Grandma Gooey
Cheery woman who happily bakes cinnamon rolls while kids cheat, cry, and generally torture their care-takers on their way to King Kandy's Castle. It is alleged that Ms. Gooey was having a decades-long affair with Gloppy on Chocolate Mountain... which it is believed ultimately led to Gramma Nutt's sudden disappearance from Chocolate Mountain in late 2009.
Lily's mom thought Grandma Gooey's specialty was a truffle rather than a cinnamon roll, but Lily's mom went to ISU so it is most likely Lily is correct in this important matter.