Beth Chapel

Beth Chapel (also known as Doctor Midnight) is the name of a fictional superhero in DC Comics. Being a successor of the original Doctor Mid-Nite, Charles McNider. 
Beth Chapel is portrayed by Anjelika Washington in the DC Universe series "Stargirl".
Fictional character biography.
As the aging McNider spent less time in action, Beth Chapel, a medical doctor, stepped into the role of Doctor Midnight. Beth Chapel was a native of Orangeburg, South Carolina, with a pastor father, a mother who sang in the church choir, and four brothers. Chapel first appeared when Jade of Infinity, Inc. was rushed to her hospital for treatment after encountering Mister Bones' cyanide touch. During the onset of the "Crisis on Infinite Earths", Beth was blinded by an oxygen explosion, only to be rescued by Hourman's son Rick Tyler, who had taken McNider's drug that enhances ability to see in the dark. Beth used the formula to similarly treat her blindness, and she and Rick assume the mantles of their predecessors as Doctor Midnight and Hourman, with her mother crafting a super hero costume from a choir robe. Along with a new Wildcat, Chapel and Tyler applied for membership in Infinity, Inc, eventually gaining admission; however, the association was short-lived, as Infinity, Inc. disbanded shortly thereafter, though Chapel and Tyler began a romantic relationship during their tenure.
Doctor Midnight and Wildcat were subsequently recruited by the U.S. government for a mission to defeat the supervillain Eclipso, only for Chapel to die on the mission along with Wildcat, the Creeper, Commander Steel, Peacemaker, and Major Victory.
During the events of the "Watchmen" sequel "Doomsday Clock", Beth Chapel was returned to life alongside the rest of the restored Justice Society of America and the Legion of Super-Heroes thanks to the influence of Doctor Manhattan. She now sports a more traditional costume resembling that of McNider and Cross. Following the fight against Black Adam's group and the foreign superheroes, Doctor Mid-Nite is mentioned to have opened a metahuman medical clinic called the All-Star Clinic where Ronnie Raymond is receiving treatment.
Other versions.
In the new Earth-2 created in the wake of "Infinite Crisis" and 52, a version of Beth Chapel is shown to be a member of the Justice Society Infinity.