Leslie Thomkins is a dedicated doctor who makes it her mission to use her medical talents to help anyone in need, even criminals. She does her best to help those who cannot afford medical treatment elsewhere.
She was a close friend and colleague of Thomas Wayne and as such has also forged a friendship with his son Bruce. She had a clinic in Gotham City, but it ended up being a part of the Arkham City prison, where it would eventually fall victim to a flood.
- In the comics, she is one of the few people that Batman trusts his secret identity with, but it is unknown if this is the case in the Arkham universe.