Gertrude

"Hello Timmy! Let Aunt Gertrude pinch those chubby cheeks of yours!"

- Aunt Gertrude

"I hope she means my face!"

- Timmy Turner

Aunt Gertrude Turner is the sister of Pappy, the aunt of Mr. Turner and the great aunt of Timmy. When Timmy wishes a more exciting video game in the episode Power Mad, a "submarine version" of her house is shown, and even a submarine version of her is presented as a lobster. She likes to pinch Timmy's cheeks.

Description
Aunt Gertrude has only appeared as a lobster monster in the series, as the boss of the first level in a challenging video game Timmy wished up. From her appearance and mannerism of speaking, she is likely elderly. It should also be noted that Vicky also knows her, because she recognizes Gertrude's house and the fact she is Timmy's aunt.