Zero Two is a fictional character in Darling in the Franxx, a Japanese science fiction romance and action anime television series produced by A1 Pictures, Trigger, and CloverWorks.[9] She was designed as the most prominent character and icon of the series. Zero Two is an artificially-created life form who aspires to become fully human, and an elite pilot with an infamous reputation as the Partner Killer. She is well known for addressing Hiro, the protagonist, by the eponymous term darling.