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This is the character sheet for Odd Squad.

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    Agents in General 
https://static.tvtropes.org/pmwiki/pub/images/children_wearing_suits.jpg
The Main 7 across Season 1 and Season 2.
Not pictured: Agent Opal, Agent Omar, Agent Oswald and Agent Orla.
Members of Odd Squad, the organization founded to stop oddness. Every employee is a child.

  • Action Duo: The Investigation agents are teamed up.
  • Badass Adorable: They are very good at their jobs and are very precious.
  • Badass in a Nice Suit: Most Investigation and Management agents wear suits.
  • Bunny-Ears Lawyer: The characters are very quirky, yet all competent.
  • Chaotic Good: More than a bit weird in personality, organization, and techniques, but are definitely good people tying to stop odd and help others.
  • Crippling Overspecialization: While skilled at fighting oddness in the field, many Investigation agents have a lack of skill in other areas covered by different departments, such as Maintenance/Transportation and Science.
  • Hero of Another Story: While the only characters to really get focus on their cases are the main characters, episodes pop up here and there to show what the other agents work on.
  • Kid Detective: Well, they're all kids, and must do some detective work in order to stop oddness.
  • Little Miss Badass: Most female agents are this to some extent.
  • Grade-School C.E.O.: All precincts are run by a Director in the Management position. How young they are can range from infancy up to the age of 12.
  • Platonic Boy/Girl Heroes: Basically every set of partners that are the opposite gender.
  • Red Is Heroic: The main characters, the Investigation department, are associated with red.
  • Teen Superspy: Preteen, but close enough. They aren't exactly spies, but they are agents who solve mysteries/crimes.
  • Theme Naming: Every agent's name begins with the letter 'O'. The only exception ended up a villain after his Face–Heel Turn.
  • True Companions: They are pretty much all best friends and are always there for each other.
  • Workaholic: They are rarely ever seen not working.
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    Season One 

Agents

Agent Olive

Played by: Dalila Bela, Isabela Moner (pilot)
https://static.tvtropes.org/pmwiki/pub/images/dbela.jpg
A 12-year-old veteran agent of Odd Squad. She used to have another partner before she had Otto; it was unclear whom until "Training Day". Despite being no-nonsense, serious, and often full of snark, she has a soft, caring heart.

  • Absurd Phobia: She is not a fan of pies. This is justified, as she has a good reason. One OddTube episode reveals that she's attempting to get over the fear.
  • The Ace: She is exceptionally good at what she does to the point that she is idolized by other agents and is known among them for her work.
  • Adorkable: Can get this way when talking about sports, cleaning, or the Shmumberman comic book series.
  • Affection-Hating Kid: Zig-zagged. She doesn't take too kindly to Ms. O (or whom she thinks is Ms. O, anyway) pinching her cheeks in "The Briefcase", but is fine with giving people hugs and other forms of affection. Similarly, she also hates being called "cute" and other endearing terms.
  • Ambiguous Disorder: Olive shows quite a few symptoms of PTSD and trauma, which stems from her experiences in dealing with her old partner and fighting off the pienado that he released in her own workplace. When she is forced to interact with pie in any capacity, she screams in terror and often cowers behind Otto, and it's implied in a few episodes that she also has sensitive hearing. The OddTube episode "Interview with Olive" also has her explaining how she's getting over her fear of pie by focusing on tarts, a smaller pastry. Whether she was intentionally written to have PTSD or trauma symptoms is unknown.
  • Character Development: Throughout Season 1, Olive begins to loosen up and learns to not take things so seriously. She also begins healing from the trauma she experienced fighting off Odd Todd's pienado starting in Season 2.
  • Cloudcuckoolander's Minder: She often keeps the energetic Otto in line.
  • Does Not Like Spam: Dislikes pies. She has a very good reason.
    • Also hates the egg salad pizza combination that Delivery Debbie and Delivery Doug come up with, to the point that eating just one bite makes her feel nauseated.
  • Dreadful Musician: Averted. Albeit she doesn't get to sing much, Olive is quite the proficient vocalist.
  • Fangirl: She loves sports, Coach Roberts, Santa Claus, and Shmumberman. Her seriousness immediately drops whenever she interacts with them.
  • Gamer Chick: She slowly becomes one in "Game Time" through practice playing Robo-Blast-Bots at the Shmumbercade in order to rescue Otto.
  • Grade-School C.E.O.: Becomes this in the Season 1 finale alongside Otto. After the events of The Movie, she goes back to leading her precinct.
  • Hidden Depths:
    • She is a frequent patron of Club 24 and is quite friendly with Tony the Bouncer — quite surprising, considering that part of what we see of the nightclub is a long line of adults who are nowhere near her age.
    • While she is initially shown to hate Soundcheck in contrast to her partner, she eventually comes to like them by "Disorder in the Court", having attended one of their concerts. The Movie would later establish that she has a love/hate relationship with the band. "Soundcheck Part Deux" would also confirm that she hates the music genre of pop, not just Soundcheck.
    • "Life of O'Brian" reveals that Olive knows quite a lot about laser chickens. Not so much about their eggs, though...
    • She also knows how to operate the tubes, despite working in the Investigation department and having never worked in the Maintenance/Transportation department.
    • As shown in "Fistful of Fruit Juice", she loves cleaning, and states that she loves when dust gets in her eyes and makes her throat burn.
    • While she is well-known for her athleticism, in "Trials and Tubulations", she has a conversation with Otto about enjoying walking as a form of exercise, encouraging him to take it up by suggesting he start using walking sticks.
    • "Oscar the Couch" implies that she's quite skilled at hypnotizing people, but not so skilled at snapping people out of hypnotism.
    • Numerous episodes, as well as The Movie, reveal that she is both a Badass Driver and an Ace Pilot — she can not only drive kiddie cars and makeshift carts, but can also pilot an ice-cream-truck spaceship with ease.
  • Huge Guy, Tiny Girl: She is shorter than Otto in the show, but in the original pilot, it's the inverse, with her being the taller one.
  • Jerk with a Heart of Gold: While she can be harsh, she really does care for both Odd Squad and her clients.
  • Leader Wannabe: Her goal is to become an Odd Squad Director in the same vein as Ms. O. While "The O Games" showed her becoming one for a day as a prize for winning the eponymous competition, she eventually succeeds in becoming an actual Director in the Season 1 finale, being transferred and promoted to the precinct in the next town over in place of Orville.
  • Little Miss Badass: One of Odd Squad's best agents who can also hold her own in a fight.
  • Little Miss Snarker: Being a Deadpan Snarker comes with being the Only Sane Man. A lot of her reactions to things are full of snark.
  • Mama Bear: Can act this way towards Otto at times, such as when fretting over leaving him in Headquarters alone while she heads out for her day off in "Captain Fun".
  • Mr. Vice Guy: One of Olive's vices is her tendency to become smug and cocky if she believes that she's correct or if she thinks that something will go well. More often than not, it will backfire on her.
  • Neat Freak: Implied in episodes such as "Trials and Tubulations", where she isn't necessarily thrilled about covering herself in mud to avoid laser chickens' detection, but does so anyway (and ends up less dirty than Otto).
  • Only Sane Man: Oscar and Otto are easily flappable, and so she often takes this position.
  • Passionate Sports Girl: In most sports — you name it, she loves it.
  • Platonic Boy/Girl Heroes: With Otto.
  • Plucky Girl: Borders on Determinator.
  • Put on a Bus: Leaves in the first season finale to be a Director for another precinct. Dalila Bela would later have a voice-only cameo in an OddTube episode and star in The Movie before officially departing from the show.
  • Rank Up: Is promoted to the Management department and becomes an Odd Squad Director of a neighboring precinct in the Season 1 finale, along with Otto.
  • Regal Ringlets: Her hair is tied in a loose corkscrew ponytail. Unlike most examples, however, she isn't royalty, nor does she act regal.
  • Rookie Male, Experienced Female: Olive has been an agent much longer than Otto has.
  • Savvy Guy, Energetic Girl: Gender Flipped here. Olive is the experienced and calm one to Otto's new and energetic.
  • Shell-Shocked Veteran: She becomes this after the pienado.
  • Shrinking Violet: She was shy as an agent-in-training and had a huge lack of self-confidence. The shyness stuck around when she became an agent, but was dropped entirely when her old partner attacked.
  • Textile Work Is Feminine: While it's not shown onscreen, Olive is quite the skilled seamstress, having sewed multiple Burly Bears uniforms.
  • Tomboy: Very much so. She would rather wear pants than a skirt even if the latter is mandated in her department's dress code, she despises princesses, and enjoys sports and reading comic books.
  • Trademark Favorite Food: The OddTube episode "Interview with Olive" reveals that as an Odd Squad Director, her signature drink is water, which fits with her "plain" food preferences (such as cupcakes with no frosting).
  • True Companions: With Otto.
  • Why Did It Have to Be Pie?: Heavily emphasized in "The Briefcase" and explained in "Training Day".

Agent Otto

Played by: Filip Geljo, Jaden Michael (pilot)
https://static.tvtropes.org/pmwiki/pub/images/agent_otto.png
A 10-year-old new recruit of Odd Squad. Otto is fascinated by everything that goes on around him and often wants to learn more about the inner workings of his workplace. In spite of his insatiable appetite and his wild eccentricity, he and Olive have a strong friendship bond and make a perfect team.

  • Ascended Fanboy: He's a huge fan of Soundcheck. Not only does he get to meet them on multiple occasions, but he also gets to sing with them.
  • Beware the Nice Ones: While he never hits his Rage Breaking Point, he can get close, especially if Olive is in danger.
  • Big Eater: Oh yes. You name it, he eats it. And he's got the appetite to match.
  • Character Development: He starts to become more serious and experienced as Season 1 progresses, and by "Robert Plant", he becomes confident and skilled enough to tackle oddness solo without Olive's aid.
  • Cloudcuckoolander: Of the four main characters, he's definitely the least grounded, but compared to some of the secondary characters he seems quite well adjusted by comparison.
  • Desperately Looking for a Purpose in Life: Otto changes his potential future careers on the daily, going from Olympic speed skater to tornado chaser to magician. It doesn't seem to bother him in the slightest.
  • Determinator: Oftentimes, he averts this trope, becoming pessimistic and losing hope whenever something odd happens or he hits a snag in a case. However, Olive is usually the one to set him right again.
  • Does Not Like Spam: Like Olive, he doesn't enjoy eating Delivery Doug and Delivery Debbie's egg salad pizza combination — he has trouble even trying to fit a bite into his mouth.
  • Fake Defector: He pretends to turn to Odd Todd's side in the Season 1 finale, with his first act of oddness being to open all the doors in Headquarters and let creatures run loose. However, he simply plays along to the villain's whims in order to truly defeat him once and for all.
  • Grade-School C.E.O.: Becomes this in the Season 1 finale alongside Olive. After the events of The Movie, he goes back to leading his precinct.
  • Hidden Depths:
    • "Robert Plant" shows him operating the tubes' main computer just like his partner can, despite having never worked in Maintenance/Transportation.
    • While he loves Soundcheck, a boy band known for their many cheesy love songs, "Mystic Egg Pizza" implies that he loves Silly Love Songs in general, as he grows to like Delivery Doug's song.
    • He is shown to admire hypnotism in "Oscar the Couch", and like Olive, he is easily able to put someone into a trance by following Oscar's instructions of clapping twice and saying "couch alert". However, he has a better grip on the skill than his partner — not only does he learn to clap twice more if he wishes for the hypnotized person to repeat what they said, but he easily masters Olive's method of snapping someone out of a trance despite having never been told it.
    • Numerous episodes show that he's no jock, and is terrible at sports. About the only thing he can do sport-wise is skillfully dribble a basketball. This is in contrast to Olive, who is a Passionate Sports Girl and can play most any sport.
  • Huge Guy, Tiny Girl: Otto towers over nearly every single girl in the main cast, including Olive. In the original pilot for the show, the heights are inverted, with him being shorter than Olive.
  • Nice Guy: He is generally nice towards everyone, barring villains.
  • Not So Similar: Averted. Odd Todd sees him as a "new Todd" and nothing more than a replacement for him. Otto is quick to retaliate by telling him that he'll never be like him and that he'll be a "regular me".
  • Obsessed with Food: Goes hand-in-hand with his Big Eater status. He'll often be distracted by food while on a case.
  • The Pig-Pen: While it's more of a subtle trait, a couple episodes have shown that Otto isn't the neatest agent at Precinct 13579. "Trials and Tubulations" shows him eagerly slathering himself in mud at Ms. O's discretion, and "O vs. The Ballcano" reveals that he has a good six years' worth of junk in his locker despite working at Odd Squad for less than a year.
  • Platonic Boy/Girl Heroes: With Olive.
  • Purely Aesthetic Glasses: He's seen wearing a pair of glasses in "Oscar the Couch", which Orchid (somehow) puts back on his face, but he isn't visually impaired in any manner and doesn't normally wear any kind of glasses.
  • Put on a Bus: Leaves with Olive to be a Director for another precinct in the Season 1 finale. Filip Geljo would later go on to star in The Movie before officially departing from the show along with Dalila Bela.
  • Rank Up: Is promoted to the Management department and becomes an Odd Squad Director of a neighboring precinct in the Season 1 finale, along with Olive.
  • Read the Freaking Manual: He hasn't read his Odd Squad Training Manual due to the fact that he runs on instinct. Immediately after he tells Olive this, he ends up colliding with a door. This is contrasted with Olive, who is presumed to have had read her manual.
  • Real Men Wear Pink: In "Rise of the Hydraclops", he grows attached to Oscar's teddy bear, Norman, when the Scientist uses it as a ruler — so attached, in fact, that he's willing to abandon food just to play with the toy and never lets go of it up until he's ordered to take his shoes off by Oscar at the end of the episode.
  • Rookie Male, Experienced Female: Otto is new to the Squad while Olive has already had a former partner.
  • Savvy Guy, Energetic Girl: Gender Flipped here. Olive is the experienced and calm one to Otto's new and energetic.
  • Stalker Shrine: Otto has one in the form of an entire room, dedicated to the four band members of Soundcheck and plastered in everything from shirts to photos to posters. However, instead of being appalled, Danny T is in sheer awe when he is first introduced to it.
  • Sitcom Arch-Nemesis: He has an implied bad history with Orchid and often talks to her as though she's a toddler, which isn't helped by her Bratty Half-Pint attitude and The Dreaded status among agents.
  • Supreme Chef: While not displayed in-show, the episode "The Confalones" reveals that he makes good meatballs.
  • True Companions: With Olive.
  • The Watson: As a new recruit, he's usually the one who asks when something needs to be explained.

Agent Oscar

https://static.tvtropes.org/pmwiki/pub/images/oscar_7.jpg
Played by: Sean Michael Kyer

The head scientist of Precinct 13579's lab. Goofy and ditzy, he has a gadget for almost everything. He takes care of his gadgets, and he always greets others with "Hey guys!" He is renowned for creating addable gadgets and for starting the first Odd Squad lab.

  • Absent-Minded Professor: Genius, but can be a bit forgetful.
  • Adorkable: He's awkward but endearing.
  • Beleaguered Assistant: Serves as one to Ms. O in some episodes, often carrying out her orders to fetch her a juice box or make dresses for her. His assistant role is more prominent in the pilot.
  • Character Development: Throughout Seasons 1 and 2, he goes from being a timid, awkward scientist who would prefer staying in the lab than going out onto the field to a complete badass who manages to fend off a swarm of hypnotized scientists using the seventeen lab coats he wears. It's topped off by his promotion to President of the Scientists in "Oscar Strikes Back".
  • Compressed Vice: "Odd Squad Needs You" shows him being terrified of Ms. O, to the point where he has a bunker set up in his lab for him and Oona to hide in. This is despite the fact that numerous past episodes have shown that, while he is often startled by her actions and frequent yelling, he isn't outright afraid of her.
  • Crippling Overspecialization: While he is proficient in building and fixing gadgets, he does not fare well in other positions. This is evidenced by him being fired from over sixty jobs at Precinct 13579, either due to his inexperience or due to his ditzy but timid nature. Because of this flaw, Ms. O creates the Science position just for him so he can put his skills to good use without having to leave Odd Squad.
  • Gadgeteer Genius: He makes various gadgets for the Odd Squad agents. Though making gadgets is a thing every scientist does, he's special for the fact he created addable gadgets, a very important tool in Odd Squad. In addition, the Science position as a whole was created for him to put his skills to good use, which spurred other precincts to start their own labs.
  • Genius Ditz: He's very smart, but can be a bit awkward.
  • Hairstyle Inertia: Averted. Oscar alternates between two hairstyles throughout the show (which is a result of episodes and other side material being filmed at different times), something that "Best Seats in the House" provides an in-universe explanation for. "The Curious Case of Pirate-itis" also reveals that he's gone through six different hairstyles, all of which were copied from Odie, another Scientist.
  • Hidden Depths:
    • In "Invasion of the Body Switchers", Oscar becomes stuck in Ms. O's body right before she's set to take her O Test. At one point, he remarks how, if she gets fired, he'll ruin her life. Whether that means he's a heroic Starscream, he's taking advantage of Ms. O's strength, or if he's even being genuine is completely up for interpretation.
    • He is shown to be quite the skilled hypnotist in "Oscar the Couch".
    • "There Might Be Dragons" gives him a chance to show off his electrical skills, managing to restore power to Headquarters despite it taking longer than intended.
  • "I Am Great!" Song: "Oscar is Awesome" is Exactly What It Says on the Tin: it's a boastful song about how awesome and badass Oscar is.
  • The Klutz: Boy howdy, is he ever.
  • Labcoat of Science and Medicine: A trademark of his department.
  • Let's Get Dangerous!: Despite his timid, ditzy nature, he's quite proficient in fighting oddness. He even manages to beat Odd Todd — one of the toughest villains of the series — in a 1-on-1 fight using magnets on a handmade vest and a bag full of tomatoes.
  • Mad Scientist: While he's not evil, a lot of problems occur due to one of his inventions going wrong.
  • Mentor Archetype: He becomes a mentor to Oona in Season 2, teaching her the ins and outs of the Science department before his departure in "Oscar Strikes Back".
  • Nerd Glasses: Sports a pair of these that he's often seen adjusting.
  • Put on a Bus: Leaves Precinct 13579 to become President of the Scientists at the Odd Squad Academy's Science building in Season 2.
  • Rank Up: He is promoted to the position of President of the Scientists in "Oscar Strikes Back", and leaves Precinct 13579 to work in the Science building on the campus of the Odd Squad Academy.
  • Real Men Wear Pink: In "Rise of the Hydraclops", he is revealed to have a Security Blanket in the form of a stuffed teddy bear named Norman, which he uses as a ruler to find his way to the secret weapon he has buried.
  • Say My Name: It's a Running Gag in Season 1 for someone to scream his name, usually in a frustrated manner and usually when he gets off-track.
  • Selfie Fiend: In "Picture Day", he not only treats photography as Serious Business, he spends at least nine hours taking selfies of himself and completely forgets about going out to eat with Olive and Otto.
  • Smart People Build Robots: He builds 25 Oscarbots that look nearly identical to him in order to build Ms. O the perfect juice box. They look and act so humanoid that Olive has to ask in sheer disbelief if he cloned himself upon watching them all gather together in the bullpen.
  • Teen Genius: See Gadgeteer Genius.
    • A sidenote: he ages further in the Season 2 premiere, due to his actor aging in real time. In-universe, this is due to an aging gadget going off.
    Ms. O: Something's different about you.
    Oscar: Oh yeah. This Make-You-Older-inator went off. I like the new voice, though.
  • Textile Work Is Feminine: Inverted — Oscar is shown to be quite the capable tailor, and can make quite a lot of clothing in a short span of time.

    Season Two 

Agent Olympia

https://static.tvtropes.org/pmwiki/pub/images/agent_olympia.jpg
Played by: Anna Cathcart

Otto's replacement and one of the main characters of the second season.

  • Beware the Nice Ones: Sure, Olympia's a Genki Girl, but she's not afraid to show her mean side.
  • Character Blog: Olympia hosted the first season of OddTube, a 20-episode vlog. She passes the torch to Orla for the second season.
  • Contrasting Sequel Main Character: While only a new cast for a new season, this still applies as Otis and Olympia have the exact opposite dynamic as Olive and Otto, save for Olympia being the one who's the protocol fiend and the chipper bouncy one while the more reserved Otis is frequently sighing in irritation at her antics.
  • Crippling Overspecialization: Olympia may be hard-working and skilled while solving cases as an Investigation agent, but put her in the Maintenance position and she becomes very overwhelmed very quickly.
  • Cute, but Cacophonic: Make no mistake — when Olympia screams or shouts, it's loud.
  • Dreadful Musician: Averted. Not only does she have strong vocals, but can also play instruments such as a ukulele and a keyboard.
  • Genki Girl: Olympia is very enthusiastic and full of energy.
  • Fangirl: Olympia's one of Otto and Olive, and freaks out every time she gets to meet them.
  • Fatal Flaw: Her lack of belief in villains making Heel-Face Turns. It bites her in the butt big time in the Season 2 finale upon finding out that Otis was a former villain, as he and Ms. O get fired from Odd Squad as a result.
    • By far her biggest flaw is her obsession with work. She will often overwork herself with the overall goal of being the best agent Odd Squad as an organization has ever seen, as well as wanting to impress others such as Olive and Ms. O, refusing to relax or take a vacation until Ms. O herself forces her to as per an existing rule — to such an extent that once she gets going, she becomes physically unable to stop herself. However, her Workaholic tendencies often get in the way of anything not involving work, such as having lunch with Otis.
    • Her other big flaw is her drive for perfectionism, which goes hand-in-hand with her aforementioned Workaholic flaw. Even for something as casual as a party for a departing co-worker, she strives for perfection in nearly everything she does, and if someone tells her that she's not perfect at something she does, she will go to incredible lengths to hunt them down and confront them with nary another thought. Her desire to be a perfect agent has caused trouble for her co-workers on more than one occasion, especially Otis, who often reminds her that she doesn't need to be perfect and that failing at something is normal and acceptable to do.
    • She is physically unable to say "no", which causes her issues in "Olympia's Day" when Ms. O opens up a room for her and the Noisemaker to talk things out in. Dr. O and Ocean both catch on to the opening and ask Olympia to stay in the room, and it gets progressively worse from there as more agents get wind of the new room due to Olympia accidentally letting it slip. It gets to a point where, after cramming 16 agents into the room, she goes through massive Sanity Slippage and ends up hallucinating before passing out (an occurrence known as "slipping into mathness").
  • Foil: To Ohlm. Both of them were excellent students at the Odd Squad Academy. But while Olympia was happy to just be an agent, Ohlm wanted to become the Big O immediately. This resulted in him plotting to take over Odd Squad.
  • Hidden Depths: If the Cold Open of "License to Science" is any indication, Olympia knows how to play football pretty well and can hold her own against three football players dressed in uniform.
    • "There's No O in O-bot" reveals that she's taking piano lessons, and is skilled enough to be able to read sheet music.
    • In "New Jacket Required", she's able to tell that Otis is wearing a new jacket by noting tiny details such as stitches and lapel size.
  • The Knights Who Say "Squee!": She is a big fan of Olive and Otto as well as their work, and idolizes them to incredible degrees. When she meets them in-person for the first time in The Movie, she becomes so starstruck that she can't form a coherent sentence.
    • She also idolizes Orla, albeit to a far lesser extent, complimenting her on her Spock Speak and her many adventures with the Mobile Unit.
  • Meganekko: Olympia's cute and a glasses wearer.
  • Motor Mouth: She talks a lot, and isn't afraid to weaponize it if need be.
  • Nice Girl: She's very sweet and kind.
  • The Perfectionist: Holy moly, is she ever.
  • Reformed, but Rejected: Her Fatal Flaw. She believes in "once a villain, always a villain", and doesn't think that villains that have genuinely reformed can change for the better. She gets better by the end of Season 2.
  • Savvy Guy, Energetic Girl: Olympia is a Genki Girl while Otis is more reserved.
  • Platonic Boy/Girl Heroes: With Otis.
  • Plucky Girl: Like her predecessor, Olive, Olympia tries hard and is a diligent agent.
  • True Companions: Best friends with Otis.
  • Workaholic: And how.

Agent Otis

https://static.tvtropes.org/pmwiki/pub/images/agent_otis.jpg
Played by Isaac Kragten

Olive's replacement and one of the main characters of the second season. He came from... somewhere. Like Olympia, he is introduced in the second season premiere.

  • Absurd Phobia: Otis is not a fan of ducks. He thinks it's his old family coming for him.
  • All-Loving Hero: He's a friendly agent in the Squad and he always sees the good in people no matter how evil they are.
  • The Cast Showoff: Kragten is a professional dancer, and Otis is shown dancing more than once in the series.
  • Crippling Overspecialization: Like Olympia, he is skilled on the field, but can't handle the consistent workflow that the Maintenance position in particular has.
  • Dark Secret: He used to be a villain.
  • Flight: Is revealed to be able to fly in the Season 2 finale.
  • Heel–Face Turn: Is revealed to be the White Sheep of a villainous duck family.
  • Hidden Depths: Season 2 reveals quite a few hidden things about Otis.
    • "A Job Well Undone" implies that Otis has a talent for face-painting, as he draws a cat on Hopkins' face at the birthday party.
    • In the Cold Open of "Rookie Night", he delivers some kind words to a plant with an attitude issue and acts very much in the vein of a therapist for it. Later on, he reveals that he automatically denies any chance to try new experiences, doing so when offered to go skydiving for the eponymous event before changing his tune when he learns what skydiving is.
    • The ending of "Sir" reveals that Otis is a good chef, in contrast to those like Olympia, who can't even bake a cake by following a recipe.
    • Another contrast Otis has with Olympia is his hidden disdain for talent shows, as revealed in "Agent Orchid's Almost Half-Hour Talent Show".
    • In "The Ninja Situation", Otis shows off just how skilled he is in battle. His agility allows him to dodge most of the Evil Ninja's attacks.
    • Like Olympia, Otis also displays some skill in playing football in the Cold Open of "License to Science".
    • "There's No O in O-Bot" reveals that Otis is taking yoga classes at a hot yoga studio in town.
    • He enjoys eating oranges, and gets some as part of Joy LaFleur's deluxe track-and-field package in "Where There's a Wolf, There's a Way". In addition, "Back to the Past" reveals that he also loves hot dogs, and "Slow Day" reveals that he hates pickles, thinking of them as a "wet vegetable".
    • "Odd Squad Needs You" reveals that while Otis loves movies, he's not so skilled at making them.
    • In "Who is Agent Otis?", he demonstrates a knack for sewing, as he is shown putting together a blanket made out of duck feathers. He also may have a little Scientist blood in him, considering he built a translator voicebox for his duck family to use.
    • Just as Olympia is able to play a keyboard in "Show Me the Money", Otis is also able to play a saxophone.
    • While it's justified as Isaac Kragten is a professional dancer, "The Creature Whisperer" features Otis' dancing ability for the first time, as he does so in order to stall the presumed Big O.
    • A brief conversation with Olympia in "And Then They Were Puppies" reveals that Otis is Not a Morning Person, and while he can wake up easily, he often goes back to sleep once he does. There's some Fridge Brilliance to be found here — ducks often employ power naps to get sleep and sometimes sleep in rows (those at the end of rows are light sleepers). Since Otis is a human raised by ducks, this would explain his abnormal sleep habits.
    • In the OddTube episode "Otis Fills In", he dances to a Soundcheck song while the camera is still running, which implies that he may like the band and/or their music.
  • Mysterious Past: Like in Oscar's words, "Then where did he (Otis) come from?" Otis's past is the main mystery of the second season. It is hinted to have something to do with villains and is confirmed.
  • Raised by Wolves: He was raised by ducks.
  • Read the Freaking Manual: Otis has not read the Odd Squad handbook at all. This is contrasted with Olympia, who loves to get her hands on anything OS related.
  • Savvy Guy, Energetic Girl: As noted above, he is the Savvy Guy to Olympia's Energetic Girl.
  • Socially Awkward Hero: When he started off, Otis wasn't very good at communicating with others. He got better.
  • Supreme Chef: The end of "Sir" reveals that he is apparently quite the skilled cook.
  • Undying Loyalty: To Ms. O, after she helped him put an end to his duck family's Evil Plan and trained him herself to be an agent of Odd Squad.
  • Walking Spoiler: It's hard to talk about him without exposing his past.
  • White Sheep: Of his family of ducks. He didn't want to destroy the world, and subsequently left to join Odd Squad.

Agent Oona

https://static.tvtropes.org/pmwiki/pub/images/oona_odd_squad.jpg
Played by: Olivia Presti

Oscar's assistant and eventual replacement, becoming the head of the Science Department.

    Other Agents 

Agents Oren and Olaf

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Oren (left) and Olaf (right)
Played by: Brendan Heard (Oren) and Eshaan Buadwal (Olaf)
Two recurring supporting characters. They are often opponents of Otto and Olive.

  • Absurd Phobia: Oren seems to be scared of pancakes.
  • Blatant Lies: During a "Meet the Agents" sequence, Oren says that he's great at sharing (followed by a clip of him and Olaf fighting Olive and Otto over new office chairs) and that's he's a very hard worker (followed by a clip of him and Olaf lounging in the ball pit).
  • Catchphrase: For Olaf: "I'm Olaf!"
  • Cloudcuckoolander: Olaf is possibly the most odd-ball member of Odd Squad, which is saying something.
  • Hidden Depths: Olaf tends to be simple-minded, but can have surprising moments of genius. For example, in one episode, Otto keeps shrinking and Olive has to team up with Oren and Olaf to find a cure. Olaf proves to be the only one who knows the secret to reversing the shrinking, and his normally very limited vocabulary begins to approach Sesquipedalian Loquaciousness.
  • It's All About Me: Oren.
  • Noodle Incident: "If Ms. O offers to send you to Blobsylvania to count blobs, DO. NOT. GO." Subverted in that we get to see a clip of Oren and Olaf counting blobs.note 
  • Perpetual Smiler: Olaf is almost always happy and excited, which sometimes gets on Oren's nerves.
  • The Reveal: Olaf is a werewolf
  • Sitcom Arch-Nemesis: To Olive and Otto.
  • Those Two Guys: Agents who appear every so often to annoy our heroes.
  • Trademark Favorite Food: Olaf loves potatoes.
  • True Companions: Really do care for each other.

Agent Orchid

https://static.tvtropes.org/pmwiki/pub/images/agent_orchid.jpg
Played by: Michela Luci
One of the younger agents, she is sassy and particular.

Agents Octavia and Oz

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Played by: Julia Lalonde (Octavia) and Carson Reaume (Oz)

Octavia, another agent, will appear here and there in Season One. She is not the smartest tool in the shed, but always tries to be helpful. Her partner, Oz, is only seen in flashbacks, and for good reason.

  • The Ditz: Agent Octavia. She doesn't always understand things.
  • Invisibility: Agent Oz, thanks to looking at a gadget the wrong way.
  • Nice Girl: Octavia is there to help, even if she doesn't know what's she's doing.

Agent Ohlm

https://static.tvtropes.org/pmwiki/pub/images/agent_ohlm.jpg
Played by: Jaiden Cannatelli
Introduced in the first season finale. Quite dimwitted.
  • Bond Villain Stupidity: Ohlm was so focused on getting revenge on Odd Squad that he didn't stop to think about himself getting sucked into his own black hole. He could have used a getaway vehicle or something to escape his own doom.
  • Crouching Moron, Hidden Badass: While looking and acting dumb, he is still a good agent and succeeds in getting the remote for the Puppy Ray back.
  • Evil All Along: Revealed to have been plotting to take down Odd Squad since he started working here, because he wasn't made the Big O immediately upon graduating the Academy.
  • Foil: To Olympia. Both of them were excellent students at the Odd Squad Academy. But while Olympia was happy to just be an agent, Ohlm wanted to become the Big O immediately. This resulted in him plotting to take over Odd Squad.
  • Four Eyes, Zero Soul: When Ohlm reveals his true colors in the Season 2 finale, he puts on a pair of glasses.
  • Knight of Cerebus: Hey you know all those Affably Evil villains on the show who are rather good friends with the Squad? Well you're not going to find any of those traits in this child.
  • Last Episode, New Character: Season 1 ends with Ohlm being introduced as Otto's temporary new partner, and continues to appear throughout Season 2 as a recurring character.
  • Obfuscating Stupidity: He used his dumbness to hide his real plans to destroy Odd Squad.
  • Repetitive Name: His full name is Ohlm Ohlm.
  • Ungrateful Bastard: You'd think that Ohlm would have been grateful that the agents were willing to save his life after they found out his true colors, but no, he continues threatening to destroy the company after they closed his black hole and doesn't even thank them. Yeah, he had that grounding coming.
  • Walking Spoiler: He's been faking his ditziness to help villains to sabotage his precinct, so he could manipulate events to get Ms. O fired and destroy Odd Squad.
  • You Are Grounded: Is grounded by his parents when defeated by Ms. O.

Agent Obfusco

https://static.tvtropes.org/pmwiki/pub/images/agent_obfusco.jpg
Played by: Jaeden Noel
He's an expert on dealing with oddities and trains current agents. However, he talks in a weird way, which means it's hard for agents to understand him.

Dr. O

https://static.tvtropes.org/pmwiki/pub/images/agent_dro.jpg
Played by: Peyton Kennedy
Obviously, the Doctor of Precinct 13579.
  • Always Introduces Themselves: A standard conversation with her will often start with “Hello I’m Dr. O, we work together at Odd Squad” “Yes I know who you are”. She has done this even to people she was talking to shortly before or should know well (like when she reminds Oscar of the time they went on a mission together).
  • Bizarre Taste in Food: Her favourite food is apparently unicorn tears.
  • Catchphrase: "Trust me, I'm a doctor".
    • Also "WHAT'S NEXT??".
  • Child Prodigy: While all agents of Odd Squad can count as this to various extents, Dr. O is a notable example due to her claim of having gone through eight years of medical school to become a doctor. While how and where she did this is not shown, the fact that The Movie shows her working in what appears to be a real hospital after Odd Squad is shut down indicates her qualifications are not only real but are also recognized by adults.
  • The Comically Serious: She is less prone to acting silly, and gets down to business. Her abrupt deadpan and straight face contrast with everyone else's behavior, making her funny.
  • I'm a Doctor, Not a Placeholder: Dr. O is always reminding everyone that she's a doctor.
  • Lab Coat Of Science And Medicine: Wears a labcoat over her Odd Squad medical uniform. Unlike the white labcoats of the scientists, hers is a light blue. Also, while all scientists are shown wearing their own labcoats, minor and background medical staff do not, suggesting the labcoat is specifically part of her position as the head Odd Squad doctor.
  • The Medic: Is the main Doctor of Precinct 13579 before being Put on a Bus in Season 2 (see below).
  • Put on a Bus: Departs for the Odd Squad Space Station in "Doctor O, Party Time, Excellent."
  • Super Doc: The only one at Precinct 13579, and knows how to treat both oddities and normal illnesses.
  • Trust Me, I'm an X: She says stuff like this often.

Agent Oksana

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Played by: Madeleine Barbeau
The cook of the precinct. Is neither talkative nor emotional.

  • Absurdly Dedicated Worker: In The Movie, Odd Squad is shut down. However, Oscar and Ms. O discover that's she's still cooking and making food there.
  • The Comically Serious: Even more than Dr. O: her Emotionless Girl tendencies mixed with her sarcasm make her hilarious to viewers, though scary to her teammates.
  • Crazy-Prepared: Always keeps pudding on hand in case of a invisible dinosaur invasion. It was even in her video guide.
  • Creepy Monotone: Speaks in one.
  • Deadpan Snarker: Many of her lines are sarcastic, and she's actually deadpan.
  • Emotionless Girl: You'll get no reaction from her.
  • Jerk with a Heart of Gold: Makes unreasonable demands in "Agent Oksana's Kitchen Nightmares" (like multiple bars of gold), but it's eventually revealed that she needs the items to get the best food for the squad.
  • Team Chef: Until the events of "Dr. O No", she is the sole cook of #13579. Whether she is a Supreme Chef or Cordon Bleugh Chef is unknown, though evidence points to the former.

Ocean

https://static.tvtropes.org/pmwiki/pub/images/unknown_1_91.jpeg
Played by: Elijah Sandiford
A new employee, he works with odd creatures. He's an expert at dealing with them and taking care of them.

  • Fluffy Tamer: His expertise extends to frightening animals, and cares for them as well.
  • Friend to All Living Things: He is very fond of creatures and will risk his life to give one the chance of survival.
  • Mellow Fellow: So laid-back it's amazing he doesn't slide out of his hammock onto the floor.
  • Nature Lover: Comes with his love of animals.
  • The Watson: Ends up having to ask the questions, such as in "A Case of the Sillies" where he needs to know about measurement quantities.

    Season Three (Mobile Unit

Opal

https://static.tvtropes.org/pmwiki/pub/images/img_3188.jpg
Played by: Valentina Herrera
One of the main characters of Season 3, she and Agent Omar used to be in the Arctic precinct until they got transferred to a mobile unit.
  • Agent Mulder: She believes in the 44-leaf clover and wishes to find it. She eventually does find it along with her friends.
  • Blood Knight: Has shades of this, as she is often the first to throw down against, and antagonize, villains.
  • Cain and Abel: The Abel to The Shadow's Cain. Compared to her sister, Opal is far more benevolent and kind.
  • Captain's Log: Starts one in "It's Not Easy Being Chill".
  • Catchphrase: "We are an elite team of agents..." There's a whole monologue to follow, but she rarely gets past the above sentence.
  • Create Your Own Villain: The Shadow mentions that Opal made her who she is.
  • Expy: Her perfectionist mannerisms and role as the Straight Man to Omar call to mind Otis and Olive, her predecessors, as well as Olympia (who has a similar perfectionist tendency).
  • Hidden Depths: When attempting to stall Orchid in "Slides and Ladders", a whiteboard is shown as Opal rattles off answers for her question of how to beat a laser chicken. Considering the drawings and complicated math equations, it's implied that Opal may have more mathematical talent than she lets on (or at the very least, artistic talent).
  • Really Fond of Sleeping: The "Powering Through a Power Nap" Training Video reveals that she has perfected the art of "power napping", having the ability to take short, 1-minute naps and wake up well-rested.
  • The Leader: Once the Mobile Unit is formed, she takes on the role as the de facto leader of the team.
  • The Perfectionist: Even moreso than Olympia. She views OSMU in very high standards and strives for the team to be perfect. This is evident in episodes such as "Running on Empty" and "Down the Tubes".
  • Put on a Bus: She leaves the Mobile Unit in the season finale to help her sister reverse the damage she caused in other countries.
  • Safety Worst: The season finale reveals that the reason her sister became a villain was because Opal was overprotective of her when the two were attending the Odd Squad Academy.
  • Straight Man: To Omar.
  • Unknown Rival: Unbeknownst to her, the Shadow has a grudge against her. The reason for this is set up as the main mystery for season 3.

Omar

https://static.tvtropes.org/pmwiki/pub/images/img_3189.jpg
Played by: Jayce Alexander
One of the main characters of Season 3, he and Agent Opal used to be in the Arctic precinct until they got transferred to a mobile unit.
  • Big Eater: He seems to have a penchant for pies in particular.
  • The Ditz: Omar isn't very bright. For example, in "Running on Empty", he tries to use porous things to catch the blob.
  • Expy: His goofy personality and Big Eater tendencies may remind some of his predecessors, Olympia and Otto.
  • Hidden Depths: "The Void" reveals that unlike the rest of OSMU, Omar can't rollerskate. He manages to learn how to with the help of Oneta.
  • The Lancer: Serves as a comical Foil to everyone in the team no matter who he's paired with, but especially Opal.
  • Nice Guy: Very friendly and affable.
  • Perpetual Smiler: He's pretty much always smiling.
  • The Pollyanna: He always looks on the bright side of things.
  • We Need a Distraction: Tries to distract Orchid in "Slides and Ladders" and Orla in "Orla's Birthday."

Oswald

https://static.tvtropes.org/pmwiki/pub/images/img_3242_1.jpg
Played by: Gavin Mac Iver-Wright
One of the main characters of Season 3. He was a worker for the Odd Squad Museum of Natural Odd in New York, having left to join Agents Opal and Omar on their quest to find the 44-leaf clover.
  • Cowardly Lion: Shown to be fearful at times, but manages to solve cases.
  • Does Not Like Spam: He doesn't like pineapple juice.
  • Expy: Shares some traits with Oscar, being The Smart Guy of the group who is also quite timid.
  • Hidden Depths: "Oswald in the Machine" shows that he's quite skilled at doing the robot dance.
    • He also likes throwing snowballs and watching people catch them, as revealed in "Running on Empty".
  • Red Is Heroic: He has red hair and is one of the good guys.
  • Sleepyhead: In "Down the Tubes", he enters Tube Station 5, the home of a family, and falls asleep from exhaustion on their table. The end of the episode shows him still asleep while riding the tubes, and not even Orla — who is known for being loud and brash — is able to wake him up.
  • The Smart Guy: The smartest of the OSMU team, thanks to all the knowledge he gained from working at the library. He's an expert on porosity, directions, and basic math.
  • Youthful Freckles: He has some freckles on his face.

Orla

https://static.tvtropes.org/pmwiki/pub/images/agent_orla.jpg
Played by: Alyssa Hidalgo
One of the main characters of Season 3. She is the eldest member of the group, being 500 years old.
    Major Villains 

Odd Todd

https://static.tvtropes.org/pmwiki/pub/images/tumblr_inline_npadw7x5zb1rv5alo_250.jpg
Played by: Joshua Kilimnik
A former Odd Squad agent who was the best at solving many cases and winning many awards (including the one for most awards). He is really good at solving math problems in his head, leading to his successes. Eventually, he started to believe that the Odd Squad's quest to stop odd things from happening was wrong, so he started to deliberately cause odd cases to be unsolved. He got fired for this, then came back to cause a Pie-nado in HQ and re-invent himself as a villain.

  • Affably Evil: He can be a nice person, and is generally amicable to Olive and Otto.
  • Anti-Role Model: Oh yeah, him belittling his partner Olive and letting his pride get the best of him are major reasons he got fired from the squad. That's a difference between him and Otto. They both were Olive's partner, but Otto actually cared for Olive and allows her to have a say in things. Todd on the other hand looked down on Olive, and cares more about his personal image more the his partner.
  • Arc Number: His agent number is 43, and that number appears multiple times in the series.
  • Benevolent Boss: For an arrogant, mischievous, chaos loving villain, he's very nice to his minions.
  • Chaotic Evil: He wants to cause odd things to happen For the Evulz.
  • Child Prodigy: There's a reason he was labeled as Odd Squad's best agent.
  • Cloudcuckoolander: Being odd can do this to you.
  • Control Freak: As a gardener.
  • The Dreaded: Before his origins were revealed, many agents avoided talking about him.
  • Even Evil Has Standards: in the Season 1 finale, he got freaked out by all the odd creatures released by Otto.
  • Evil Genius: He's shown to be incredibly intelligent and a savvy problem solver. While he was a very successful Odd Squad agent, he's also quite ruthless, calculating and devious
  • Evil Is Hammy: Loves to ham things up in nearly all of his scenes.
  • Face–Heel Turn: He was a good agent until he decided to make oddness instead.
  • Fallen Hero: See The Paragon Always Rebels.
  • Hero's Evil Predecessor: Is this to Otto, being Olive's former partner.
  • Invincible Hero: Was this before his Face–Heel Turn. He could solve any case.
  • Jerkass: He was a jerk to Olive before he became evil, criticizing her habit of writing on her notebook to solve problems and calling her "Scribbles."
  • Odd Name Out: All the other agents' have names starting with "O," his starts with "T."
  • The Paragon Always Rebels: He was Ms. O's best agent until he decided oddness was better.
  • Reformed, but Not Tamed: Shows a bit of his former self as a gardener.
  • Skunk Stripe: A large white one through his brown hair.
  • Smug Snake: Being one of the smartest agents Odd Squad ever had, naturally he often sees himself as too good for rules and can be very arrogant, not paying attention to anyone other than himself. "The O Games" is a perfect example of this in action.
  • Walking Spoiler: His existence is foreshadowed a couple of times in Season 1, but he never physically appears until midway through the season, and that's when things take a darker turn.

Shapeshifter

https://static.tvtropes.org/pmwiki/pub/images/villan_shapeshifter.jpg
Played by: Laura Landauer, Aja Neinstein (young)
One of the Squad's most consistent enemies.

  • I Know What You Fear: In "The Briefcase", she turns her entire head into a pie in order to scare Olive, who is afraid of them. Later on, she turns Ms. O's briefcase into a pie in another attempt to scare the Investigation agent.
  • Sci-Fi Bob Haircut: Hers is bright blue.
  • Shapeshifter Baggage: Though she is said to retain the same weight, she has been seen to turn into things like a rocket and butterfly and still fly away.
  • Shapeshifter Default Form: A humanoid being with a bob cut and bright white pictures as a body.
  • Smug Snake: She's infamous for her serious level of pride which often leads to agents using it against her and taking her down.
  • Would Hurt a Child: Most of the villains fall under this trope, but she gets special mention, as she isn't afraid to torture Olive with the one thing that she fears most.
  • You Gotta Have Blue Hair: She does, in a Sci-Fi Bob Haircut.

Otis' Duck Family

One of the Greater Scope Villains of Season 2 and Otis' adoptive family.
  • Didn't Think This Through: Brother Quack decided to create a machine that would move the Earth closer to the sun so he and the other ducks could have the pond all to themselves... not considering the fact that doing so would fry everyone on Earth alive, including the Ducks, so his plan never would have worked out.
  • Heel–Face Turn: It's implied that Brother Quack makes one, as he reconciles with Otis at the end of the Season 2 finale.
  • Walking Spoiler: Their existence isn't revealed until the Season 2 finale, where we get to see why Otis is the way he is.

The Shadow

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Played by: Zarina Rocha
The main antagonist of Season 3 who has a vendetta against Opal and the rest of OSMU.

  • Big Bad: Of Season 3.
  • Cain and Abel: The Cain to Opal's Abel. While she is cunning, manipulative, and evil, Opal is more kind-hearted and is working on the heroes' side.
  • Cool Mask: Wears one around her eyes.
  • Dark Is Evil: Her outfit is predominantly black.
  • Enfant Terrible: One of the most malicious kid villains in this series to date.
  • Gadgeteer Genius: Is very apt with technology, and once successfully hacked OSMU's van. In "Odd in 60 Seconds", she also manages to get to the mega-computer and extract info about every known villain worldwide, without anyone detecting her.
  • Heel–Face Turn: She ends up reforming in the Season 3 finale after Opal convinces her that she can do great things just like her. By the end, she leaves with Opal to fix the damage she caused in various countries.
  • Invisibility Cloak: Dons one in "Odd in 60 Seconds".
  • It's Personal: While she's not above attacking the Main 4 in general, she has a grudge against Opal specifically.
  • Luke, I Am Your Father: She is revealed to be the younger sister of Opal, much to the agent's dismay.
  • Nice Shoes: She wears shoes with red-orange soles that are lit up.
  • Ominous Opera Cape: Has a long black one.
  • Villain Team-Up: The Season 3 trailer reveals that her overarching plan is to gather every villain from around the world to form a "Villain Network" in order to take down the Mobile Unit. The episode "Villain Networking", and her overall arc, expands on this concept.

Brutus

https://static.tvtropes.org/pmwiki/pub/images/screenshot_2020_07_08_brutus_webp_webp_image_640_360_pixels.png
Played by: Osias Reid
The Shadow's main henchman.

  • Dark Is Evil: Like his boss, he wears mostly black.
  • Enfant Terrible: Though not to the extent of The Shadow, he does have malicious intent.
  • Vile Villain, Laughable Lackey: Brutus is very loyal to The Shadow and is willing to carry out her orders as needed, but can be very dimwitted at times.

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    Minor Villains 

Other Villains

    Other Characters 

Polly Graph

https://static.tvtropes.org/pmwiki/pub/images/screenshot_2021_01_08_dboddi44_1_webp_webp_image_1275_713_pixels.png
Played by: Ava Preston
The town's resident graph expert who is a reliable ally of Precinct 13579. She sells hot chocolate and lemonade, and has a very keen eye for quality.

  • Aloof Ally: Downplayed. Polly Graph isn't an employee of Odd Squad and doesn't fight oddness alongside agents, but is always willing to help agents when they come to her stand. She also comes to Precinct 13579 often to settle conflicts.
  • Girlish Pigtails: She often wears her hair in these, which are secured by pink bows.
  • Pink Means Feminine: She likes the color pink.
  • Punny Name: A polygraph is a lie detector, which references her knowledge and usage of graphs.
  • Put on a Bus: She doesn't have any physical speaking appearances after The Movie. However, a still image of her from "Disorder in the Court" appears in "Raising the Bar".
  • Quality over Quantity: Polly Graph prides herself on quality when it comes to her lemonade, and has a keen eye for it.
  • Secret Underground Passage: Polly houses the entrance to one leading to Precinct 13579's headquarters, which was dug by Ms. O.
  • Speaks Fluent Animal: In "Bad Lemonade", she learns how to speak pigeon, and summons a flock of them to drive Odd Todd away from his own stand.
  • Will Not Tell a Lie: In the original pilot for the show, Polly tells Olive and Otto that she's not the number hog, and pulls out a graph that shows how many times she's ever lied. The graph is completely empty.
  • Young Entrepreneur: She sells both hot chocolate and lemonade from a stand set up at the end of her driveway. "Bad Lemonade" reveals that she treats her sales as Serious Business and views her stand as a legitimate business.

Amanda

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Olympia's best friend from outside of Odd Squad, who is introduced in OddTube.

  • Best Friend: She is described as Olympia's best friend outside of work and is very supportive of her.
  • Canon Foreigner: She was created solely for the web series and isn't seen in the show.
  • Cloudcuckoolander's Minder: Subtly implied to be this for Olympia in "Pandas", since Olympia is a Genki Girl and a severe Workaholic.
  • Pink Means Feminine: She wears a pink shirt under a pair of overalls.
  • Single Serving Friend: While she does make brief cameos in OddTube via mentions (and also makes a cameo on the web series' website as a picture in Olympia's locker), "The Ball Pit" is her only physical appearance and she doesn't appear in the show. Despite this, she is referred to as one of Olympia's closest friends.

Esmeralda Kim

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A girl who serves as the Running Gag for Season 3.

  • Adorably Precocious Child: She's younger than any of the OSMU agents, and yet has a packed schedule that includes various things, like flute practice, swim lessons, and caring for her sister. However, she's still plenty adorable.
  • Ambiguously Absent Parent: Neither her mother nor her father are seen or mentioned. The only adult figure known to exist in her life is her "favorite uncle".
  • Promotion to Parent: Implied to be the case with her sister, as Esmeralda takes responsibility in picking her up from a dentist appointment.
  • invoked Replacement Scrappy: A zig-zagged, in-universe example. The Big O initially chose Esmeralda as a top replacement for Orla to work in Odd Squad in the Mobile Unit department, but didn't hire her because she was constantly busy. She, as well as OSMU, are on friendly terms with her, but the latter group is hesitant about letting her join them in the Season 3 finale.
  • Running Gag: Her appearances involve her asking the Mobile Unit if she can join them on their adventures, only for her to realize she has other responsibilities that must come first and ask if she can join them on another date. When the agents shoot down her offer, she gives a nonchalant "Guess it didn't work out" and walks away. The only time she doesn't do this is in the Season 3 finale, where she offers to take the place of Opal following her departure from OSMU. When the agents act hesitant, she leaves them with a "Let me know!" before walking away.
  • Signature Instrument: While she can play a variety of instruments, she is most commonly seen with her flute, which she often uses to play the first ten notes of the show's theme song.

Big Red

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A civilian who is the inventor and builder of the Odd Squad tube system. He lived in Toronto back in 1870.

  • Fiery Redhead: He's a subversion, having red hair but being generally laid-back and mellow.
  • Gadgeteer Genius: He's the creator of the Odd Squad tube system, which he digs as a token of thanks to Oprah and O'Donahue for helping him get back his mailboxes.
  • Mistaken for Thief: He is initially suspected by Olga and O'Donahue as having stolen Oprah's fruit. However, he turns out to not be the culprit when he becomes a victim of the criminal's robbery and has some of his mailboxes stolen.
  • Red and Black and Evil All Over: Subverted. Big Red wears a red longcoat with a red belt and undershirt and wears a red-and-black fur collar, but isn't a villain nor is he evil — he's a victim of oddness who helps Oprah and O'Donahue out.
  • Tube Travel: He creates the Odd Squad tube system to repay Oprah and O'Donahue for helping him.
  • You Are the New Trend: Big Red having red hair and being the creator of Tube Travel for Precinct 13579's agents sparked a sort of unintentional trend where every tube operator at the precinct has red hair. Whether this is coincidence or it was intentional is unknown.

Coach Roberts

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The coach of the various Burly Bears sports teams in town whom Olive idolizes.

  • Beyond the Impossible: He's the coach of the Burly Bears basketball, soccer and hockey teams, among many other sports. How he has time to coach all of them is a mystery, but even in a show full of oddities, one can't deny that it's an impossible feat.
  • Butt-Monkey: He is a very frequent client of Precinct 13579, often having things stolen from him or being attacked by odd creatures.
  • Hologram: In "The Potato Ultimato", he appears as a hologram in the Cave of Your Least-Greatest Fears, begging Olive to help him out with his fifteen concurring games after all his players become hurt.
  • The Knights Who Say "Squee!": Downplayed. While he isn't a complete Fanboy like Otto, Coach Roberts enjoys Soundcheck and their music. Coincidentally enough, Olive, who idolizes him, ends up liking the band after also going to see a concert of theirs at the mall.
  • Mentor Archetype: It's revealed in "Disorder in the Court" that he is Olive's personal javelin coach, as she attends javelin practice with him.
  • Super Coach: He's very supportive of his teams. In the case of his basketball team, he manages to help them score a win when Olive takes the place of a few of his injured team members.

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