Millie Foss is the daughter of Digsy Foss and his husband in Barry Allen and Kara Danvers' dream movie musical world that was conjured by the Music Meister. She resembles Iris West. She was in love with Tommy Moran who was Mon-El's counterpart though their love was forbidden due to their parents being rival gangsters. She ceased to be when Barry and Kara were freed from the dream world by the real Iris and Mon-El.