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!!The ants

-->'''Voiced by:''' Dave Foley

* {{Adorkable}}: Either when it comes to his inventions or talking to Princess Atta.
* AllOfTheOtherReindeer: He is regularly marginalized for wasting his time on creative thinking and inventing instead of gathering food for the Offering. What makes this more understandable than usual for this trope is that he is very much TheKlutz and causes often more harm than good with his blunders. This is deconstructed because the others' criticism of his acts blind them to the facts that he is actually right about.
* BadassBookworm: [[spoiler:Becomes this during his stand against Hopper.]]
* BunglingInventor: It's not really his inventions that don't work, but his clumsiness.
* CharacterDevelopment: Goes from being the misfit of the colony to the hero of the film.
* {{Determinator}}: Wants to gain his colony's approval so darn badly.
* DoggedNiceGuy: For Princess Atta.
* HeroicBSOD: After he gets exiled from the colony. He gets better with help from Dot and the circus bugs.
* IncorruptiblePurePureness: Flik never shies away from what's right.
* IntergenerationalFriendship: With Dot, mainly because she's the only ant in the colony who admires and looks up to Flik.
* TheMillstone: Was this for most of the film until he TookALevelInBadass.
* NiceGuy: Goes with being played by Dave Foley.
* OfficialCouple: He eventually begins a relationship with Atta.
* TookALevelInBadass: [[spoiler:Despite suffering a NoHoldsBarredBeatdown from Thumper under Hopper's orders, he gives Hopper a WorldOfCardboardSpeech and TheReasonYouSuckSpeech and inspires the rest of the colony to stand up to the grasshoppers.]]
* UnwittingInstigatorOfDoom: He accidentally collapses the offering stone holding all of the food meant for the grasshoppers, prompting Hopper to demand ''twice'' the amount intended which leaves the island facing starvation. Thankfully, Flik is not about to let them suffer that fate.
* WideEyedIdealist: Doesn't once stop thinking that the Ants can have a better life.

-->'''Voiced by:''' Creator/JuliaLouisDreyfus

* DefrostingIceQueen: She is rather dismissive towards Flik and his ideas on improving the harvest in the beginning of the film. But warms up to him in the middle.
* DisappearedDad: Her and Dot's birth father was never seen.
** Based on science, after mating, the supposed "King Ant" dies.
* EverythingsBetterWithPrincesses: She may be neurotic, but she does care for her colony.
* HartmanHips: For an ant, Atta has pronounced hips.
* NonMammalMammaries: A rather subdued example, but you can tell she's an adult female ant.
* NotSoDifferent: Her and the ant colony, according to Flik.
* OfficialCouple: With Flik.
* RoyalsWhoActuallyDoSomething: Once Flik has the idea to get rid of Hopper, she's all the way on board. And after that [[spoiler:she ''finally'' stands up to Hopper.]]
* SingleWomanSeeksGoodMan: While Atta was at first dismissive towards [[NiceGuy Flik]] she wasn't as brutal as the rest, and it was somewhat justified given their colony's current predicament and that his inventions ''did'' cause problems. After he and the Circus Bugs saved her sister from death, Atta started to develop an instant liking towards Flik, even showing her own {{adorkable}} when with him. It was only after she and the colony found out about his lies did she exile him. She changes her attitude again when [[spoiler:Flik and the other ants drive the grasshoppers out]].
* SlapstickKnowsNoGender: She gets knocked to the ground twice by catapulted stalks of grain (thanks to [[BunglingInventor Flik]]) and even falls off the counsel stand in the HilariousOuttakes.
* SoProudOfYou: Said word-for-word after [[spoiler:Flik inspires the ant colony to ZergRush the grasshoppers]].

-->'''Voiced by:''' Hayden Panettiere

* TheCutie: An ant version this time.
* DisappearedDad: Her and Atta's birth father was never seen or mentioned.
** As mentioned above, based on science, after mating, the supposed "King Ant" dies.
* EleventhHourSuperpower: "Come on, wings. Fly, fly!"
* IntergenerationalFriendship: With Flik.
* KidAppealCharacter: The only child aged main character.
* LiteralMinded: She can't make sense of Flik's seed story that's meant to encourage her as he uses a rock to represent the "seed" in question. She finally comes to appreciate what he meant and uses this to convince Flik to return home.
* PluckyGirl: Shown to be incredibly determined, which allows her to fly.
* RidiculouslyCuteCritter: She looks as adorable as a cartoon ant can.
* RoyalsWhoActuallyDoSomething: See her SpannerInTheWorks section.
* SpannerInTheWorks: She overheard the grasshoppers' plan to [[spoiler:squish the queen]] and flew back to the circus wagon to get Flik and company to return to save the colony.
* TokenGoodTeammate: One of the only members of the ant colony who respects Flik, despite his accidents.
* YouthfulFreckles: The only ant to have this that also showcases her ''youthfulness''.

!!The grasshoppers

-->'''Voiced by:''' Creator/KevinSpacey

* AxCrazy: It's unbearably obvious that he's incredibly mentally unstable, and when his VillainousBreakdown hits he goes completely insane.
* BadBoss: As Molt tells the ants during the raid in the film's second half: "You don't want to make him mad. ''Believe me!''" He takes out his frustration at his brother by punching out another member of his gang because of a promise to his mother. Later, he matter-of-factly ''kills'' several of his fellow grasshoppers just to demonstrate a point in an argument.
%%* BarbaricBully
* BigBad: The main antagonist of the film, Hopper is the leader of the grasshoppers and without him the others wouldn't even care.
* BlackComedyBurst: Hopper indulges in this whenever he remotely PlayedForLaughs, such as squashing some of his own men with a completely bored look on his face or [[spoiler: his rather undignified death, eaten by a bunch of baby birds while screaming like a little girl]].
* TheBully: He loves picking on weaker species to make himself feel big.
* BullyingADragon: A Reconstructed variation. He understands the weakness of his position against the numerically superior ants, and engages in a campaign of terror specifically to keep the ants from wising up and fighting back. This backfired as it only meant the ants snapped after too much abuse, much to his confusion:
-->'''Hopper:''' ''*as his men retreat*'' Where are you going? ''They're just ants!!!''
* DeadpanSnarker: He is voiced by Kevin Spacey, after all. Throughout the film, he makes dry remarks about anything that annoys him.
* DeathByDisfigurement: [[spoiler:Loses an antenna shortly before being eaten]].
* EatenAlive: At the end of ''A Bug's Life'', [[spoiler:Hopper gets eaten by the bird's chicks]].
* EvenBadMenLoveTheirMamas: He says that promising his mother on her deathbed not to kill Molt is the only reason he has not done so.
* EvilIsPetty: When his big elaborate plan fails, he settles for mercilessly beating up Flik and trying to kill him. In fact, his only reason for going back was to browbeat them because of one ant who was no apparent threat and only hurt his pride.
* FatalFlaw: His overconfidence and underestimating the ants' strength eventually leads to his death.
* FauxAffablyEvil: He becomes chillingly polite when about to do something like murdering his own henchmen or preparing to feed children to deranged grasshoppers.
* ForTheEvulz: Unlike other Pixar villains, Hopper has no known "reason" behind his twisted acts. He himself even points out that grasshoppers have enough food to last through the winter without extorting any from the ants.
* GeniusBruiser: He can easily beat down most anybody else in the film, and he's hardly dumb; he knows that if all the ants stood up to the grasshoppers, since they're far more numerous, the ants would easily push them away. [[spoiler: And indeed it does happen, they just needed a push.]]
* HairTriggerTemper: It is ''NOT'' a wise idea to make him angry.
* ItsAllAboutMe: Everything is about him being in control of ''everyone'' else.
* ItsPersonal: The obvious reason he orders the ants to double the food rations is due to his injured pride from Flik standing up to him.
* JerkWithAHeartOfJerk: He gives the impression of being more than a bully when he announces to his men that they're going to spend the rest of the winter partying instead of returning to the ants' island. Then he kills some of his men to make a point.
* KarmicDeath: He gets his JustDesserts when he becomes the meal of some hungry bird chicks. For extra points as he is a villain obsessed with intimidation, he is ''terrified'' of birds.
* KickTheDog:. One example is him belittling Atta after "the grasshoppers" meal is gone.
* LargeHam: A dramatic voice and emphasizing gestures are helpful for a skilled orator.
* MeanCharacterNiceActor: In the HilariousOuttakes, he's a fairly sensitive guy that puts up with a lot of goof ups and teasing from the rest of the cast.
* ObviouslyEvil: Domineering presence, strongest of his group, enjoys making people suffer.
* PerpetualFrowner: There is rarely a scene where he cracks a smile.
* PetTheDog: Though the ants had messed up badly in giving his grasshoppers food, he's ultimately willing to give the ants another chance, though he makes the ants double the amount of food they would have given him to compensate.
* RedRightHand: Hopper has a scar over his right eye.
* {{Sadist}}: A ruthless tyrant who delights in the fear he instills in the ants, and was fully prepared to publically execute their queen to keep them compliant. He even admits to his minions that they don't even need the food the ants provide, implying his actions are motivated purely by sadism.
* ScarsAreForever: One over his (also likely blind) right eye, which [[WordOfGod the Pixar staff]] confirms was inflicted by the [[spoiler:first]] bird that attacked him.
* ScreamsLikeALittleGirl: [[spoiler: When confronted by his greatest fear, birds. In fairness when they're big enough to eat you alive, you probably would too.]]
* SelfFulfillingProphecy: He is savvy enough to fear the ants' numbers and their ability to bite back at any time, but his own method of avoiding this; abusing and intimidating them to increasing measures, is ultimately what causes the ants to snap and turn on the grasshoppers.
* SmugSnake: He's smart and utterly convinced of his superiority but has no idea how to deal with the unexpected.
* TheSociopath: Manipulative, ruthless, cold hearted, sadistic, remorseless, pompous, arrogant, evil... yes, he's clearly one.
* SoftSpokenSadist: When not at borderline frothing rage point, he's committing brutality with a stoic, outright bored look on his face. How he makes his case towards [[WithAllDueRespect his men ditching going after the ants]] is a key example.
-->'''Hopper:''' ''*politely*'' Does anybody ''else'' wanna stay?...
* UndignifiedDeath: Terrifying though it was, [[spoiler:he still died by being eaten by [[KillerRabbit an adorably fluffy baby bird]].]]
* VileVillainSaccharineShow: One of the scariest villains Pixar has ever done is in a comedy about cute ants and insect clowns.
* VillainousBreakdown: [[spoiler:He goes through one first when he tries to kill Flik out of anger and speaks about gathering grasshoppers and returning when it is obvious that he lost and when he's about to be eaten by a bird and then he realizes the bird has hungry babies.]]
* WhyDidItHaveToBeSnakes: According to Atta, he was afraid of birds. [[spoiler: This is his eventual fate when he gets eaten in the end.]]
* WouldHurtAChild: Hopper doesn't hesitate to feed child Dot to [[AxCrazy Thumper]].

-->'''Voiced by:''' David Lander
* AscendedToCarnivorism: He tries to eat Dot multiple times.
* AxCrazy: Shown in full when [[spoiler:he mercilessly beats up Flik]].
* TheBrute: He's by far the most violent member of Hopper's swarm.
* FluffyTheTerrible: If you associate the name "Thumper" with a certain [[Disney/{{Bambi}} adorable bunny]], it's weird to see an AxCrazy grasshopper having the same name. On the other hand, it's also a MeaningfulName, as he likes to thump his enemies in the ground.
* KarmaHoudini: He gets scared away by Dim, but apparently survives.
* MadwomanInTheAttic: Well he's kept around, but often on a leash, blurring the line between thug and animal.
* MeanCharacterNiceActor: Actor!Thumper is rather polite, completely sane, and far from the AxCrazy character he is in the movie.
* PsychoForHire: A very low-functioning example but very psycho for treats nonetheless.
* SuddenlyVoiced: In the outtakes.
* TeamPet: Though it's ambiguous whether he's supposed to represent an attack dog or an ax-crazy human, he seems to be this to the grasshoppers to some degree. A blink-and-you'll-miss-it scene shows him begging Hopper for treats and catching a piece of grain tossed to him in his mouth.
* TheUnintelligible: Speaks in grunts, rasps, growls, snarls, and [[spoiler:whimpers (when Dim scares him away)]].

-->'''Voiced by:''' Richard Kind

* AffablyEvil: Nice and friendly, even trying to tell funny stories to ants he's menacing. He even gives them a friendly warning during the second raid, having himself made Hopper angry one too many times:
-->"Do as he says; you don't want to make him mad. ''Believe me!''"
* AnnoyingYoungerSibling: He infuriates Hopper to such an extent that Hopper had to promise their dying mother that he wouldn't kill Molt.
* CatchPhrase: "Shutting up", whenever he realizes he's pushing his luck.
* TheDitz: Molt isn't exactly the smartest bug in the movie.
* EvenEvilHasStandards: He's seen visibly flinching when Thumper attacks Flik.
* GentleGiant: He's a big guy and doesn't really want to pick on the ants.
* HeelFaceTurn: [[spoiler: He joins the circus bugs at the end of the film as a strongman.]]
* HiddenDepths: He knows just how foolish and evil Hopper's plan is but is scared to refuse to go.
* MeanCharacterNiceActor: Played with. Since Molt was already a MinionWithAnFInEvil in the movie, in the HilariousOuttakes he pretty much acts like his usual playful self, sans allegiance.
* MinionWithAnFInEvil: While he's one of the bad guys, he's a dim-witted GentleGiant, often infuriating his intelligent but evil older brother.
* MotorMouth: Loves to babble on and on. Helps that he's voiced by Richard Kind.
* PragmaticVillainy: While he's not necessarily cruel to the ants, his main compunction with mugging food from them is that it's an exhausting waste of time and effort when the grasshoppers already have loads of food. A lot of the other grasshoppers are implied to think the same, just like Molt, they don't want to cross [[BadBoss Hopper]] about it.
* PunchClockVillain: When the food's collected and the circus is performing, he happily claps and plays along, rather like a child.
-->"The circus, the circus, I love the circus!"
* TokenGoodTeammate: He's not really evil, just following along with the other grasshoppers.

!!The circus bugs

[[folder:P.T. Flea]]
-->'''Voiced by:''' Creator/JohnRatzenberger
* BadBoss: Aside from regularly berating his employees, a throwaway line suggests that he doesn't actually pay them either.
%%* BadassNormal
* {{Jerkass}}: Though he's not as mean as Hopper is.
* JerkWithAHeartOfGold: Despite his general nature, he ''does'' come around to help the ants rid themselves of Hopper, even offering Flik a place in his circus when they've reclaimed their home. When he sees Atta and Dot newly crowned, he is on the verge of tears before he shakes the sentiment off.
* NiceHat: Wears what appears to be a very small top hat.
* LetsGetDangerous: There's no denying that's he's a {{Jerkass}}, but he shows his courage by heroically attacking what he ''thought'' was a real bird to save everyone.
* RepulsiveRingmaster: He is the ringmaster of the circus bugs, and while not outright evil, he is the least heroic and most {{Jerkass}} out of them.
* SkewedPriorities: When he sees Manny "bleeding" to death during the fake bird attack.
-->'''P.T.:''' There goes my magic act!
* TheNapoleon: As a flea, he's tiny and mean.
* UnwittingInstigatorOfDoom:
** He's responsible for [[spoiler:the ants finding out the circus bugs aren't warriors, costing Flik his newly earned good name. He suddenly shows up demanding that his circus bugs return to work for him. This in turn causes the ants to give up on rebelling against Hopper, almost resulting in the villain's victory.]]
** He also [[spoiler:ruins the ants' original plan of scaring the grasshoppers off with a fake bird by setting said bird on fire, thinking it to be the real deal.]]

-->'''Voiced by:''' Creator/JoeRanft
* BigEater: How he mainly copes with not getting to be a beautiful butterfly.
* FatIdiot: A very fat and not very bright caterpillar.
* FunnyForeigner: He has a thick German accent.

-->'''Voiced by:''' Creator/DenisLeary

* BerserkButton: "SO! Being a ladybug automatically makes me a girl! Is that it, fly boy?! Huh?!"
%%* BrooklynRage
* DudeLooksLikeALady: Has a feminine appearance that routinely makes him a target for male bugs.
* GutturalGrowler: The contrast of appearance is complete with his raspy, definitely male voice.
* HeterosexualLifePartners: With Slim.
* JerkWithAHeartOfGold: He's easy to anger [[BerserkButton whenever you call him a lady]], and he's pretty short-tempered, but he's truly a helpful and talented ladybug and cares for his fellow circus bugs. Oh, and he loves children, too.
* RealMenWearPink: He has a tough personality and a deep, manly voice, but also a very feminine face.
* TertiarySexualCharacteristics: Parodied. ''He'' has long eyelashes, full lips and a {{beauty mark}}.
* VitriolicBestBuds: With Slim.

-->'''Voiced by:''' Creator/DavidHydePierce

* ButtMonkey: He's always used in his acts as a prop.
* DeadpanSnarker: Throughout the film, but especially when Francis uses him as a "sword".
-->''(completely deadpan)'' "Swish swish. Clang clang."
* EquippableAlly: He is often used as a circus prop, such as a sword.
* GrievousHarmWithABody: He is sometimes used as a weapon by the other bugs.
* HeterosexualLifePartners: With Francis.
* MeaningfulName: He's slender as a stick.
* PlayingATree: He is usually just used as a prop in his circus acts.
* VitriolicBestBuds: With Francis.
* YeOldeButcheredEnglish: Briefly, as the Robin Hood act starts to unravel...
--> "Me thinketh it-it's [[OhCrap not working!]]"

-->'''Voiced by:''' Bonnie Hunt

* PlatonicLifePartners: With Dim.
* FriendlyNeighborhoodSpider: She helps Flik and the Circus Bugs in their quest to save the colony from the Grasshoppers.
* TeamMom: She is a gentle creature who helps the Circus Bugs, and is quick to tend to Dim's wounds when he is hurt.

-->'''Voiced by:''' Creator/BradGarrett

* BigGuy: The biggest and strongest of the Circus Bugs.
* FriendToAllChildren: Dim even tried to [[spoiler:sneak some ant children away to the circus.]]
* GentleGiant: He's the BigGuy and [[FriendToAllChildren is nice to kids.]]
* ManChild: The most childish of the group.
* PlatonicLifePartners: With Rosie.
%%* ThirdPersonPerson
%%* YouNoTakeCandle

[[folder:Manny and Gypsy]]
-->'''Voiced by:''' Jonathan Harris and Madeline Kahn

%% * CoolOldGuy: Manny
* CloudCuckoolander: Gypsy seemed much more interested in her appearance than her husband walking into the walls.
%%* HappilyMarried
* InterspeciesRomance: A male praying mantis is married to a female butterfly.
%%* TheKlutz: Manny.
* LargeHam: What do you expect? It's [[Series/LostinSpace Dr. Smith]]!
* ALizardNamedLiz: Manny the mantis and Gypsy the gypsy moth.
%% * NonActionGuy: Manny again.
%% * StageMagician: Manny once again.
* UglyGuyHotWife: A beautiful gypsy moth married to an elderly praying mantis.

[[folder:Tuck and Roll]]
-->'''Voiced by:''' Mike [=McShane=]

* Catchphrase: "You're Fired!" becomes theirs after their boss actually ''does'' fire them.
* FunnyForeigner: Both are the comic relief characters and talk in a gibberish that is supposed to sound like Hungarian.
* KeepItForeign: They never learn a word of English, except... "[[CatchPhrase You fired]]!" WordOfGod says they're Hungarian, even though their gibberish sounds nothing like the actual language.
* ThoseTwoGuys: The only twins of the group.
* TheUnintelligible: Especially when they slip into Hungarian.


[[folder:The Bird]]
-->'''Voiced by:''' Randy Thom

* AlwaysABiggerFish: A gigantic predator (from the bugs' point of view) [[spoiler: who defeats the film's true villain Hopper in the end]].
* DeusExMachina: Shows up just in time [[spoiler: to kill Hopper before he can catch and kill Flik]].
* TheDreaded: Everyone is afraid of birds, even Hopper.
* FeatheredFiend: To the bugs. A human would probably find her rather cute.
* GiantFlyer: A mix of the "normal sized flyer seen from a small character's perspective" and "giant predator" varieties.
* {{Kaiju}}: What everybody sees her as.
* MonsterIsAMommy: The bugs are terrified of her, but she's just a mother bird looking to feed herself and her chicks.
* NonMaliciousMonster: She's only looking to eat and feed her young.