Ashley A. is a spoiled, snobby and usually mean nine year old rich girl. Her primary interests include fashion, boys and gossip with her best friends. Ashley met the rest of the Ashleys one day when they were in kindergarten at a playground where all their hats they've been wearing were blown off their heads and when they went to get them, they bumped into each other and introduced themselves, becoming friends. Because they were all wearing purple that day, a tradition was formed among the girls to all wear purple on the anniversary of the day they met, thus calling it Purple Day. Ashley A., was once kicked out of the clique for accidentally forgetting to wear purple on 'Purple Day', although she returned to the clique at the end of the episode.
Despite being vain and stuck-up, she has shown to be nice on a few occasions. During the time where kicked out of the clique, she befriended Gretchen and became friends with her. On many other occasions, she has also sought help from T.J. and his friends, who she usually socially snubs.
Ashley lives with both of her parents. Her mother, who has only been seen in "Parents' Night", has been shown to look and act very similarly to her. Her father was never shown onscreen, but has been mentioned a few times. He often spoils her. She has a seven-year-old brother named Tyler, who is a member of the similar rich boy clique, the Tylers and five-year-old sister named Brittany, who doesn't appear to be in a clique with the other Brittanys.
- Her voice actress, Anndi McAfee, and Ashley Boulet's voice actress, Francesca Smith, are also known for doing best friends Helga Pataki (Smith) and Phoebe Herderyl (McAffee) on Nickelodeon's Hey Arnold!, which series creators Paul Germain and Joe Ansolabehere worked on the first season before leaving for The Walt Disney Company.
- In "The Great Can Drive", she's in Miss Furley's fourth grade class with the other Ashleys. However, in certain episodes, she and Ashley B. are in Miss Grotke's class instead (Ashley Q. and Ashley T. are more commonly seen in her class). Both she and Ashley B. are in Miss Finster's class in Recess: Taking the Fifth Grade.
- In the traditional cel-animated episodes, her hair is golden blonde, though in the digital ink-and-paint animated episodes and movies, her hair is yellow-blonde.
- In "Rumor Mill", she mentions that she's gotten a nose job.
- In "Outcast Ashley":
- She says this about her father: "Daddy always said beauty, style, and attitude would prevail."
- Gretchen teaches her about the Earth's orbit, and Ashley says: "The Earth revolves around the Sun? Daddy always said the world revolved around me."
- It is mentioned that she is a Gemini, meaning that her birthday falls in between May 20 and June 21.