- Adorkable: Not entirely the stereotypical dork, but she has a large brain capacity, which she fills with very advanced subjects such as physics and calculus, she finds homework and extra credit assignments fun, is the youngest person ever inducted into Mensa and has long blonde hair, and a Stalker with a Crush although it's just Angus.
- Adorably Precocious Child
- Anti-Hero: More so in season 3.
- Awkward Kiss: She gets one from Fletcher at the end of unwANTed.
- Catch Phrase: "What the heck?!" and "Interesting factoid" (and, to a degree, "Hollah!").
- Season 3 introduces "Zazzow!".
- Cunning Linguist
- Cute but Cacophonic: Olive speaks relatively loudly and with an overdone accent of sorts.
- The Cutie
- Ditzy Genius: While very book smart due to having super memory, she has very childish moments, such as believing Cameron's ghost story, having way more fun while the rest of the ANTs are playing musical chairs, and her overall naivete. At least somewhat justified in that the character is only 12 at the beginning of the series. Maturity comes with experience.
- Dumb Blonde: Subverted since she has the greatest mental capacity on the show, she rarely puts it to good use, as a result, she sometimes ends up looking dumb and childish at times. She begins to play with this trope in "intelligANT".
- Expy: Of Lilly Truscott and Sam Puckett.
- Fangirl: Of Professor Marcy McLaughlin.
- Flanderization: She went from a mere cloudcuckoolander in the first season to a full-blown jerkass later on.
- Gamer Chick
- Genki Girl
- Heterosexual Life-Partners: With Chyna.
- Innocently Insensitive
- Innocent Prodigy
- Insufferable Genius: Mostly to Fletcher.
- Jerkass: In her case though, her over-analytical mind seems to give her a Lack of Empathy, plus she's a Cloudcuckoolander. Most of her moments are directed at Fletcher.
- Large Ham
- Little Miss Snarker
- Motor Mouth
- No Indoor Voice: Mostly in the first season, but it still shows up at times.
- Photographic Memory: Her talent, and what landed her in the A.N.T. Farm to begin with.
- Rapunzel Hair
- Teen Genius
- Token Evil Teammate: She's been developing into one in season 3, even to the point of being worse than Lexi.
- Took a Level in Jerkass: From Season 2 onward Olive becomes bossier, more self-centred, and enjoys other people's pain (and doesn't hesitate to inflict pain on others either). In Season 3, it came to a point in one episode where she ended up being worse than Lexi.
- Abusive Parents: Implied in several instances.
- Book Dumb: Yet this did not prevent him from being in the ANT program
- Born Unlucky: He's the Butt Monkey. Plus, his parents don't seem very supportive of his artistic ability.
- Butt Monkey
- Cosmic Plaything: Evolves into this later on. If anyone is going to be hit, teased, thrown, slapped, yelled at, or receive dirty looks it'll be Fletcher.
- The Chew Toy: It's safe to say that Fletcher is the unluckiest ANT.
- Deadpan Snarker: He has his moments.
- He could easily be the snarkiest character on the show but his ditziness keeps him in check.
- The Dog Bites Back: Despite his status as the Butt Monkey, Fletcher proves in "feature presANTation" that he does have limits to how much he will endure. In the episode, Fletcher hasn't been able to sleep for days because Angus keeps having nightmares waking him up. He spends the episode helping him with this problem, while Angus acts like a total jerkass towards him. After his final plan to help him ends with them simulating being on a boat, causing Fletcher to still be awake and even fall in a bowl of fish, he finally snaps and, in a particularly impressive and gratifying moment, he not only stands up to Angus, but actually chases him around the school, leaving Angus able to do nothing but run and scream in terror.
- Dogged Nice Guy: To Chyna.
- Expy: Of Freddie Benson, complete with being the Butt Monkey (but more worse than Freddie's). Though their personalities differ, as well as liking a specific subject (Freddie's Tech knowledge to Fletcher's Art).
- Flanderization: His Butt Monkey status is so exaggerated by Season 3 that you're more likely to see him getting hurt and insulted than actually, well, making art.
- Genius Ditz: Fletcher's great at art, but thinks snow angels are dead snowmen.
- Genre Savvy
- Horrible Judge of Character: At times, he ended up going along with the plans of villains, even when they admit their villainy. For example, he blindly agrees to paint Principal Skidmore even though she admitted to his face that she just uses the A.N.T. Farm as a sweatshop. Another example is when Lexi has Fletcher be the fall guy, so that she wouldn't get in trouble.
- Keet: "Hey Lexi, it's Fletcher from school!"
- Kid-anova: Kinda.
- Little Boy Seeks Big Girl: Fletcher occasionally tends to forget about Chyna when he's around Paisley, especially whenever Paisley hugs Fletcher. One such example (from the pilot no less) happens to be the pictured example on said Tropes page. So far it happened twice in the show, but he implied about Paisley on "chANTs of a lifetime" when he said he's moving to his 2nd best choice (since Chyna is gone).
- Does this again with Kennedy, and has a relationship with her, but it turned out to be a facade.
- Stalker with a Crush: To Chyna.
- Took a Level in Dumbass: Definitely lost more than a few IQ points from late Season 2 onward.
Olive: "With no rules I feel like I'm slowly dying."
Fletcher: "Technically we're all slowly dying, I believe it's called aging."
- Wacky Guy: Sometimes.
- 0% Approval Rating: In the entire country as revealed in Secret AgANT.Probably made up, though.
- Alpha Bitch: Although she developed into a Lovable Alpha Bitch later on.
- Attention Whore: To amazing levels.
- Big Bad Ensemble: With Principal Skidmore, somewhat.
- Blondes Are Evil: Downplayed. Not evil, but certainly mean and manipulative.
- Card-Carrying Villain
- Catch Phrase: "Shut up, Paisley!" and "You have got to be kidding me!"
- Characterization Marches On: Becomes more of a comedic frenemy to the ANTs as the show progresses instead of a straight-up villain.
- The Cheerleader
- Diminishing Villain Threat: Though she was initially designated as the main antagonist, that gets usurped by Principal Skidmore overtime.
- Freudian Excuse: "america needs talANT" tells us that the reason Lexi makes fun of Chyna is because she's secretly worried that she isn't as good as Chyna.
- Season 3 also shows that she's something of an insecure closet geek, which actually explains a lot.
- Good with Numbers: How she gets into the ANT Program.
- Guilty Pleasure: Lexi had two of these: First for the Stinkles movie, and later for Glarcon, after taking a glance at the comic book.
- Heterosexual Life-Partners: With Paisley.
- Hidden Depths: The Season 3 premiere reveals that she is a math genius.
- Hypocrite: Usually. Season 3 brought more light into this, as she always said she hates the ANTs, but turned out to be a math prodigy. Actually, both of the above makes her more of a Closet Geek who tormented the ANTs relentlessly because she IS one, and doesn't want others to know, so they wouldn't treat her the same way.
- It's All About Me
- Light Feminine and Dark Feminine: The dark to Paisley's light.
- Lovable Alpha Bitch: In later episodes.
- Manipulative Bitch: In spades.
- Narcissist: She is always looking at herself in the mirror.
- Odd Friendship: With Cameron.
- She's also the character that's closest to Zoltan (other than his secretary, but even he's more chummy with Lexi than her).
- Screw Yourself: G-rated version of this at the end of "idANTity crisis".
- Ship Tease: With Cameron.
- Sitcom Arch-Nemesis: To Chyna.
Portrayed by: Carlon Jeffery
Portrayed by: Aedin Mincks
Portrayed by: Allie DeBerry
Portrayed by: Mindy Sterling
- 0% Approval Rating: All the students hate her.
- Alliterative Name
- Authority Equals Asskicking: She was placed in a room with a live bear, but she singlehandedly defeated it!
- Big Bad Ensemble: With Lexi Reed. Well, not anymore as of Season 3.
- Dean Bitterman: Fits the role of the mean principal really well.
- Evil Redhead: She's one of the main antagonists.
- Jerk with a Heart of Gold: Only on occasion.
- Nice Job Fixing It, Villain: In the Season 3 Premiere, she made the school run down, hoping a billionaire inventor would fund the school for her own needs, but instead, he decided to make his own ANT boarding school and takes the ANTs under his wing, thus freeing the ANTs from Skidmore's tyranny.
- Small Name, Big Ego: She thinks to be young and beautiful, to the point where she cannot believe her own reflection is her.
Portrayed by: Finesse Mitchell
Portrayed by: Zach Steel
Wacky The Wolf
Portrayed by: Christian Campos
- The Voiceless: Wacky the Wolf never speaks and when Lexi impersonates Wacky, talking nearly blows her cover.
Portrayed by: Claire Engler
Portrayed by: Dominic Burgess
Portrayed by: Tom T. Choi
Portrayed by: Zibby Allen
Kennedy Van Buren/Kumiko Hashimoto
- The Dragon/The Mole: She eventually proved to be Hashimoto's daughter, although she came to care for most of the ANTS.
- Status Quo Is God: The events of "finANTial crisis" (in which her true identity is revealed) are essentially ignored in "meANT to be?".