Helen

4th Grade Female Cat is an unnamed character in the show. She has always been used as a background character and has yet to have a speaking role. Her personality is unknown and her most significant role was in the episode D.W., Bossy Boots, when she attended Emily's birthday party. The relationship between her and Emily is a mystery though it's most likely she was just invited. She does hang out with mostly fourth graders, but is seen hanging out with third graders like Jenna.

She is also in the same fourth grade class as Prunella as seen in the episode Prunella's Special Edition. She is most of the time seen either in the hallways or at lunch. Most of the time when she appears she's often with her friend 4th Grade Female Rabbit. They most likely also went to the same kindergarten class as seen in a picture in the episode Brain's Shocking Secret and is probably where they first met each other.

Appearance
4th Grade Female Cat is a cat with a brown complexion. She wears a cream colored collared shirt, yellow sweater with long sleeves over her cream colored shirt, purple overalls with pink pockets over her sweater, long pink socks, and pink and white sneakers. She has been seen with a yellow backpack and then a green backpack. Later on in the series she has been seen with a blue colored backpack.

She also wears an orange sweater with a yellow "P" on it.She has black hair that is the same length as D.W. and Maria and has a yellow backpack. When she was in kindergarten she wear a sweater with sleeves and buttons, a gray dress, and white loafers.

In the episode Arthur and the Real Mr. Ratburn she wore a beige shirt, pink shorts, long white socks, and pink and white sneakers during the basketball game and even was seen wearing the same clothes during the puppet show later on in the same episode. In the episode, Love Notes for Muffy she is seen wearing pink shorts and a pink shirt.

Trivia

 * She is in the same class as Prunella Deegan though it's unknown if she's friends with her or not.
 * She is a fan of Henry Skreever along with her friend and Prunella.
 * She most likely met her friend 4th Grade Female Rabbit at some point during kindergarten or at the Elwood City Preschool.
 * During her 3rd grade year she was in Miss Sweetwater's class as seen in the episode Arthur and the Real Mr. Ratburn. However in the episode Tipping the Scales she was seen with Binky during last year's performance at Crown City, which means she was possibly in Mr. Ratburn's class during her 3rd grade year.
 * While she has never spoken before she, her friend and 3rd Grade Male Dog can be heard laughing at the information D.W. gave them about Arthur.
 * According to what Arthur said in the episode D.W.'s Imaginary Friend 4th Grade Female Cat is apparently D.W.'s friend.
 * In the episode, Love Notes for Muffy she was incorrectly mistaken as a 5th grader along with some or all of her classmates.