Famous movie actress. In January 1940 Clark Kent and Lois Lane witness a filming inside the Collossal Films Studios where Dolores was acting. When Clark foils an assassination attempt, she accepts to be interviewed, but by next evening refuses to talk to him.
Later, she announces she is quitting acting, as she has acquired enough money to meet her goals. On a retirement party on her Private Yacht she kidnaps a bunch of celebrities, kills one in cold blood, and broadcasts her demands via the ship's radio. Tracing the 5 million ransom to a submarine, Superman finds Dolores and recognizes the Ultra-Humanite's "evil blazing" gaze on her eyes. When Ultra is killed on their last encounter, his assistant revives him "via adrenalin". His recovery is temporary, so he captures Dolores Winters "and places [his] mighty brain in her young vital body." Ultra manages to escape underwater (Act No. 20, Jan 1940).
In May 1980, the Ultra-Humanite, still in Dolores body, captures Bruce Wayne planning to take over his body, but is foiled by Lois Lane (SF No. 201/2: "The Enigma of the Empty Elevator!").