- Adorkable: Either when it comes to his inventions or talking to Princess Atta.
- All of the Other Reindeer: He is regularly ridiculed and insulted for wasting his time on creative thinking and inventing instead of gathering food for the Offering.
- Badass Bookworm: Becomes this during his stand against Hopper.
- Bungling Inventor: It's not really his inventions that don't work, but his clumsiness.
- Character Development: 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.
- Dogged Nice Guy: For Princess Atta.
- Heroic BSOD: After he gets banished from the colony. He gets better with help from Dot and the circus bugs.
- Incorruptible Pure Pureness: Flik never shies away from what's right.
- Intergenerational Friendship: With Dot, mainly because she's the only ant in the colony who admires and looks up to Flik.
- Love Interest/Official Couple: With Atta.
- Nice Guy: Goes with being played by Dave Foley.
- The Millstone: Was this for most of the film until he...
- Took a Level in Badass: Despite being given a No-Holds-Barred Beatdown from Thumper under Hopper's orders, he gives Hopper a "Reason You Suck" Speech and inspires the rest of the colony to stand up to the grasshoppers.
- Wide-Eyed Idealist: Doesn't once stop thinking that the Ants can have a better life.
- Defrosting Ice Queen: 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.
- Disappeared Dad: Her and Dot's birth father was never seen.
- Everything's Better with Princesses: She may be neurotic, but she does care for her colony.
- Hartman Hips: For an ant, Atta has pronounced hips.
- Love Interest/Official Couple: With Flik.
- Non-Mammal Mammaries: Arather subdued example, but you can tell she's an adult female ant.
- Not So Different: Her and the ant colony, according to Flik.
- Royals Who Actually Do Something: Once Flik has the idea to get rid of Hopper, she's all the way on board. And after that she finally stands up to Hopper.
- The Cutie: An ant version this time.
- Disappeared Dad: her and Atta's birth father was never seen or mentioned.
- Eleventh Hour Superpower: "Come on, wings. Fly, fly!"
- Intergenerational Friendship: With Flik.
- Kid-Appeal Character: The only child aged main character.
- Plucky Girl: Shown to be incredibly determined, which allows her to fly.
- Royals Who Actually Do Something: See her Spanner in the Works section.
- Spanner in the Works: She overheard the grasshoppers' plan to squish the queen and flew back to the circus wagon to get Flik and company to return to save the colony.
- Youthful Freckles: The only ant to have this that also showcases her youthfulness.
- Ax-Crazy: When he's in a bad mood.
- Bad Boss: 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.
- Big Bad: Hopper is the leader of the grasshoppers and without him the others wouldn't even care.
- The Bully: He's psychotic and loves picking on weaker species to make himself feel big.
- Dangerously Genre Savvy: For one, Hopper realizes the strength of the ants, and keeps them in fear enough to prevent an uprising. He also realizes the significance of one ant inspiring the rest. (and uses this to callously kill some of his followers) He also ends up seeing past the bird disguise. However, during the climax, another bird appears, and he thinks it's another trick. It's NOT.
- Deadpan Snarker: He is voiced by Kevin Spacey, after all. Throughout the film, he makes dry remarks about anything that annoys him.
- Even Bad Men Love Their Mamas: He says that promising mother on her deathbed not to kill Molt is the only reason he has not done so. This could, however, not really be a matter of loving his mother and instead be more of a matter of simply keeping a promise, especially seeing how it just makes him more dangerous, see Bad Boss above
- Evil Is Petty: 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 kill one ant who was no apparent threat and only hurt his pride.
- Faux Affably Evil: He becomes chillingly polite when about to do something like murdering his own henchmen or preparing to feed children to deranged grasshoppers.
- Freudian Excuse: Averted. Unlike other Pixar villains, Hopper has no known "reason" behind his twisted acts. He's just a bully, plain and simple. All in all, he's competing with Lotso from Toy Story 3 for Pixar's most evil villain.
- Genius Bruiser: 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. And indeed it does happen, they just needed a push.
- Jerkass: Just a wildly unpleasant individual all round.
- Jerk with a Heart of Jerk: 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.
- Kick the Dog: A number of times. One example is him belittling Atta after "the grasshoppers" meal is gone.
- Obviously Evil: Domineering presence, strongest of his group, enjoys making people suffer.
- Pragmatic Villainy: Zig-zagged: when some of the other grasshoppers point out to Hopper that they have enough food and an easy life without needing to exploit and oppress the ants for food, he kills them and tells the rest that they oppress the ants for its own sake, not for the food. However, Hopper's point is that the oppression is pragmatic if you take a longer view: while individual ants are no threat to the grasshoppers, the ants as a group outnumber the grasshoppers by hundreds to one. If the grasshoppers let up on the pressure at all, the ants may realize their own power, at which point the grasshoppers' leisurely lifestyle ends.
- Scars Are Forever: One over his (also likely blind) right eye, which Word of God confirms was inflicted by the first bird that attacked him.
- Smug Snake: Big time. He's smart and utterly convinced of his superiority but has no idea how to deal with the unexpected.
- The Sociopath: Perhaps the scariest villain Pixar has ever done.
- Villainous Breakdown: He goes through one when he's about to be eaten by a bird, and has another when he realizes the bird has hungry babies.
- Why Did It Have to Be Snakes?: According to Atta, he was afraid of birds. This is his eventual fate when he gets eaten in the end.
- Would Hurt a Child: Hopper doesn't hesistate in pretending to feed child Dot to Thumper.
- Ax-Crazy: Shown in full when he mercilessly beats up Flik.
- Suddenly Voiced: In the outtakes.
- Team Pet: 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.
- The Unintelligible: Speaks in grunts and rasps.
- Affably Evil: 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!"
- Annoying Younger Sibling: To Hopper.
- The Ditz: Molt isn't exactly the smartest bug in the movie.
- Gentle Giant: He's a big guy and doesn't really want to pick on the ants.
- Heel-Face Turn: Joins the circus bugs at the end of the film.
- Hidden Depths: He knows just how foolish and evil Hopper's plan is but is scared to refuse to go.
- Badass Normal
- Jerkass: Though he's not as mean as Hopper was.
- Nice Hat: Wears what appears to be a very small top hat.
- Let's Get Dangerous: 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.
- The Napoleon
- Unwitting Instigator of Doom:
- He's responsible for 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 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.
- Big Eater: How he mainly copes with not getting to be a beautiful butterfly.
- Fat Idiot
- Funny Foreigner: He has a thick German accent.
- Berserk Button: "SO! Being a ladybug automatically makes me a girl! Is that it, fly boy?! Huh?!"
- Dude Looks Like a Lady: Has a feminine appearance that routinely makes him a target for male bugs.
- Guttural Growler: The contrast with appearance is complete with his raspy, definitely male voice.
- Jerk with a Heart of Gold
- Real Men Wear Pink
- Tertiary Sexual Characteristics: Parodied. He has long eyelashes, full lips and a beauty mark.
- Butt Monkey: He's always used in his acts as a prop.
- Deadpan Snarker: Throughout the film, but especially Francis uses him as a "sword".(completely deadpan)"Swish swish. Clang clang."
- Grievous Harm with a Body
- You Are A Tree, Charlie Brown
- Platonic Life Partners: With Dim.
- Team Mom
- Woman in Black: Being a black widow spider, though she doesn't carry the usual characteristics.
- Big Guy: The biggest and strongest of the Circus Bugs.
- Friend to All Children: Dim even tried to sneak some ant children away to the circus.
- Gentle Giant: He's the Big Guy and is nice to kids.
- Man Child: The most childest of the group.
- Platonic Life Partners: With Rosie.
- Third-Person Person
- You No Take Candle
Manny and Gypsy
- Cool Old Guy: Manny
- Cloud Cuckoolander: Gypsy seemed much more interested in her appearance than her husband walking into the walls.
- Interspecies Romance: A male praying mantis and a female butterfly.
- The Klutz: Manny.
- Large Ham: What do you expect? It's Dr. Smith!
- May-December Romance: Gypsy certainly appears to be much younger than Manny.
- Non-Action Guy: Manny again.
- Stage Magician: Manny once again.
Tuck and Roll
- Bigger Bad: At first, although is ultimately the one to do Hopper in.
- Deus ex Machina
- The Dreaded: Everyone is afraid of birds, even Hopper.
- Kaiju: What everybody sees it as.
- Monster Is a Mommy: The bugs are terrified of her, but she's just a mother bird looking to feed herself and her chicks.
- Non-Malicious Monster: It's only looking to eat and feed its young.