Scooby-Doo and the Ghoul School is the Third Scooby Doo Animated Movie air on TV.
- Miss Grimwood- The headmistress of the school.
- Sibella- The daughter of Dracula, she has the ability to change into a bat at times.
- Elsa Frankenteen- The daughter of Frankenstein, she is also very strong.
- Winnie Werewolf- The daughter of a werewolf.
- Phantasma- The daughter of a ghost, she also plays the organ.
- Tanis - The daughter of a mummy and the youngest of the girls.
- Colonel Calloway- The head of Calloway military school.
- Tug Roper- Considered to be the leader of the cadets.
- Miguel- The inventor of the group.
- Jamal Williams- The tallest and most skilled of the cadets.
- Grunt- The biggest member of the cadets, despite being overweight, he is very athletic.
- Baxter- The smallest member of the group.