Aunty Gertrude is a Main villain who works with the villains, Cuthbert Cringeworthy, Teacher, Headmaster, Janitor, Winston, Slasher Brown, Slasher Brown's Henchmen, Mr. Abercrombie, The Colonel, The Inspector, Captain Prefab, Clint Katzenberger, Sergeant Slipper, Hugo Trenchfoot, Olive, Vilhemina Slop Bucket, Mrs. Greature, Mrs. Creecher, Fatty Fudge, Aunty Fanny, Reg Trademark, Captain Trout, Sergeant Boot, Mrs. Duffel and Sir Fitz-Patrick Flush. She is voiced by Hinge and Bracket