Born Lenore, her childhood was unhappy; her parents divorced after her mother discovered that her father was a pedophile, and Lenny spent a lot of time in the care of her grandmother, for whom she was named. In high school, she realized that she was a lesbian, and sometime after that she ran away from home. Lenny spent several years as a hustler, getting arrested 13 times before becoming a patient at Clockworks.
Lenny was killed by Syd’s uncontrolled teleportation powers, but she’s kind of alive without a body. Not a ghost. It’s confusing.