Joan Garrick is an elderly, Caucasian female with short, white hair and blue eyes. Similar to her husband, Joan appears well-preserved despite her old age. She wears a brown ring on her left ring finger – presumably her wedding ring.
Joan attended her husband's birthday party at the home of Rudy and Mary West. When Mary said her son wasn't as fast as Barry Allen (the current Flash) at clearing the table, Joan said that Jay wasn't either. Before he could object, she said she knew that he was a retired speedster, and since it was his birthday she wasn't going to argue with him about it.