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1. Grease
Potsie is a character on TV's Happy Days (not to be confused with Putzie, a minor character only in the movie version of Grease)
Kenickie
Frenchie
Doodie
Potsie
2. A Strange Loop
Tevin Campbell is an R&B singer, songwriter, and musician. Tyler Perry is a recurring character portrayed in a satirical light. The main character, Usher, has no relationship to the R&B singer of the same name.
Tevin Campbell
Inwood Daddy
Tyler Perry
Usher
3. Guys and Dolls
Lt Schrank is a character in West Side Story.
Sgt. Sarah Brown
Big Jule
Nicely-Nicely Johnson
Lt. Schrank
4. Rent
Rainbow Johnson is a character on TV's "black-ish"
Mimi Márquez
Rainbow Johnson
Benny Coffin
Tom Collins
5. Avenue Q
Crazy Harry is a Jim Henson Muppet. Christmas Eve is one of the main human characters, originally played by Ann Harada. "Gary Coleman" is a major character, usually played very loosely by a woman.
Crazy Harry
Trekkie Monster
Christmas Eve
Gary Coleman
6. MJ The Musical
Reggie Jackson was a legendary baseball player.
Joe Jackson
Michael Jackson
Reggie Jackson
Randy Jackson
7. Little Shop of Horrors
Like the Ronettes, the Crystals, and the Chiffons, the Shirelles were also a '60s girl group, but not one of the Little Shop "urchins".
Ronette
Chiffon
Crystal
Shirelle
8. Once Upon a Mattress
Far from spewing balderdash, King Sextimus in Once Upon a Mattress is silent for almost the entire show.
Prince Dauntless
Princess Winifred
Queen Aggravain
King Balderdash
9. The Music Man
Agnes Gooch is a character in the Jerry Herman musical Mame, from the same era.
Agnes Gooch
Marcellus Washburn
Winthrop Paroo
Harold Hill
10. Hadestown
In Hadestown, the life of the party is Persephone.
Hermes
Hades
Dionysus
Eurydice
11. Hamilton
Many revolutionary-era American figures are portrayed in Hamilton, but not Ben.
Thomas Jefferson
Ben Franklin
James Madison
George Washington
12. Into the Woods
Into the Woods interweaves many famous fairy tales, but not Hansel and Gretel.
Rapunzel
The Baker and The Baker's Wife
Cinderella
Hansel and Gretel
13. Ragtime
One of the three featured families in Ragtime is only ever known by their generic familial names. Grandmother is not one of them. (Technically, Mother is also Older Sister, though never referred to as such.)
Grandmother
Mother
Father
Younger Brother
14. West Side Story
There are lots of Fernandos out there, but not in West Side Story.
Fernando
Action
Chino
Diesel
15. Fiddler on the Roof
Yentl the title character of a 1983 musical movie, played by Barbra Streisand.