Prudence Prufrock is the tertiary antagonist of Scooby-Doo! The Mystery Begins. She and Ezekial Gallows were the founding facility of Coolsville high and were both killed by the Coolsville flood.
She and Ezekial were about to open the doors to their new school when all of a sudden a flood destroyed all of Coolsville, killing them both.
Scooby-Doo! The Mystery Begins
Hundreds of years later their ghosts came out of their graves in the Coolsville Cemetery, scaring Scooby-Doo. Later, she and Ezekial's ghosts came out of an old book in the library of Coolsville High School and chased the gang away. They then scared everybody in the gym. Once defeated, She told the gang that she and her friend were under the Dark Specter's control.