|Real name:||Mary West|
|Portrayed by:||Cree Summer|
In Young Justice #0: "Stopover", Mary and Rudy listened as their son recounted how he had gone on a mission with Robin and Aqualad, and freed Superboy. She welcomed their new guest, and allowed him to stay at the house. Fed up with her son's inactivity, she urged Wally and Superboy to go outside. She gave him a credit card that had come in the mail from Batman.
In "Downtime", The Wests hosted a birthday party for Jay Garrick. After being impressed by Barry Allen using speed to politely take their plates, she embarrassed Wally by saying his speed didn't compare to Wally's when it came to chores, to which Joan Garrick sympathized. Mary then had to call out her son for eating all the ice cream.
In "Misplaced", after having been trapped in a dimension without children, Rudy and Mary were happily reunited with Wally, who had helped stop Klarion's plan.
In "Coldhearted", on the morning of Wally's sixteenth birthday, Mary made him his favorite breakfast. She turned on the television, where Iris West-Allen congratulated her nephew live on-air. Rudy and Mary watched Iris West-Allen report on GBS News that the last ice fortress had been destroyed, and that Queen Perdita had died on the operating table despite the best efforts of Kid Flash and the Seattle Medical Center.
- Young Justice #0: "Stopover"
- "Misplaced" (no lines)