— Agent O'Donahue
|Friend(s)||Ms. O, '80s Ms. O|
|Enemies||Equal Evan, Patternista (Formerly)|
|Debut||Totally Odd Squad|
O'Donahue was Ms. O's partner after his old one, Olga went to the odd side. He was Ms. O's partner up until the 1980's when he and Oprah (Ms. O) failed to solve a case featuring a mysterious villain Equal Evan. He then quit, but returned 30 years later to help his partner finally solve the case. Now he pretends to be retired while secretly solving cases for Ms. O.
- "Oh Yeah!"
- "Don't you like it when I bring you flowers?"
- "I never took it off."
- " Oprah, the day we don't have time for music is the day we don't have time for time."
- "But all the noises mixed together it's like, eugh! Gag me with a spoon!"
- "Olga! Say it ain't so."
- Totally Odd Squad
- The One That Got Away
- Fistful of Fruit Juice
- O vs. the Ballcano
- Happy Halfiversary
- Behind Enemy Mimes
- Odd Squad: World Turned Odd (Alternate timeline)