question that she is good friends with the rest of the group as well.
* OOCIsSeriousBusiness: In "Night of the Living Pharmacists", she brushes Phineas aside despite him displaying great concern for her because she had discovered urgent information about the zombie pharmacists that could help the gang save Danville.
* PinkMeansFeminine: Her dress and hair bow.
* RelationshipUpgrade: [[spoiler:With Phineas, after high school.]]
* ScoutOut: Member of the Fireside Girls. She and her troop have earned many a badge in helping the boys; they have mentioned that they've collected more than fifty of the 'Help Thy Neighbor' patch because of it.
%%* ShipTease: Most often with Phineas.
* SiblingTriangle: "Quantum Boogaloo" reveals that she's going to marry one of the Flynn-Fletcher brothers. It will probably be Phineas, but Ferb [[ShipTease seems to hint]] that he's keeping his options open. "Act Your Age" shows [[spoiler:her eventually getting together with Phineas]].
* SingleTargetSexuality: Isabella never had a crush on anyone but Phineas. Except the Beak. Who turned out to be Phineas (and Ferb).
* SingleWomanSeeksGoodMan: Isabella has a massive crush on [[NiceGuy Phineas]].
* TheSmurfettePrinciple: The main girl of the kid cast, and usually the only girl when Candace and the Fireside Girls aren't involved.
* SuperOCD: The concept of ''not'' earning ''all'' the Fireside Girl patches is a horrifying prospect for her.
* ThrowTheDogABone: While Phineas remains oblivious to her feelings throughout their childhood, she does succeed in spending time with him alone in a couple of Season 4 episodes ("Happy Birthday, Isabella" and "It's No Picnic").
* {{Tsundere}}: Some episodes seem to indicate that she's a Type B.
* {{Tuckerization}}: Named after Dan Povenmire's daughter.
* TwoferTokenMinority: Hispanic and Jewish. Her family is part of the "Mexician-Jewish Cultural Festival".
* UnrequitedLoveSwitcheroo: "Act Your Age" reveals that Isabella gave up on Phineas when they started high school, thinking that he'd never figure it out. [[spoiler:He started developing feelings for her around the same time, though he never ''did'' figure it out -- he had to be flat out told by his friends after he said to them that he was fully convinced he was in the friend-zone. In the meanwhile, Isabella remained completely unaware throughout their high school years until he finally told her as she was leaving for college]].
* VocalDissonance: In "It's a Mud, Mud, Mud World", she is shown to be capable of speaking in a surprisingly deep voice.
* VocalEvolution: Her voice in later episodes tends to be noticeably higher pitched than in her debut.
* WillTheyOrWontThey: With Phineas, of course. [[spoiler: TheyDo.]]
* YankTheDogsChain: Anytime when it looks like Isabella is about to have a romantic moment with just Phineas, something happens at the last second to ruin that moment.

[[folder:Baljeet Tjinder]]
[[caption-width-right:320:You can tell he's a nerd because he is studying during summer vacation.]]
->''"I'm running out of underpants!"''
-> Voiced by: Maulik Pancholy

A shrimpy BollywoodNerd who's more than a little obsessed with order and studying. He's a friend of Phineas and Ferb who occasionally joins in on their daily activity, or even seeks out their advice. Occasionally, they also seek out his, usually when it comes to things like checking their math.
* AbsurdPhobia: His considers a failed math test to be the scariest thing known to man. He also fears contractions.
* AdorablyPrecociousChild: He's quite mature and serious about his schoolwork.
* {{Adorkable}}: Nerdy and cute as a button.
* AmbiguousDisorder: Extremely dependent on routines and clear direction, socially introverted, observant but somewhat oblivious and emotionally stunted, able to focus for long periods on repetitive behaviors, and almost child-prodigy level intelligent.
* AllThereInTheScript: His surname, which different sources had given as either Patel, Rai, or Raj. It was finally confirmed to be Tjinder on Swampy Marsh's [[https://twitter.com/mmonogram/status/269235804394631170 Twitter]] in 2012.
* AwesomenessByAnalysis: Once saved Buford from plummeting to his doom by doing a rapid-fire calculation of his fall trajectory.
%%* BadassAdorable: [[spoiler:Hulkjeet]].
* BadassBookworm: Usually averted; he's typically the most submissive and [[NonActionGuy least action-oriented]] of Phineas and Ferb's gang. Check out what he's capable of when not being [[OvershadowedByAwesome overshadowed]] by Phineas and Ferb's brilliance in "Bully Bromance Breakup" though...
* BerserkButton: Do ''not'' make Baljeet do schoolwork and not give him a grade afterwards.
* TheBGrade: A variant. Baljeet didn't take getting an "A-" so well.
* BigGuyLittleGuy: The little to Buford's big.
* BigOlEyebrows: Thick, square-shaped eyebrows.
* BollywoodNerd: Indian and nerdy.
%%* BringMyBrownPants: A RunningGag for him.
%%* BullyAndWimpPairing: With Buford.
* ButtMonkey: Not nearly as bad as Candace and Doofenshmirtz though.
* CampStraight: While there are episodes and moments where he is clearly interested in girls (Wendy and Isabella for example), other moments paint him as AmbiguouslyGay, like his unicorn game piece in "Skiddly Whiffers" and dressing up as a flower in "That's the Spirit".
* CharacterizationMarchesOn: Early, he was designed to just be simply a nerd who got bullied by Buford. But as the series progressed, he gained more of a [[DeadpanSnarker snarky personality]], talked back to Buford numerous times and seemed to be more equal with him.
* ChickMagnet: His childhood friend Mishti, Wendy Stinglehopper, and Ginger Hirano ([[spoiler:future girlfriend]]) all have crushes on him.
* ChildProdigy: While less mechanically skilled, he is just as intelligent as the title characters. In fact, they sometimes get him to check ''their'' math. [[spoiler: He becomes a full Professor by the time the others are graduating high school.]]
* CrouchingMoronHiddenBadass: When he gets out from under Buford's thumb in "Bully Bromance Breakup", he climbs a mountain completely on his own, by which I mean he even eschews any form of equipment.
** He takes out dozens of [[spoiler:Doof-2's Normbots using the Beak suit... by sissy slapping them.]]
** [[spoiler: Solidified in "Mission Marvel" when he temporarily gains the same powers as Hulk.]]
* DeadpanSnarker: Especially during the moments when he is aware of his status as a ButtMonkey.
** His alternate dimension counterpart shows shades of this, particularly in the spin-off games.
* TheDitherer: In "Primal Perry", but he gets over it by the episode's end.
* EstablishingCharacterMoment: His first appearance (the image above). He's shown studying during summer vacation, and then subsequently being pushed out of chair by Buford.
* EvenNerdsHaveStandards: Even he considers Irving to be a nerd.
%%* FourTemperamentEnsemble: Melancholic.
* FriendlyEnemy: With Buford. Think the normal "bully-and-nerd" dynamic [[HoYay/PhineasAndFerb turned into a borderline romantic relationship]].
* FriendOrIdolDecision: [[spoiler: When he gets out from under Buford's thumb, he gains some pretty extreme competence, to the point that he climbs a mountain and performs some impressive stunts with nothing but the clothes on his back. However, he realized that the achievement felt hollow without Buford, and patched things up with him at the end of the episode.]]
%%* FunnyForeigner
* HairstyleInertia: Keeps his same hairstyle into his adulthood.
* HulkingOut: In [[spoiler:"Mission Marvel"]].
* KavorkaMan: For a nerd, he's had quite some success with the ladies, even ''outside'' of "Ferb TV".
* {{Kidanova}}: He also attempted to hit on Isabella once.
* LaserGuidedAmnesia: [[spoiler: As a HeroicSacrifice at the end of TheMovie.]]
* LawfulStupid: He has a ''punk song'' dedicated to this. And it's awesome!
* NerdsLoveToughSchoolwork: He loves doing math problems and studies during summer vacation. In fact, he can't wait to return to school in the fall, much to the confusion of the other kids.
* NonActionGuy: He can design a blueprint, but is inept at even basic construction skills and is generally less physically inclined than his friends. That being said, he's far from helpless, being able to climb a mountain without prior preparation of any equipment and having helped defend Danville from the forces of [[WesternAnimation/PhineasAndFerbTheMovieAcrossThe2ndDimension Doofenshmirtz-2]] and [[WesternAnimation/PhineasAndFerbMissionMarvel Red Skull]].
* ObliviouslyEvil: "Cranius Maximus" has him attempt to move the Earth's atmosphere to the Moon so that telescopes would have a clearer view of the cosmos- ignoring the fact that no-one would survive to appreciate that.
* ObliviousToLove: Although it probably helps that Ginger doesn't get to show it as often. He does eventually get together with her by the time of "Act Your Age".
* OfficialCouple: With Ginger, as revealed in "Act Your Age".
* OnlySaneMan: When someone lampshades the logical or scientific inconsistencies that crop up in the show, it's likely to be him. Despite that, he goes along with all the wacky hijinks regardless.
* OvershadowedByAwesome: When you're TheSmartGuy in the group led by two geniuses who are already bright enough as is, there really isn't much for you to do. It is something of a trend that Phineas and Ferb go to Baljeet mostly for help with trivial matters such as to find out [[WhatTheHeckIsAnAglet what the tip of a shoelace is called]]. His intelligence occasionally proves useful in the planning stages, such as in "Undercover Carl". Unfortunately, planning stages are often skipped, shortened, or end before Baljeet shows up, making him seem less useful by comparison.
%%* PintsizedPowerhouse: As [[spoiler:Hulkjeet.]]
* ScheduleFanatic: Shown in "Bubble Boys".
%%* SensitiveGuyAndManlyMan: Sensitive guy to Buford's manly man.
* SesquipedalianLoquaciousness: [[ButtMonkey But it's not as cute when he does it.]]
* ShipTease: Let's see... he has frequent {{Ho Yay}} moments with Buford, has a [[VictoriousChildhoodFriend sort-of]] [[GirlOfTheWeek girlfriend from India, Mishti,]] [[UnderTheMistletoe kissed a girl named Wendy in the Christmas Special,]] and somehow managed to [[ObliviousToLove become the crush of Fireside Girl Ginger]]. [[MyFriendsAndZoidberg Oh]], and despite all that [[AllLoveIsUnrequited he's been implied to have a crush on Isabella.]] "Act Your Age" upgrades him and Ginger to OfficialCouple.
%% Male characters cannot be the Chick. Look at its page and it will say so. %%
* SkewedPriorities: Occasionally prone to this, as when his first concern when his project sends Candace to Mars is that he's going to lose the Science Fair.
* TheSmartGuy: While Phineas and Ferb are extremely intelligent themselves, Baljeet is the self-proclaimed nerd of the group. He gets to [[OvershadowedByAwesome show his stuff more often]] when the brothers are out of commission for whatever reason, but his sense of detail still makes him a valued member of the team.
* SpockSpeak: He fears contractions and rarely uses them.
%%* SuperStrength: As [[spoiler:Hulkjeet.]]
* TeenGenius: "Act Your Age" shows that by the time the others are getting ready for college, he has already become a professor.
* TemporarilyAVillain: In "Cranius Maximus" and "Primal Perry".
* TheDogBitesBack: In ''Primal Perry'', thanks to the ability to literally make choices without repercussions.
* ThoseTwoGuys: With Buford.
* TinySchoolboy: Shortest boy in his circle of friends like Phineas (They're the same height).
* TokenMinority: Indian.
* TookALevelInBadass:
** Not exactly badass, but he definitely becomes more confident and more willing to push back against Buford's bullying as the series goes on.
** In "Mission Marvel", he [[spoiler:temporarily gains Hulk powers.]]
* VitriolicBestBuds: With Buford. They even have a song about this.

[[folder:Buford Van Stomm]]
[[caption-width-right:336:He's surprisingly a NiceGuy as bullies go.]]
->''"'Wall of meat,' huh? I can do that."''
-> Voiced by: Bobby Gaylor

While introduced as the dim-witted, thuggish local bully, Buford has some surprising HiddenDepths, and he eventually becomes a member of Phineas and Ferb's circle of friends. He still exercises a slightly twisted sense of humor, and likes to hang out with Baljeet largely ([[VitriolicBestBuds but not entirely]]) so he has an easy target for bullying handy.
* AllDrummersAreAnimals: Whenever the gang forms a band for a musical number, he plays the drums.
* AmazonChaser: He expresses attraction to girls who act "tough" in some way (but, interestingly, never towards Isabella, despite her having such tendencies up to and including beating him at sports).
* AnimalMotifs: He dresses up in a bear suit from time to time. He is also associated with fish, considering his pet is a goldfish and he [[ShamuFu used a fish as a weapon]] in "Mission Marvel".
* AnimalThemedSuperbeing: He calls himself Bear Boy in "Mission Marvel".
* BadassNormal: [[spoiler: In "Mission Marvel", Phineas and Ferb don the Beak suit to fight the villains while Baljeet gains the powers of Hulk from an earlier mishap. Even Perry gets an upgrade by using a superhero suit that allows him to fly. Buford? He jumps into the battle with nothing but a dead fish.]] Even before that, he was shown to take down a giant squid with just one hit.
* BarbaricBully: As mentioned above, he has HiddenDepths, but otherwise fits the template to a T.
* BerserkButton: Don't mess with his goldfish.
** Call Buford a wimp/sensitive, and you will receive a painful wet willy.
* BigEater: Buford is often seen eating or craving food.
* TheBigGuy: Though he's not dumb as he seems, he still prefers to solve most problems by physical force.
* BigGuyLittleGuy: The big to Baljeet's little.
* BookDumb: He doesn't like math problems.
* BrooklynRage: Has a Brooklyn accent, and is a jerk.
* BruiserWithASoftCenter: Not that you'll get him to admit it, but he does care about his friends and has [[RealMenWearPink expressed interest]] in stereotypically feminine activities like quilting.
* TheBully: Regularly mistreats Baljeet on-screen.
%%* BullyAndWimpPairing: With Baljeet.
* CardCarryingVillain: More like "Card Carrying Bully". Loudly and frequently proclaims himself to be a bully, and constantly abuses Baljeet in case anyone around didn't get the message.
* {{Catchphrase}}: "I want the ___."
** "Buford loves ___."
** He also has a tendency to say "Witchcraft!" when he sees something he doesn't quite get.
** "I am so in love with her right now."
* CharacterizationMarchesOn: In his early episodes, he was just a bad bully. However, after the "goldfish" episode, he showed more of his kinder side and is now pretty much a kid who is sometimes violent but overall nice.
* ChildProdigy: Buford shows flashes of this, from quoting Voltaire in "Summer Belongs to You" to knowing King Wenceslas' background on the Christmas album.
** He also speaks perfect French, much to Baljeet's surprise. He offhandedly says it was easy to learn due to it's similarity to Latin.
** He also is able to play quite a few musical instruments, including the drums and the piccolo.
** It appears he also strives to hide it; in the supercomputer episode, he [[OffhandBackhand smacks]] the mind-scanning screen when it displays an incredibly complex mathematical formula.
* TheChewToy: He becomes this from time to time in recent episodes.
* CowardlyLion: Whenever he's faced with something he's actually afraid of, such as giant squid or the pharmacist zombies.
* CrazyPrepared: If you happen to need some obscure musical instrument, he'll have it with him. He lampshades this in "My Fair Goalie".
** This:
-->'''Buford:''' Here's the velvet rope! I never leave home without my velvet rope.
-->'''Phineas:''' Um, [[LampshadeHanging where do you keep that?]]
-->'''Buford:''' [[{{Hammerspace}} Oh, I'll never tell.]]
** He also, for some reason, has life-sized moulds of all his friends, which comes in handy when Candace gets accidentally turned into liquid form by one of Phineas and Ferb's inventions.
** In "Bully Bust", he prepares for almost every possible contingency when preventing Phineas and Ferb's invention from disappearing, except for random green rays from the sky.
* CreatorCameo: Voiced by Bobby Gaylor, one of the show's writers.
* CuttingTheKnot: Has a talent for this, such as in "Atlantis" where, when faced with a door to the underwater city covered in hieroglyphics detailing an undoubtedly complicated sequence for opening it, Buford simply punches the door open. And, of course, his [[GettingCrapPastTheRadar infamous]] jellybean eating in "We Call It Maze"
** He even explains the TropeMaker story in "Knot My Problem".
* DeadpanSnarker: Often quick to voice his displeasure this way.
* DefeatMeansFriendship: He and Phineas become friends after Buford beats him at thumb wrestling.
* DisappearedDad: His father is never shown.
* DumbMuscle: At least, that's what he prefers coming across as.
* EvenBadMenLoveTheirMamas: Which, we assume, is why he named his goldfish after her.
%%* FourTemperamentEnsemble: Choleric.
%%* FriendlyEnemy: With Baljeet.
* FriendOrIdolDecision: [[spoiler: In "Bully Bromance Breakup", he begins working with Doofenshmirtz to take over the Tri-State Area. However, upon being told he'd never get to see his friends again, Buford decides to quit and return to being a one-nerd bully.]]
* {{Gasshole}}: His character on Team Improbable, [[ExactlyWhatItSaysOnTheTin Belch Man]]. Especially since he brings up [[PersonalityPowers personality power]] implications.
* GeniusBruiser: He speaks perfect French. Then goes on to quote Voltaire later in the same episode.
** As if that wasn't enough, his song in the P & F Holiday Favorites Album CD had him state a brief historical background about the song "Good King Wenceslas" to the tune of said song, surprising Baljeet.
** He also gets into a short tangent about PersonalityPowers.
** In the TV movie, he's revealed to collect existentialist trading cards.
** We later learn that WHY he learned French--so that he could win over a girl. But, apparently, [[VoodooShark it was easy for him, because many of the words were similar to their Latin roots.]]
** And he was quicker to understand Phineas's jargon in "Cranius Maximus" than Baljeet.
** Furthermore, a depiction of his brainwaves showed a series of complex math equations (the same as what was revealed for Phineas). [[ObfuscatingStupidity He quickly punches out the transmission before anyone notices.]]
** In "The Inator Method" he shows that he knows enough about the planets (or mythology) to know that the ancient Greek name for Uranus is Ouranos.
* HeroicSacrifice: When he [[spoiler:sacrifices his memories of Perry as a secret agent so that Perry can remain Phineas and Ferb's pet]] in TheMovie. In "Night of the Living Pharmacists", he [[spoiler:charges at the zombies as a distraction after Baljeet is zombified in order to buy time for his remaining friends]].
* HiddenDepths: Surprisingly knowledgeable and philosophical at times.
* IJustWantToHaveFriends: His only friend as a child was a gold fish.
* {{Jerkass}}: To Baljeet, constantly pranking and tormenting him.
* JerkWithAHeartOfGold: In other cases, like the Christmas special, etc. many times. Baljeet only snaps when Buford decides to use a ''plastic bag over a paper bag at a store.''
* JerkWithAHeartOfJerk: In the Meatloaf Festival episode.
* LaserGuidedAmnesia: [[spoiler: As a HeroicSacrifice at the end of TheMovie.]]
* LeeroyJenkins: This is his usual mode of operation when action is called for. He even parodies the TropeNamer in "The Klimpaloon Ultimatum".
* ObfuscatingStupidity: Tends to backtrack when he realizes that he has deviated from his "dumb bully" persona.
* PetTheDog: He likes animals. The whole reason he became the local bully in the first place was to protect his goldfish. He's also befriended a flamingo-like alien and taught domesticated squirrels to dance.
* PrecociousCrush: On Candace, apparently. As evidenced by his sneaking his number into her cellphone, and being very upset when she won't abide by the Bully Code and serve him for his having saved her life.
** This might also explain why he refused to let Candace and Jeremy into the restaurant in "Chez Platypus". [[FridgeBrilliance He wanted to ruin their date out of jealousy]].
* PunchClockVillain: A bully variant. In his second appearance. These days it's rare for him to be a real bully period, except towards Baljeet. WordOfGod confirms that his bullying tendencies are more to keep up his self-made image of being a bully rather than out of malice.
** Teenage Buford has abandoned it entirely in favor of embracing his Francophile ''artiste'' side, and is at worst somewhat pretentious.
* PungeonMaster: In "Remains of the Platypus", his main job was to unload the cheese puns.
* RealMenWearPink: He's expressed the desire to float around like a woodland pixie. [[DidIJustSayThatOutLoud He didn't mean to say it out loud though]]. In one episode, he really gets into quilting. (In contrast, everyone else in the group found it boring.)
%%* RedOniBlueOni: The red to Baljeet's blue.
* SandInMyEyes: A variant. He claims that he is "sweating through his eyes" when he cries and on another occasion ''transferred his own tear to Baljeet'' for the sake of denial. However, question him on whether he is sweating through his eyes, and [[CommanderContrarian he will admit that he is crying]].
%%* SensitiveGuyAndManlyMan: Manly Man to Baljeet's Sensitive Guy.
* ShoutOut: His pet fish has the same name as [[Franchise/BackToTheFuture Biff Tannen]], whose ancestor shares ''his'' name with [[Film/BackToTheFuturePartIII Buford]].
%%* SophisticatedAsHell
* StoutStrength: The most massive of the kids and physically strong.
* TemporarilyAVillain: In "Hip Hip Parade."
* ThirdPersonPerson: Inconsistently but yes.
* ThoseTwoGuys: With Baljeet.
* TokenEvilTeammate: One bully is out of place in a group of girl scouts and [[NiceGuy nice boys]]. Lampshaded in the Christmas Special, with Buford being the only of the kids listed as "Naughty" after the destruction of the Naughty-Inator.
* TookALevelInKindness: Upon befriending Phineas and the rest of the gang.
* UnfortunateNames: His last name is Dutch for "of the stupid" according to [[http://phineasandferb.wikia.com/wiki/User:Topher208/Dan_Povenmire_Correspondence Dan Povenmire]] (after removing the second "m" from Stomm).
** His mother may at one point have counted having the name "Biff" later revealed to be short for Biffany.
* UnscrupulousHero: Buford may [[CardCarryingVillain boast about being a schoolyard bully]], but when Phineas and Ferb need help, he can always be counted on.
* VitriolicBestBuds: With Baljeet. They even have a song about this.
* VocalEvolution: His distinctive raspy voice hadn't yet been fully ingrained in his earliest appearances.
* WhyDidItHaveToBeSnakes: He is afraid of giant squid. He gets over it when he defeats one in combat to protect his goldfish.
* YouKillItYouBoughtIt: A "beating up" variant. Became the local bully by beating up the previous one to defend his goldfish. [[FridgeBrilliance Probably why he's an all-around better guy than bullies usually are.]]

[[folder:Irving Du Bois]]
[[caption-width-right:180:This is what you'll become if you love your idols a little too much.]]
->''"Phineas and Ferb rock!! Wooo!!!"''
-> Voiced by: Jack [=McBrayer=]

A nerdy local kid who was introduced in "Hide and Seek" as an obsessive fan of Phineas and Ferb and their ambitious antics. He tags along with their daily projects on occasion in later episodes. When he's not geeking out over Phineas and Ferb, Irving can be seen butting heads with his equally geeky older brother Albert.
* AbsurdPhobia: He fears, of all things, the color lavender.
* AllThereInTheScript: His last name. Confirmed by Swampy Marsh on Twitter after not being mentioned in the show... yet.
* AmbiguouslyBi: He stalks Phineas and Ferb and hits on Candace and Stacy.
* AnnoyingYoungerSibling: To his brother Albert.
* AscendedFanboy: While one could say he was this from his introductory episode, a better case would be made for his going from a largely ignored TagalongKid to Phineas gladly accepting his help on a project in "Doof Side of the Moon", and his friends having no problem taking his advice planning Phineas's birthday in "Phineas' Birthday Clip-O-Rama!"
* CasanovaWannabe: He's tried his luck with Candace and most of the Fireside Girls, but [[ShipperOnDeck interestingly]], flirting with Isabella is the ''least'' likely thing he'd do.
* CharacterizationMarchesOn: While he remains a complete LoonyFan to Phineas and Ferb, his episodes show him steadily becoming less irritating about it, and he eventually goes from a TagalongKid to a welcomed member of Phineas and Ferb's inner circle.
** Adding Albert to the show also gives him something to do ''other'' than obsess over Phineas and Ferb, making him a bit more rounded.
* CloudCuckoolander: Not quite as extreme a case as some, but Irving is kind of...odd.
-->'''Irving:''' [[ItMakesSenseInContext "Aw! I had my thumb over my mind the whole time!"]]
* CrouchingMoronHiddenBadass: It's implied that he defeats numerous [[spoiler:Normbots on his own during the final battle in the movie, in the Beak suit's detached lower half.]]
* DropInCharacter: He makes his first appearance showing up at Phineas and Ferb's place uninvited and implies that he regularly does so.
%%* FourTemperamentEnsemble: Leukine
* HeroWorshipper: Of Phineas and Ferb.
* HiddenDepths: He only knows one song, but can perform it well enough to become a global sensation.
* TheIntern: He works as one for O.W.C.A. ten years in the future.
%%* LoonyFan: Of Phineas and Ferb.
* LowerDeckEpisode: "Not Phineas and Ferb".
* MetaGuy: He demonstrates extreme awareness of {{Running Gag}}s and other aspects of the cartoon, even by the standards of the show.
* MissionControl: He serves as this on several occasions when Phineas and Ferb have gone into space.
* MyFriendsAndZoidberg
-->'''Phineas:''' Friends, bullies, Irving...
* NonActionGuy: In his debut, he tries to help the others fight a robot and fails epically.
* PalantirPloy: Has a complex network of spy cameras set up all over Danville just to capture Phineas and Ferb's exploits, and he proves it by providing footage for the clip show in "Phineas' Birthday Clip-O-Rama!". Already impressive, but some of this footage is from "Phineas and Ferb get Busted", [[FridgeLogic which means that he somehow managed to]] set up a spy camera in Candace's dream [[spoiler:''within Perry's dream''.]]
* PrecociousCrush: In few episodes he hits on Candace and/or Stacy, though this was probably just meant as a single one-off joke in this show's perpetual ShipTease.
* RememberTheNewGuy: In his first appearance in "Hide and Seek".
-->I'm mostly in the background.
* ShipperOnDeck: It's shown that the least likely thing for him to do is hit on Isabella, which is probably because he, like a lot of the show's fans, ships her with Phineas.
* SixthRanger: He's becomes one for Phineas and Ferb's group.
* StalkerWithoutACrush: Has shades of this. "I got in the car when your mom stopped for gas", anyone?
* TagalongKid: He acts like this at first. It's toned down a bit after "Atlantis".
* TheTeamWannabe: He has to actively try and join the group in his early appearances and is treated more like a tagalong. Over time he becomes a more accepted, if irregular, member.
%%* ThisLoserIsYou
* WartsAndAll: Gets a brief moment of this towards Phineas in "Hide and Seek", when he finds out that Phineas relies much more on [[IndyPloy improvization]] than he thought. He gets over it quickly, though.

[[folder:The Fireside Girls, Troop 46321]]
[[caption-width-right:350:From left to right: Milly, Gretchen, Ginger, Holly, Katie, Adyson]]
->'''Gretchen:''' ''"Would that be electronically fuel-injected?"''
->'''Holly:''' ''"It just smells like feet in here!"''
->'''Katie:''' ''"Excuse me, Phineas. Can I get you to sign some liability waivers?"''
->'''Adyson Sweetwater:''' ''"Lemme guess, the Let's Help Phineas and Ferb Patch?"''
->'''Milly:''' ''"Again, forget the idea of little people in there."''
->'''Ginger Hirano:''' ''"Why don't we ever go see what Baljeet is doing?"''

-> Voiced by: Creator/ArielWinter (Gretchen), Cymphonique Miller (Seasons 1 & 2)/Diamond White (Seasons 3 & 4)/Dana Davis ("Act Your Age") (Holly), Isabella Acres/Soleil [=McGhee=] ("Act Your Age") (Katie), Madison Pettis (Adyson), Isabella Murad/Dannah Phirman ("Act Your Age") (Milly), Tiffany Espensen (Seasons 1 & 2)/Michaela Zee (Seasons 3 & 4)/Ming-Na Wen ("Act Your Age") (Ginger)

A group of Isabella's friends from the local Fireside Girls troop. Whenever she helps out with one of Phineas and Ferb's schemes, they often end up getting pulled into the antics too.
* {{Action Girl}}s: They are very mechanically skilled and capable of some crazy stunts. Some of their achievement patches require very physically demanding activities.
* AscendedExtra: Ginger has had noticeably more focus than the others starting in season 4, probably because her relationships with Stacy and Baljeet provide additional dynamics beyond simply being backup support for the title characters.
* BadassAdorable: The Fireside Girls can earn patches for wrestling ''alligators'' and ''moving mountains''...
** Their theme song even includes the lyrics "We stand cute, small, and strong."
%%* BrainyBrunette: Gretchen.
* ButtMonkey:
** Ginger in "Isabella and the Temple of Sap" whenever she expresses attraction to Baljeet.
** Adyson gets hit hard with it in "The Great Indoors," undergoing several accidents.
* CannotKeepASecret: Milly, as implied at the end of "Operation Crumb Cake".
* ChildProdigy: Gretchen.
* {{Cloudcuckoolander}}: Katie is shown to be this several times.
* CrazyPrepared: Thanks to the Fireside Girls Manual, they are ready for anything from scouting an old abandoned amusement park to repairing a time machine.
* DeadpanSnarker: Ginger in "Bee Story".
* EarlyBirdCameo: Ginger and Katie appear in a crowd shot in "Rollercoaster."
* {{Expy}}: Gretchen has reddish-brown hair, wears glasses, is around nine-ish, speaks in SesquipedalianLoquaciousness... just like ''another'' [[WesternAnimation/{{Recess}} Gretchen]].
** Short. Short hair. Small eyes. Glasses. [[WesternAnimation/HeyArnold Pheebs]], is that you?
* {{Gadgeteer Genius}}es: Most of the time they're just helping the title characters out in the background (which is impressive enough in itself), but they can also build a time machine on their own given only a blueprint (and it was a ''flawed'' blueprint too [[note]]Even though the "flaw" consisted of a [[SugarWiki/FunnyMoments spelling error]][[/note]]).
* GirlishPigtails: Holly and Katie.
* GreatBigBookOfEverything: The Fireside Girls Manual has instructions for everything the girls need to do for the plot.
* GreenEyedMonster: "Act Your Age" shows that when Ginger started dating Baljeet she developed a long-standing jealousy of his childhood friend Mishti given Adyson's long-suffering admonition to "let it go" when Ginger mumbled angrily about Mishti.
* HairDecorations: Milly wears a yellow bow in her hair, Adyson wears a headband, and Holly and Katie have hair bands.
* HeroicSacrifice: When they [[spoiler:sacrifice their memories of Perry as a secret agent so that Perry can remain Phineas and Ferb's pet]] in TheMovie.
* HeroOfAnotherStory: Shown especially in their {{Lower Deck Episode}}s.
* {{Hypercompetent Sidekick}}s: Not only to the boys, but also to Isabella (who is herself an example of this trope). One of the most notable demonstrations of this is in "It's About Time!"
* InexplicablyAwesome: It's only spotlighted occasionally, but they harbor a mind-bogglingly immense array of skills between them.
* TheLancer: Gretchen in "Isabella and the Temple of Sap", Adyson in "Summer Belongs to You".
* LaserGuidedAmnesia: [[spoiler: As a HeroicSacrifice at the end of TheMovie.]]
* LetUsNeverSpeakOfThisAgain: In "Bee Story", Gretchen prevents Isabella from flashing back to the last time they failed to earn a beekeeping patch last year.
* LowerDeckEpisode: "Isabella and the Temple of Sap" and "Bee Story".
* MagicSkirt: An example of this in "De Plane! De Plane!" where the music segment has the Fireside Girls standing on each other in a big, vertical human circle. Their skirts flutter in the wind, but they're otherwise going straight towards their feet.
%%* {{Meganekko}}: Gretchen.
* MeritBadgesForEverything: Not literally ''everything'' (for example, they explicitly don't have a Persistence Patch), but still an enormous number, and frequently for the most ridiculous and unthinkable achievements.
* NoodleIncident: In "Isabella and the Temple of Sap" they hung out with Baljeet to earn a patch, with Holly saying it wasn't worth it.
** There's also whatever happened that kept them from getting their beekeeping patches the first time.
* OfficialCouple: Ginger with Baljeet, as revealed in "Act Your Age".
* OnlyOneName: All except Adyson and Ginger, whose last names are Sweetwater and Hirano, respectively.
* PuppyDogEyes: Their method of getting people to buy their cupcakes.
* {{The Reliable One}}s: Always ready to lend a hand and can be counted on to complete any task they are assigned.
* ScoutOut: Evidently based on the Girl Scouts.
* SesquipedalianLoquaciousness: Gretchen, going so far as to ''say'' sesquipedalian in the show to demonstrate her prowess at it.
* [[ShipperOnDeck Shippers on Deck]]: They sometimes tease Isabella about her crush on Phineas, but are ultimately supportive of her. They are not nearly as understanding towards Ginger's attraction to Baljeet, however.
* ShorterMeansSmarter: Gretchen is the shortest of the Fireside Girls for most of the series. However, "Act Your Age" shows that she subverts this in their teen years, when she has become the tallest.
* TheSmartGuy: Gretchen. Ginger also gets to do the part in "Bee Story" thanks to a ChekhovsLecture from Baljeet.
* StrongFamilyResemblance: Ginger looks like her older sister, Stacy.
%%* TokenMinority: Holly and Ginger.
* TrueCompanions: They stick together and work extremely well as a team. The entire group is shown to still hang out with one another even ten years later in "Act Your Age", presumably long after they have stopped being actual Fireside Girls.
* {{Tuckerization}}: Adyson is named after Swampy's granddaughter.
* VocalDissonance: In "Out to Launch", Gretchen is shown to be capable of speaking in a surprisingly deep voice.
* WhatDoesSheSeeInHim: When Ginger enthusiastically expresses interest in Baljeet, the other girls just stare at her like she said something weird.
* WrenchWench: They're just as mechanically skilled as the title characters.

[[folder:Jeremy Johnson]]
[[caption-width-right:320:The man who keeps the main characters' sister in check.]]
->''"Y'know, Candace, I've had a lot of fun in your backyard, but this is the best time yet."''
-> Voiced by: [[Series/HannahMontana Mitchel Musso]]

A nice and easy-going local boy who is the object of Candace's affections. He works at the local fast-food outlet, Mr. Slushy Burger, and plays in a band, "Jeremy and the Incidentals". Later episodes expand on his originally flat characterization, giving him a bit of a snarky side when Candace is freaking out over something or another.
* AlliterativeName: '''J'''eremy '''J'''ohnson.
* BirthdayEpisode: "Cheers for Fears".
* BoyNextDoor: To Candace. A rare male example.
* CatchPhrase: "That's my girl!" when Candace does something quintessentially Candace-like.
* CharacterizationMarchesOn: In episode one, he was just "the guy" Candace liked, episodes afterwards made him just "the NiceGuy who cheered Candace up". After that, the show slowly chipped away at his RelationshipSue-ness, revealing things such as the fact that he is the lead singer in a band and is very dedicated to his little sister, Suzy. Now he's a NiceGuy who likes British things that is on occasion a DeadpanSnarker that messes with Candace's literal mind but still likes her just for who she is. He also, for some reason, carries a drain unclogger around.
%%* DeadpanSnarker: Though a very nice one.
%%* FourTemperamentEnsemble: Phlegmatic.
* HairOfGoldHeartOfGold: Jeremy has blond hair and is a {{nice guy}}.
* HeroicSacrifice: When he [[spoiler:sacrifices his memories of Perry as a secret agent so that Perry can remain Phineas and Ferb's pet]] in TheMovie.
* HeWhoMustNotBeSeen: Averted. He was originally going to be an unseen character referenced only in conversations. Mitchell Musso, meanwhile, had been cast as Ferb, but when the creators decided to make him British they wanted to retain Musso's voice, expanding on Jeremy as a result.
* ICantDance: Revealed in "Nerdy Dancin'".
* LaserGuidedAmnesia: [[spoiler: As a HeroicSacrifice at the end of TheMovie.]]
* NiceGuy: ''Very'' nice, which is [[SingleWomanSeeksGoodMan lucky for Candace]]. Seriously, this guy's a total sweetheart
* TheNicknamer: Though it's only come up in the episode "The Baljeatles".
* OfficialCouple: With Candace.
* OnlySaneMan: Jeremy fits this trope pretty well, particularly when he is with Candace. Also, while Jeremy does get in on the show's zaniness, once in a while, one can see the "huh"-type expression on his face. Case in point:
-->'''Phineas:''' So if we just find Mom, [[ItMakesSenseInContext we'll find]] ''[[ItMakesSenseInContext both]]'' [[ItMakesSenseInContext Candaces]]!\\
'''Jeremy:''' Uh... tell them I said hi...?
* PrettyBoy: Candace certainly thinks he is.
* RunningGag: We ''never'', ''ever'' get to hear a Jeremy and the Incidentals song all the way through. We either hear the first few lines only for the action to cut away, or we cut to Jeremy singing just as he's wrapping up.
* SatelliteLoveInterest: A few episodes tried to expand on his characterization, but for the most part, he didn't seem to have any personality except "ambiguously (or not) likes Candace". Later episodes fix this a bit, giving him some more personality. He's calm, mature, responsible, and hardworking. He's also incredibly dedicated to his sister Suzy, has his own friends, and responds to Candace's antics with some accepting amusement and snarking.
* SingleTargetSexuality: He does not seem interested in other girls, but only Candace.
* ThrowTheDogABone: He embodies this trope for Candace - the boys' invention will have vanished, her mom thinks she's making it up and she just looks like a fool...but then Jeremy will do something nice for her.
* UnfazedEveryman: He pretty much just rolls with whatever weird stuff goes on around him, including his girlfriend's often erratic behavior.
* UnrequitedLoveSwitcheroo: The episode ''Knot My Problem'' implies that he had a crush on Candace when they were in grade school together, completely unbeknownst to her.
* VictoriousChildhoodFriend: With Candace, though later than most examples.

[[folder:Stacy Hirano]]
[[caption-width-right:320: The more level-headed best friend.]]
->''"Oh, lighten up, Candy."''
-> Voiced by: Creator/KellyHu

Candace's best friend since childhood. Stacy is remarkably more laid-back and unfocused than Candace, and usually tries (with little or no success) to convince her to lighten up over busting Phineas and Ferb, trying to impress Jeremy, or whatever else Candace is worrying about. [[spoiler:She also knows about Perry's secret identity.]]
* ActionGirl: When the situation calls for it. She helps fight off the Norm Bot invasion in the movie. Parodied in "Phineas and Ferb Busters", when Candace makes her and Jenny go through some physically taxing exercises so they can assist her in busting Phineas and Ferb.
* ADayInTheLimelight: "Put That Putter Away" and (unexpectedly) [[spoiler:"Happy Birthday, Isabella"]].
* AllWomenLoveShoes: Stacy seems to love shoes enough to make a gelatin mold of some pumps.
* AscendedExtra: In the early episodes, she appeared only infrequently, if at all (she was originally just an unheard voice on the other end of Candace's cell phone conversations). As the series progressed, she appeared much more often, and has played a role in the plot of some episodes ("Put that Putter Away", "Elementary my Dear Stacy", "Phineas & Ferb-busters", "The Lemonade Stand"). In fact, it was almost rare to see a episode after Season 1 (and before "Night of the Living Pharmacists") where she doesn't appear, even if it's only for a scene or two.
* AsianAirhead: Type II and a mild case at best. She has occasional {{Cloudcuckoolander}} tendencies and is sometimes shown to lack basic knowledge about geography, but Candace's own personal manias make Stacy the more level-headed one fairly often.
* AttentionDeficitOohShiny: Stacy has problems focusing on catching the boys, particularly when they're doing something she finds cool, like miniature golf. At least some of it is because she doesn't have a personal stake in busting the boys, she's just helping her friend.
* BetaCouple: With Coltrane. However, he rarely appears.
* BookDumb:
-->'''Candace:''' Do you know what they have in France?
-->'''Stacy:''' The pyramids?
** And later:
-->'''Candace:''' Oh, and Stacy, [[LampshadeHanging pyramids? Really?]]
-->'''Stacy:''' Oh, I get it. Those are Belgium, right?
* ButtMonkey: In several episodes, such as "Spa Day".
* CatchPhrase: "Would you call my mom and tell her that?" whenever Candace calls her a genius.
* CharacterizationMarchesOn[=/=]CharacterDevelopment: Stacy is starting to look like the [[OnlySaneMan sane girl]] to Candace's busting-obsession neurotic teenager and tends to be skeptical of her more insane claims. Made very clear in TheMovie.
* ChildhoodFriends: She and Candace have shared an enduring friend relationship. It is unknown when they met or how they became friends. What is known is that their relationship can be traced as far back as the third grade, when they were trying to impress a boy named Billy Clarke, as mentioned in "Spa Day".
* {{Cloudcuckoolander}}: On some occasions, such as in "Ready for the Bettys". Subverted most of the time though, with her being the more grounded one compared to Candace.
* CoolBigSis: Ginger views her as one.
* DeadpanSnarker: Towards Candace a lot. At one point she even rebukes herself for being "too deadpan."
* DisappearedDad: Her father never appears or mentioned.
* FoolishSiblingResponsibleSibling: A downplayed trope, with Stacy being the lazy, underachieving teenager to Ginger's trophy-winning, mountain-moving Fireside Girl.
%%* FourTemperamentEnsemble: Sanguine
* HairDecorations: Her blue hair bow.
* HandyFeet: She was apparently able to clean her whole bedroom with her feet, [[TakeOurWordForIt though we never saw it]].
* HeroicSacrifice: When she [[spoiler:sacrifices her memories of Perry as a secret agent so that Perry can remain Phineas and Ferb's pet]] in TheMovie.
%% She does not have a Hime cut. It's just long hair with bangs. Don't add it.
* InformedAbility: According to her Top Trumps playing card, she's into figure skating, despite never showing this trait in the show.
* LaserGuidedAmnesia: [[spoiler: As a HeroicSacrifice at the end of TheMovie.]] And then [[spoiler:averted in "Happy Birthday, Isabella".]]
* NotSoAboveItAll: She will sometimes go along with Candace's {{Zany Scheme}}s, even right after pointing out their flaws.
* ObfuscatingStupidity: In "Canderemy", Doofenshmirtz's latest creation has Candace and Jeremy (the latter sleeping) joined at the hip after Candace has promised Stacy not to so much as mention Jeremy for the entire day. Candace spends the entire day hiding Jeremy in more and more wildly improbable places so Stacy doesn't catch on and get angry. Eventually, the situation is resolved and Stacy says the following:
-->'''Stacy''': By the way, the best part was when you used him as a table.
* OfficialCouple: With Coltrane.
* OnlySaneWoman: ''Especially'' when compared to [[SanitySlippage Candace]].
* OutOfFocus: Following "Night of the Living Pharmacists" she makes no appearances aside from a reused clip in the finale. Since this episode, Vanessa more or less takes over her role as Candace's most frequent friend and companion.
* SatelliteLoveInterest: Coltrane to her.
* SecretKeeper: At the end of [[spoiler: "Happy Birthday, Isabella", Stacy learns that Perry is a secret agent. She promises to keep this secret, and Perry agrees not to wipe her memory]].
** As of "Druselsteinoween" she's now assisting Vanessa in keeping her relationship with Monty secret from Major Monogram.
* SpellMyNameWithAnS: Her name is sometimes misspelled "Stacey", but that's actually the masculine variant of the name.
* StraightMan: Becomes this to Candace over time, as Candace's neurotic tendencies [[{{Flanderization}} become more and more apparent.]]
* StrongFamilyResemblance: All of her female relatives in Tokyo look like clones of her. Also, her little sister Ginger.
* TokenMinority: She and her family are Japanese.
* UnfazedEveryman: Even [[spoiler:Perry and Doofenshmirtz crashing a truck straight into her home and proceeding to fight all over the living room]] doesn't faze her nearly as much as one might expect.
* ZettaiRyouiki: Switches between Grades C and B.

[[folder:Carl Karl]]
[[caption-width-right:320:[[http://www.youtube.com/watch?v=0tLRXjsLyn4 He works the camera]].]]
->''"Sorry about that, sir."''
-> Voiced by: Tyler Mann

Major Monogram's assistant, a nerdy college intern working for O.W.C.A. who occasionally banters back and forth with Monogram while Perry the Platypus is being sent out on a mission.
* ActionSurvivor: In "Save Summer", he helps Perry and Monty sneak into the headquarters of LOVEMUFFIN but is noticeably (and understandably) less involved in the action than they are.
* {{Adorkable}}: He's a goofy guy with glasses, and is very cute in appearance.
* AlliterativeName: Sort of. '''C'''arl '''K'''arl.
* AwesomenessByAnalysis: [[spoiler:Which makes him quite a competent threat after being turned evil. He was able to infer Perry's whereabouts correctly by identifying an obscure flower he saw in the background while video-calling Perry.]]
* ButtMonkey: In the sense that he is frequently berated and ignored, often unfairly.
* TheCassandra: On the rare occasions where he acts as the voice of reason to Monogram, he is almost always unacknowledged or entirely ignored. And on one occasion ("Undercover Carl") where Monogram does take heed, he turns out to be wrong.
* CelebCrush: [[Film/TeenBeachMovie Maia Mitchell]].
* CrazyPrepared: He built robotic duplicates of the Flynn-Fletcher family in case one of them gets their memories erased. Major Monogram is a bit freaked out.
* DistaffCounterpart: Carla, who is implied a relative of his.
* DitzyGenius: Not to the same extent as Doofenshmirtz, but he does blunder often and spends a lot of time goofing off with Monogram. Yet [[spoiler:his intelligence makes him one of the most competent villains in the entire series when he is turned evil]].
* DudeWheresMyRespect: [[spoiler:"Where's Perry" explores this heavily, with this being his main motivation after being turned evil. Monogram finally grants him some respect at the end of the episode.]] Also comes up in "Thanks But No Thanks", in which he points out that Monogram has ''never'' thanked him for all the work he does at the agency.
* {{Expy}}: He has been compared appearance wise to WesternAnimation/KingOfTheHill character Hank Hill.
%%* FourTemperamentEnsemble: Leukine
* GadgeteerGenius: Not shown very often, but he did create functional robot duplicates of the Flynn-Fletcher family (and then some).
* HiddenDepths: When Carl finally gets a song of his own in "Where's Perry?", Monogram admits that he's a good singer, [[spoiler:despite it being his villain song]].
* TheIntern: Works as one in the O.W.C.A.
* LatexPerfection: His standard disguise as a black, female clerk is pretty convincing.
* LowerDeckEpisode: "Undercover Carl".
* {{Mecha Mook}}s: [[spoiler:Uses these when he is turned evil]].
* MissionControl: Rarely, but he gives Perry his missions when Monogram is unavailable.
* MundaneMadeAwesome: His theme song makes all the mundane jobs he does sound awesome.
%%* {{Nerd}}
* NonActionGuy: Despite working at an agency that employs badass secret agents, his job is to complete menial tasks like working the camera and fixing paper jams. [[spoiler: He does manage to subvert this a little in "Where's Perry", but still mostly relies on his MechaMooks.]]
* NonPromotion: Is given the title "Paid Intern" in "Where's Perry?", but it's just a title and doesn't actually grant him any pay. He's still happy about it.
* NotSoHarmlessVillain: Carl is a bit of a wimp, [[spoiler: but when he turns evil in ''Evil For Extra Credit'', he is shockingly competent and dangerous.]]
* RepetitiveName: The end credits initially misspelled his name with a K, which was then [[AuthorsSavingThrow explained away]] as his last name.
* SecretKeeper: For Monty and Vanessa's relationship.
* SpellMyNameWithAnS: The character's first name is officially spelled Carl on the show, despite the ends credits spelling it with a K. Perhaps due to this, "Ain't No Kiddie Ride"'s credits lists him as Carl Karl.
* TemporarilyAVillain: [[spoiler:In "Where's Perry?" when he is hit with the Ultimate Evil-Inator and turns evil]].
* ThoseTwoGuys: With Major Monogram.
* VillainSong: "Evil for Extra Credit", [[spoiler:when he's turned evil by one of Doofenshmirtz's -inators in "Where's Perry?".]]
* WellDoneSonGuy: Carl would like to have been Monogram's son and he does everything to please him.
* WouldHurtAChild: [[spoiler:When turned evil, he lures Perry out of hiding by putting Phineas, Ferb, and their friends in danger.]]
* YouAreInCommandNow: Temporarily in "Save Summer" when Monogram is fired. He is rather overwhelmed by the new responsibility.
** Ten years later in the future, he becomes an O.W.C.A. Commander for real, and appears to be handling things well enough.

[[folder:Vanessa Doofenshmirtz]]
[[caption-width-right:336:"Yeah, whatever."]]
->''"I '''so''' should've gone to summer school."''
-> '''Voiced by:''' Olivia Olson

Dr. Doofenshmirtz's teenage daughter. When she's not being embarrassed by her father's bungling attempts at being evil, she's being embarrassed by his attempts at doting on her. Despite all that, she does love him.
* ActionGirl: Just watch "Vanessassary Roughness" where it shows what she's capable of when motivated. Her IAmSong [[https://www.youtube.com/watch?v=8FuAesVmWLo "I'm Me"]] from that episode showcases her in action.
* AllGirlsWantBadBoys: {{Deconstructed}}. She had a thing for "bad boys", which one of the reason she dated Johnny. However, in “Minor Monogram”, Vanessa broke up with him because she thought Johnny felt that a video game was more important than her. Afterwards, she decided to be a SingleWomanSeeksGoodMan.
* AloofDarkHairedGirl: Tall? Aloof and composed? Dark haired? She's three for three.
* BirthdayEpisode: The B-plot of "Dude, We're Getting the Band Back Together".
* BrattyTeenageDaughter: Vanessa has her moments.
* TheCassandra: When she tries to tell her mom that Dr. Doofenshmirtz is evil.
* CharacterizationMarchesOn: After only two episodes of showcasing it, the above-mentioned TheCassandra quality seems to have been dropped from her character, perhaps to serve as a parallel to Candace since those episodes were a reversal of the show's usual formula. Part of it is because in later seasons, she realizes deep down, there is good in him and just needs help.
* DaddysGirl: Their father-daughter relationship is somewhat strained, Doof being an incredibly embarrassing OverprotectiveDad who's divorced from Vanessa's mom, but she clearly cares a whole lot about him.
** Doofenshmirtz goes to crazy lengths to make his daughter happy, even if he's wrong about what would make her happy. The one slam dunk he made was finding a Mary MacGuffin doll for years after Vanessa had given up looking for one and she was so happy she sang a song about how he's "Not so bad a dad after all."
* DaddysLittleVillain: Slightly subverted, and by slightly subverted I mean, completely subverted! Sometimes...
** "Finding Mary McGuffin" does have her do something nasty, though.
** As does "Summer Belongs To You" where she [[BlatantLies "rents"]] a scooter and later holds up Major Monogram and Perry to rescue her father.
** She is Daddy's Little Villain, what with her stealing her father's {{Catchphrase}} when she's carried off by her father's Pick'emUp-Inator in "Candace Disconnected".
** In "What'd I Miss", she acts as his henchman. Granted, all she had to do was hand him a ray gun, and then she could go back to relaxing on the beach (and it probably helped that Doof had to execute his plan on the beach in the first place). But it's still interesting to notice that she didn't seem to mind. Not even one snarky remark!
** Ultimately averted however. [[spoiler: Not only does she never truly become evil, she joins the heroes and ultimately convinces Doofenshmirtz to give up evil as well.]]
%%* DarkActionGirl: Depending on the episode.
* DatingCatwoman: With Monty Monogram.
* ADayInTheLimelight: "Vanessassary Roughness".
* DeadpanSnarker: "I should have gone to summer camp!".
* TheDragon: To her dad sometimes.
* DudeMagnet: Several guys in the show attempted to hit on Vanessa. Ferb has an obvious PrecociousCrush on her, Johnny was her boyfriend (in “Dude, We're Getting the Band Back Together” and “Brain Drain”) and after she broke up with him she dated Monty, Monogram's son.
* EvilCounterpart: Vanessa isn't evil but in the song "Busted" and in the episodes "Finding Mary McGuffin" and "Hail Doofania" she does come across as a DarkerAndEdgier counterpart to Candace, even in their respective relationships with their fathers, sometimes.
%%* ForeheadOfDoom
%%* FourTemperamentEnsemble: Melancholic
* FreakyFashionMildMind: She wears a {{Goth}} style and has a bit of a sarcastic streak, but she can be quite friendly to others, as shown in "Summer Belongs To You."
* {{Goth}}: People keep referring to her (or more often her look) as a goth, but she refers to her clique as being punks.
* HypocriticalHeartwarming: While she hardly respects her father that much, she won't stand for Monty insulting him; she doesn't even take kindly to those who would betray her father for more nefarious purposes, as shown in "Minor Monogram" where she is horrified to witness her father being betrayed by Rodrigo, who plans to destroy the Tri-State Area by splitting it into two.
--> '''Rodrigo''': (after betraying Doofenshmirtz) Join me, Vanessa, and together we will take over the world. I'll let you get a tattoo. I think boots should come in pairs, like people.\\
'''Vanessa''': (angrily) Join you? I don't work for him! That's my father, you dweeb!
* ImpossibleHourglassFigure: She's one of few high school age character on the show to have a "womanly" kind of body, especially compared to the more angular and sharp-edged Candace (as their ClothingSwitch in "Hail Doofania" made incredibly obvious) and Stacy.
* TheIntern: At the end of summer, [[spoiler:she gets an internship at the O.W.C.A]].
* KickTheDog: As mentioned above, in "Finding Mary [=McGuffin=]" when, at near the end of the episode, Candance and Vanessa began fighting over the Mary McGuffin doll. It flies into the hands off a little girl and both look at it for a moment, seeing how much she liked it. Candace decided to let it go, Vanessa just took it.
--> '''Doofenshmirtz:''' So you just took it from a little girl and left her there crying? Wow, that ''is'' evil. Honey, I'm so proud of you! [[EvilFeelsGood It felt good,]] didn't it? Yeah, we can build on this.
* LethalChef: Apparently, even her adoring father can't stomach her baking.
* MadScientistsBeautifulDaughter: She plays with this trope in different ways. In early episodes she was outright disdainful towards her father and his experiments, generally playing the role of DeadpanSnarker. She [[CharacterDevelopment warmed up to him in later episodes]], though she remains somewhat annoyed by his exploits and his attempts to make her into a DaddysLittleVillain (though some of her actions hint she may head down that path anyway). She's also notably uncloistered (she only spends [[VisitByDivorcedDad alternate weekends]] with her father anyway) and keeps her relationship with [[AnimalSuperhero his]] [[EverythingsBetterWithPlatypi nemesis]] friendly but strictly platonic.
** {{Played Straight}}er in recent episodes, when she has developed an interest in Major Monogram's son, (human) secret agent Monty Monogram. However, their first date actually devolved into a fight when Monty made a comment about her father, so the betrayal part probably isn't going to happen.
* MoralityPet: To her dad Doofenshmirtz.
* MsFanservice: She's the only female non-adult character in the show with serious curves and her outfit hugs them tightly. And speaking of "I'm Me" up above check out the hip action.
* OddFriendship: Sometimes with Candace. A lot of their relationship is unknown so far, and although they don't meet up with each other often they have become friends.
* OfficialCouple:
** Revealed in 'Brain Drain' that she's going out with Johnny, then subverted in "Minor Monogram" when she breaks up with him and develops an interest in Monty.
** WordOfGod says she'll probably get together with [[spoiler: Ferb]] one day when they're older, though. [[spoiler:It seems she's been dating Ferb for a while in "Act Your Age".]]
* OutOfFocus: Not as much in regular episodes, but she doesn't appear at all in the Christmas special, "Mission Marvel", and "Save Summer" and has a fairly minor role in "Phineas and Ferb Star Wars". She also doesn't make an appearance in the movie, though she and her alternate universe counterpart ''were'' [[WhatCouldHaveBeen originally planned]] to have each had a brief scene.
* PerkyGoth: ...whenever her dad's not around to embarrass her.
** Actually addressed in one episode, where Vanessa informed her father that she and her friends were [[InsistentTerminology "Punks, not Goths."]] Although he'd actually been further off than that and thought it had something to do with Visigoths.
* PerpetualFrowner: To the point where Doofenshmirtz thinks there's something wrong when he sees her smiling in "My Sweet Ride".
* PetTheDog: In "A Real Boy", she gives her [=MP3=] to Norm at the end to cheer him up, and humors him in his statement of her being his "sister".
* ShowSomeLeg: Her Vampire Queen costume.
* SingleWomanSeeksGoodMan: After having enough of dating [[AllGirlsWantBadBoys bad boys]], Vanessa decided to date "good guys".
* SirNotAppearingInThisTrailer: A movie variant. She and her second dimension counterpart were going to appear in the movie, but were cut.
%%* TheSouthpaw
* StatuesqueStunner: Vanessa is the same height as Candace, 5'8.
* TallDarkAndSnarky: Tall? Check. Snarker? Check. Dark? Check.
* TheUglyGuysHotDaughter: To her dad Doof.
* WackyParentSeriousChild: She is very mature compared at her MadScientist dad, Dr. Doofenshmirz.
* WhyCouldntYouBeDifferent: {{Zig Zagged}} in 'A Real Boy', Doofenshmirtz [[FreudianSlip accidentally lets slip to her]] that he would have preferred having a son but reversed via ExactEavesDropping, as Doofenshmirtz was deriding his rival, Rodney, for such notions. Finally averted altogether as Vanessa was wearing headphones and couldn't hear a word Doof was saying to begin with.

[[folder:Suzy Johnson]]
[[caption-width-right:320:This is a Face of Evil, [[VideoGame/TheLegendOfZeldaCdiGames which you must conquer]].]]
->''"I am, and always will be Jeremy's favorite girl!"''
-> '''Voiced by:''' Creator/KariWahlgren

Jeremy's little sister. Despite her [[ChildrenAreInnocent cutesy demeanor]], she's quite manipulative, and fiercely jealous of any girl trying to get Jeremy's attention.
* BeneathTheMask: [[ChildrenAreInnocent She pretends to be a dumb innocent girl]], but in reality she is very smart, and cruel to whoever threatens her relationship with Jeremy.
* BigBrotherAttraction: Although it lacks any sexual qualities, she still wants Jeremy all to herself. And it's still very creepy.
* ChildProdigy: Far more knowledgeable and articulate than her age would suggest, though she hides this from most people.
%%* ClingyJealousGirl: To Jeremy.
* CreepyChild: Though only Candace and Buford recognize her as one.
* DeliberatelyCuteChild: She acts sweet and innocent in the eyes of her brother, but when she crosses paths with his girlfriend, Candace, she shows her TrueColors when Jeremy isn't looking.
* DevilInPlainSight: Candace and Buford are the only ones aware that she is evil, and she does a good job at hiding it.
* EnemyMine: Sort of, Candace once has to babysit her and the two of them wind up teaming up to try and get Phineas and Ferb to bust themselves.
* EnfantTerrible: Is apparently the most horrible thing in the world to Buford, the local bully, who all the other kids fear.
* {{Expy}}: Probably, of [[WesternAnimation/CatsDontDance Darla Dimple.]] She not only looks like her, but she has a very similar personality.
%%* FourTemperamentEnsemble: Choleric.
* AGirlAndHerX: Parodied with "That's The Norm" in the episode "Ferb TV"
* KarmaHoudiniWarranty: In her earlier appearances she never received any comeuppance for tormenting Candace, but "Comet Kermillian" and several episodes in Season 3 had several of her schemes backfire on her. For example, in "Let's Bounce" she is hit with Doofenshmirtz's [[BrutalHonesty Tell-The-Truth-iator]], making her confess to deliberately making Candace looking bad all morning. This caused her parents to scold her for it.
* ManipulativeBitch: She loves to manipulate people, from Candace to Jeremy to (alongside Candace) Phineas and Ferb.
** "Suddenly Suzy" seems to indicate that she believes all sisters should be this toward their brothers, given how appalled she acts upon finding out that Candace is not.
* ObfuscatingStupidity: Part of her acting.
* PingPongNaivete: In most of the episodes which feature her, she's frighteningly intelligent, manipulative, and (in a way) mature. Then, in ''Nerds of a Feather,'' she gets frightened by an ''Franchise/{{Alien}}''-esque exhibit and seeks a hug from a cuddly costumed character from her favorite cartoon. This could be an attempt to uphold to the the show's proclamation of "no mean characters" by reminding us she's still a child.
* PunchClockVillain: When Suzy doesn't have the opportunity to embarrass Candace in front of Jeremy, she's acting civil towards her. She even uses the phrase "I'm off the clock".
* {{Yandere}}: Take that BigBrotherAttraction and make it creepy and you have Suzy in a nut shell.

[[folder:Monty Monogram]]
[[caption-width-right:245:The unibrow just works on him.]]
->''"I hope to follow in my father's footsteps and join you in the battle against evil."''
-> Voiced by: Creator/SethGreen

Major Monogram's son who recently graduated from the High School Without A Cool Acronym, and now wants to fight evil like his father.
* TheAce: Displayed a [[ComicBook/{{Nightwing}} Nightwing]]-level combination of skilled acrobatics and combat skills in his debut appearance.
* AlliterativeName: Both his first and last name begin with a "M".
* BigOlUnibrow: Like his father.
%%* ChekhovsSkill: Acrobatics.
* DatingCatwoman: With Vanessa Doofenshmirtz.
* FedoraOfAsskicking: Wears one on his first official mission, during "Save Summer"
* FollowInMyFootsteps: Inverted. His father tries so hard to make it clear Monty ''doesn't'' have to do this, that he inadvertently pushes Monty toward being an acrobat instead, despite the fact that Monty is completely on board with fighting evil.
%%* FourTemperamentEnsemble: Phlegmatic
* IKnowMaddenKombat: Beats up Rodrigo with acrobatics.
* OnlySaneMan: Compared with his father and Carl. When Perry gets in trouble on a mission, he's the only one who notices.
* RememberTheNewGuy: Despite being Major Monogram's son and acquainted with Perry, he is not introduced until Season 3. This is explained by him having been in high school until recently.
* RomanticFalseLead: [[spoiler:According with "Act Your Age", Vanessa eventually ends up with Ferb in the future.]]
%%* ShipTease: With Vanessa.
* StarCrossedLovers: With Vanessa starting from "Sipping with the Enemy."
* StrongFamilyResemblance: Give him white hair and a mustache and he'd look just like his father.
* WackyParentSeriousChild: He seems to be more grounded than Monogram, not unlike how Vanessa is to her dad.

[[folder:Albert Du Bois]]
->''"They call me... the Truth Detector!"''
-> Voiced by: Diedrich Bader

Irving's older brother, with whom he often butts heads.

* AllThereInTheScript: His last name.
* BigBrotherBully: Often mean to Irving, even physically abusing him at times.
* {{Catchphrase}}: "As it should... a-be."
* ExpressiveMask: His glasses, DependingOnTheArtist.
%%* FourTemperamentEnsemble: Choleric
* JerkWithAHeartOfGold: Despite being a BigBrotherBully, "Nerds of a Feather" shows that there are times when he gets along with his brother.
%%* {{Nerd}}
* SmallNameBigEgo: He calls himself "The Truth Detector", but is easily fooled in "Not Phineas and Ferb".

[[folder:Jenny Brown]]
[[caption-width-right:250:She loves world peace, dogs, and pigeons.]]
->''"Save the pigeons!"''
-> Voiced by: Alyson Stoner

A hippy-dippy friend of Candace's who shows up on occasion. WordOfGod has [[http://phineasandferb.wikia.com/wiki/User:Marekos1996/Dan_Povenmire_Correspondence said]] that she is Django's sister. Like Django, she has suffered from being OutOfFocus on the show.
* ActionGirl: Parodied in "Phineas and Ferb Busters", when Candace makes her and Stacy go through some physically taxing exercises so they can assist her in busting Phineas and Ferb. In a straighter example, she helps fight off the Norm Bot invasion in the movie.
* DemotedToExtra: After Season 1, Jenny rarely appears on the show and just as cameo.
* FlatCharacter: Besides her being a GranolaGirl, we not know more about her.
* FlowerInHerHair: Jenny has long, brown hair which is decorated by a white daisy.
%%* FourTemperamentEnsemble: Melancholic
* GranolaGirl: With a history of participating in various protests along with an inherent desire for world peace, she can be characterized by her hippie-like nature.
* RapunzelHair: Probably comes with being a [[GranolaGirl hippie]].
* SoapboxSadie: Has a history of participating in various protests.
* {{Tuckerization}}: Named after Swampy's daughter.
* TheVoiceless: Hasn't spoken since season 2. Likely because of the policy that voice actors must be paid more once a show reaches season 3 and they don't want to pay Alyson Stoner for two roles.

[[folder:Django Brown]]
[[caption-width-right:320: Kids, DontTryThisAtHome! He's a professional and also a cartoon character.]]
->''"I made this for my Dad, but it hardly compares to his stuff."''
->Voiced by: Alec Holden (Season 1), Alex Garrett (Season 4)

A friend of Phineas and Ferb's. His father is an installation artist, and some of his father's love of the arts seems to have rubbed off on him. Other than that, there's not much to say about him, which is probably why he's not seen much in later episodes.
* ChuckCunninghamSyndrome: Django was featured prominently in four early episodes, and was even a member of Phineas and Ferb's close-knit group of friends. After "Oil on Candace" he disappeared from the main cast, and has been seen only in a handful of non-speaking cameos.
* DayInTheLimelight: "Oil on Candace".
* DemotedToExtra: Originally appeared in 2 episodes as one of the boys' friends, now generally absent.
* ItRunsInTheFamily: His artistic talent.
* RubberMan: Averted in "Jerk De Soleil", where he claims to able to put his foot behind his head.
* {{Tuckerization}}: Named after Swampy's son.
* WellDoneSonGuy: Wants to create a giant work of art to impress his father. Unfortunately, when Phineas and Ferb help him make one, it washes away before his father can see it. However, his father does see his regular-sized artwork and is more than appreciative of it.

[[folder:Mandy, Thaddeus, and Thor]]
[[caption-width-right:350:Meeting the neighbors.]]
->'''Mandy:''' ''"In terms of obnoxiousness, I'm sure my brothers have your brothers beat."''
->'''Thaddeus:''' ''"Well, Thor, I know who we're gonna outdo today!"''

-> Voiced by: Aliki Theofilopoulos (Mandy), Danny Cooksey (Thaddeus)

Niece and nephews of the Ferb-Fletchers' next-door neighbor Mrs. Weaver.
* AnnoyingYoungerSibling: Like Candace, Mandy considers her brothers' projects to be annoying. Unlike Phineas and Ferb, however, Thaddeus and Thor really are {{Jerkass}}es.
* [[ChildProdigy Child Prodigies]]: Nowhere ''near'' Phineas and Ferb's level, but Thaddeus and Thor still have above-average construction skills.
* CreatorCameo: Mandy is voiced by storyboarder Aliki Theofilopoulos.
* EvilCounterpart: While Thaddeus and Thor aren't ''evil'' per se, they're certainly bigger {{Jerkass}}es, a sharp contrast against [[NiceGuy Phineas and Ferb.]]
* {{Gadgeteer Genius}}es: Not as much as Phineas and Ferb, but enough to qualify.
* GagNose: Thaddeus has the same head shape as Phineas.
* IThinkYouBrokeHim: Mandy says "I think you broke their brains!" when Thaddeus and Thor are stunned stupid by Phineas and Ferb's fort.
* {{Jerkass}}: Thaddeus behaves condescendingly to everyone he speaks to.
* OvershadowedByAwesome: The reason they lose against Phineas and Ferb is because they're limited by physics and logic.
* TheQuietOne: We never hear Thor speak.
* {{The Rival}}s: Set up as these for the Flynn-Fletcher kids in their debut. However, [[NiceGuy Phineas and Ferb]] do not reciprocate, only competing with their counterparts after being requested to do so by Candace. On Candace and Mandy's side of things, Mandy admits that Phineas and Ferb are more skilled than her brothers after seeing what they are capable of, and her subsequent interactions with Candace have been friendly.
* TheSilentBob: Fittingly for Ferb's EvilCounterpart, Thor has not said a word on screen.
* SilentPartner: Thor.
* SmallNameBigEgo: Thaddeus and Thor's inventions don't hold a candle to Phineas and Ferb's, but you wouldn't know that by looking at their ego. The main problem seems to be that they can only achieve ''possible'' things, while P&F have no such constraints.
* VillainousBSOD: Upon seeing Phineas and Ferb's fort.