|Occupation:||Park Manager (formerly)|
|Voiced by:||April Stewart|
|Appears in:||"Benson Be Gone"|
|Latest appearance:||"Exit 9B"|
Giant Susan is the main antagonist appearing in the episode "Benson Be Gone". After everyone did not follow her orders, the groundskeepers cause Susan to go crazy, making a giant version of herself burst out of the ground and eat her. The demoness threatens everyone she encounters, even going so far as to crush Mr. Maellard. She is later defeated by Leon when he breaks off her high-heels with Mr. Maellard's car, making her trip and fall back into the hole from where she emerged, eventually dying from fire inside the hole. She was eventually revived by Garrett Bobby Ferguson Jr., but sent back into the portal.
- In Benson Be Gone, Giant Susan had a stock roar, however, in "Exit 9B", she has the roar of Godzilla, specifically one of the roars recorded by Frank Welker for the infamous 1998 American remake by Roland Emmerich and Dean Devlin.