Grandma Gertie

Gertie (also called Pookie by Phil) is the major character of the Nickelodeon animated series Hey Arnold. She is Arnold's wise grandmother and Phil's wacky wife.

She is known to be the master of martial arts anf 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.

Trivia

 * Her and Phil's relationship is similar to Arnold and Helga's when she and Phil where kids.