|Hair color||Medium reddish-brown|
|Occupation||Cafeteria lady at Norrisville High|
|Interests||Serving disgusting food to students|
|First Episode||Gossip Boy|
|Latest Episode||The Prophecy of Hat Sword|
|Voiced by||Grey DeLisle|
|"A ninja's hand is to give, not to take."
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Mrs. Dempsey is the cafeteria lady at Norrisville High.
In "Gossip Boy", she is seen grinding up a roadkill squirrel to make tacos for taco Tuesday. She is also seen zombiefied in "Night of the Living McFizzles". When she de-zombiefied, she vomited into a pot and continued cooking the same pot. She also briefly appeared in "Silent Punch, Deadly Punch". Most of the students are disgusted by her cooking but Howard is only who seem to like her cooking. She manages to make chili sauce that is able to melt metal.