Dr. Leslie Thompkins (Voiced by Diana Muldaur) is a close friend and medical colleague of Thomas Wayne. Leslie serves as a surrogate parent to his son Bruce after his parents are murdered, and later becomes a confidant in his crusade as Batman. In addition to being one of Batman's allies, Leslie is also a renowned medical professional who has dedicated her considerable skills toward helping Gotham City's less fortunate. She is depicted as a lifelong friend of Bruce Wayne, having attended medical school with his father, Thomas. She knows Batman's secret identity and serves as his on-site doctor, confidentially treating injuries that Bruce Wayne could not be publicly known to have without raising suspicion.