|"3rd Grade Female Rat" is not an official name.|
|3rd Grade Female Rat|
|Cartoon debut||D.W., Dancing Queen|
"3rd Grade Female Rat" is an unnamed third grader who made her first appearance in the episode "D.W., Dancing Queen".
Not much is known about her since she didn't speak and was in Arthur's imagination, who at the time was daydreaming about his friends being teachers. It's unclear if she attends Lakewood Elementary School, and she has not reappeared since this episode.
3rd Grade Female Rat is a rat with a brown complexion. She wears a white shirt, a red vest, a black skirt, white socks, and black loafers. She has long, brown hair.