Character tropes go on the Hatchetfield character sheets. The characters from The Guy Who Didn't Like Musicals are listed below with the character page they are currently on. Characters in boldface are those listed in the show's credits.
- Main Hatchetfield Residents
- Main characters of The Guy Who Didn't Like Musicals: Paul Matthews, Emma Perkins, Ted Spankoffski, Charlotte Sweetly, Bill Woodward, Professor Henry Hidgens
- Main characters of Nerdy Prudes Must Die: Peter Spankoffski
- Hatchetfield Families
- Main family members: Sam Sweetly, Alice Woodward
- Other families: Zoey Chambers
- Other Hatchetfield Residents
- Businesses and organizations: Nora, Ken Davidson, Melissa, Dan and Donna
- Government: Doug
- Schools: Deb
- Other residents: Man in a Hurry, Homeless Man, Greenpeace Girl
- Hatchetfield Outsiders
- PEIP: General John MacNamara, Colonel Schaeffer
- The Black and White
- Servitors: The Hive
