Gretchen is one of the Firestorm Girls from the movie Phineas and Ferb Across the Second Dimension. She spends her time resisting evil in her dimension.
Gretchen has short red hair and blue eyes with glasses. She wears a green beret, a silver shirt and a brown sash and pants. She wears black boots and gloves.
- She is the only Firestorm Girl besides Isabella to speak in the movie.
- She appears to be the smallest.
- She is the only one to wear glasses.
- She is the only redhead.
- In one deleted scene, she was helping stop the normbots from taking over the first dimension.
- In battles, in particular against robots, she is very skillful with the weapons that can easily destroy the normbots.