Olympia is an 11-year-old recent grad from Odd Squad Academy. Smart, perky, and easily excitable, but never annoying, She is a fangirl who is passionate about Odd Squad and loves to come to work each day. Open and friendly, she'll tell you her life story as soon as you meet her, whether you want to hear it or not. Olympia is a die-hard optimist and believes in everyone and everything. She loves Odd Squad history and is a huge fan of agents Olive and Otto.
Olympia is very energetic and friendly. She loves working, but she also enjoys having fun and usually has an optimistic outlook on life. She loves to help others and whenever she sees that someone is upset, she does her best to cheer them up. She has the habit of acting like a workaholic, she treats her job seriously and with dignity, but also an obsession. She is also very organized and somewhat disgusted by disorganization.
Otis is Olympia's partner and best friend. When Olympia first meets Otis in "First Day", Otis is shy towards her, which causes Olympia to think he doesn't like her. In the middle of the episode, Otis tells Olympia he wants her to be his partner and that "I've said more words to you than anyone in my life". Over the course of the season, Otis gets over his shyness and is bolder and more confident around Olympia and others, but still feels awkward and somewhat embarrassed of Olympia's antics.
In "Good Egg Bad Egg", Olympia refers to Otis as "a flip-flopper", meaning he never has one solid opinion and is always changing his mind about things. In Otis' defense, Otis says Olympia always has to have the last word; Olympia disagrees directly after Otis states such. After apologizing, they start fighting about who is luckier to have each other as a partner.
In "Rookie Night" when Otis and Olympia are tracking down the other agents celebrating Rookie Night, they eventually miss it and Olympia says it is Otis' fault she had the best Rookie Night ever going through all of the hallway doors in Headquarters together with him.
In the Season 2 finale "Odds and Ends", when Otis asks to have a private talk with her, at the end of their talk, Olympia tells Otis that the best part about working at Odd Squad is that she gets to work with her best friend while Otis tells Olympia the same thing.
Oona is Olympia's co-worker and close friend. Their personalities are somewhat alike while Olympia is much more optimistic. In "The Ninja Situation" the two are seen singing together, and in "Ocean and the Fly", Olympia sings with Oona while she is in a fly's body. Oona is mostly seen with Olympia if Otis is there too; they serve as an effective trio in a lot of episodes, such as "Odd Squad: World Turned Odd".
The only times when they disagree on something is in "Olympia's Day" (when Oona wants a piece of Olympia's new room) and in "The Cherry-on-Top-inator" (when Olympia and Otis are trying to keep Oona from destroying the Cherry-on-Top-inator gadget).
Ms. O is Olympia's boss. Both are on friendly terms with each other. Oftentimes, it doesn't seem that way because of Ms. O's tough personality and seriousness, as seen in "O is For Opposite" (when Olympia is trying to take pictures of herself and Ms. O, but Ms. O tries her best to be hidden from the camera).
In "Odds and Ends" when Ms. O is all packed up to leave Precinct 13579 to work at The Big Office, after giving Oona and Otis a final word before she leaves, she tells Olympia that she taught her to always look on the bright side and the way she loved Odd Squad made her love it even more. She also tells Olympia that it's been the honor of her life to work with her.
In the OddTube episode, "Interview with Olive", Olympia gets to know a little bit more about Olive. When Olympia asks Olive to give her some tips on how to be more like her, Olive tells Olympia that she shouldn't be like her and she should be herself. She also says she's seen Olympia in action and she is one of the best agents she's ever seen and that she has a bright future at Odd Squad. She also asks Olympia to believe in herself because Olive herself believes in her, which causes Olympia to explode with joy.
Otto is another one of Olympia's idols next to Olive. In "First Day" when Olympia asks Instructor O if she is going to be the "new Olive", Instructor O tells her that technically she is the new Otto, since Otis is more of an Olive than an Otto. However, Otto and Olympia are rarely seen together; Olympia is never close to Otto except in "Odd Squad: The Movie". She also greeted him via phone in "Interview with Olive".
Olympia knows a lot about Agent Orla and the Mobile Unit, albeit she does not work with them due to the fact that she is working at Precinct 13579, while Orla is working in the Mobile Unit van and traveling around the world.
In the first Season 2 episode of OddTube, "Welcome to OddTube Season Two!", Orla says that Olympia's kind words mean a lot to an agent who has done so many noble deeds. Hearing her say that, Olympia says that she loves the way Orla talks. Olympia also tells Orla to be herself and that she'll do a great job by doing that, passing on the words she received from Olive in "Interview with Olive". Orla tries her best to hide her excitement from Olympia, but after she hangs up, she explodes with joy.
- "Hobbies: Everything. If there is anything I am missing, please please please tell me immediately and I will do that too."
- "'O' to the 'lymp' to the 'ia'!"
- "When I say "Hello!" you say "Yello!" Hello!"
- "Olympia's new way of answering the phone, Olympia speaking!"
- "...And then we left headquarters and came here."
- "I'll be... Your Worst Nightmare! Too much right?"
- "The best part is the moment before you make the chart. Ooh, the anticipation!"
- "There's a light at the end of the tunnel. Throw me to the wolves and I'll return leading the pack!"
- "OddTube will start now!"
- ”Dangerous. Or, ‘but that’s so dangerous!’”
- "The phone was invented in 1876, Olympia speaking!"
- Olympia is eleven years old.
- She is the second main character with a ponytail tied up (the first being Agent Olive).
- Her favorite song is the Odd Squad Theme Song.
- Her first pet was a guinea pig.
- Her favorite color is all of them.
- Olympia and Ohlm are the only agents shown onscreen in their own house.
- She is fluent in French as well as English.
- Her friend from the Academy is named Orla, and is in the photograph on her desk.
- Her favorite toe is the pinkie toe.
- She loves drawing.
- She wrote "The O Song" in order to memorize all of the Odd Squad agents' names.
- Her outside-of-work friend is named Amanda.
- She LOVES Pandas.
- She carries a Kazoo around in her pocket.
- Her favorite season is winter.
- Her badge number is 91.
- She is the host of her own online video series called "OddTube".
- Originally, her character was named Odelia (not to be confused with this Odelia).
- She has a ham and cheese allergy.
- She is the second main character to appear with glasses, the first being Agent Oscar.
- The actress who plays Olympia, Anna Cathcart, also wears glasses in real life.
- In "There's No "O" In O-Bot", she mentions that she took piano lessons.
- "First Day" (Debut)
- All of Season 2 except:
- "Welcome To Oddtube"
- "What's Inside My Desk"
- "Villains and a Puppy"
- "See It, Solve it"
- "Viral Video with Dr. O"
- "Your Questions"
- "The O Song"
- "Coach O's Life Tips"
- "The Creature Room"
- "Interview with Olive"
- "Meet Agent Olo"
- "Let's Get Historical"
- "Your Questions Part 2"
- "How Odd is Odd Squad?"
- "Otis Fills In" (Cameo, still image)
- "The Ball Pit"
- "Your Gadgets + Tubes"
- "20th Anniversary Video"
- "Welcome to OddTube Season Two!" (Voice only/still image)
For Olympia's appearances gallery, go here.