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She is known to be the master of martial arts and she teaches Arnold self-defense from a mugger. She helped Arnold to save his treehouse from Big Bob, and helped him save the turtles from torment by children. She also try to save Arnold from being stuck in the subway bus.
She is voiced by Tress MacNeille also voiced Charlotte Pickles.
Gertrude usually acts younger than she appears. She is a martial arts master according to Gerald. She taught Arnold self-defense in "Mugged" and helped him save a turtle from constant torment from the elementary school children in "Field Trip" episode. She is often the only person who understands Arnold. She is very upbeat, and takes any situation with the same enthusiasm as any other. This was best shown in "The List," where Arnold failed attempts at having "the perfect Saturday" are compared with Grandma Gertie's attempts to get her piano moved into the house. In the end, she has the piano put on the roof (where it stays for the rest of the show), and she and Arnold share a song about how you shouldn't let the little problems get you down.
She has a habit of mixing up holidays in holiday episodes of the show. For example, during Arnold's Christmas, she says "Happy Thanksgiving everybody!" She plays the piano; and during holiday episodes, plays seasonal music, but confuses it; she played Christmas music in the Thanksgiving episode.
- Her and Phil's relationship is similar to Arnold and Helga's when she and Phil were kids.
|The Loud House|
|Rise of the Teenage Mutant Ninja Turtles|
|Rugrats / All Grown Up!|
|The Ren & Stimpy Show|
|Rocko's Modern Life|
|Aaahh!!! Real Monsters|
|The Angry Beavers|
CatDog • Winslow T. Oddfellow • Lola Caricola • CatDog's Parents • Roachie • Mervis • Dunglap • Randolph Grant • Mr. Sunshine • Murray "The Mule" Marconi • Mean Bob • Fred the Flying Fish • Gorilla • Dunlapia • Mr. Sunspock • Mervania • Randolphoran • Lolita 7 • Tallula Headbank
|The Wild Thornberrys|
|As Told By Ginger|
|The Fairly OddParents||
Timmy Turner • Wanda • Cosmo • Poof • Sparky • Chloe Carmichael • Jorgen Von Strangle • Mr. Turner • Mrs. Turner • Tootie • Chester McBadbat • AJ • Tooth Fairy • Trixie Tang • Veronica • The Crimson Chin • Alternate Crimson Chins • Crash Nebula • Catman • Turbo Thunder • Flappy Bob • Mark Chang • Mama Cosma
|The Adventures of Jimmy Neutron: Boy Genius||
Jimmy Neutron • Cindy Vortex • Carl Wheezer • Sheen Estevez • Goddard • Libby Folfax • Judy Neutron • Hugh Neutron • Granny Neutron • Zix, Travoltron and Tee • Nick Dean • Betty Quinlan • Ultra Lord • Jet Fusion
|My Life as a Teenage Robot|
|Avatar: The Last Airbender|
|Tak and the Power of Juju|
|Back at the Barnyard|
|The Mighty B!|
|The Penguins of Madagascar|
|Fanboy & Chum Chum|
|Kung Fu Panda: Legends of Awesomeness|
|Sanjay and Craig|
|Pig Goat Banana Cricket|
|Welcome to the Wayne|
|Corneil and Bernie|
|The Secret Show|
|Dora the Explorer|
|Ni Hao, Kai-Lan|
|Eponymous Nick Jr. Heroes|
See Also: Cartoon Heroes