Izumi Maki appears in the film Martian Successor Nadesico: The Motion Picture - Prince of Darkness. Several years after the events of the television series, she has left her role as a frontline pilot. At the beginning of the movie, she is working as a bar hostess, making a living as a musician. She is known to be able to play the ukulele and sing, though her singing ability has been described as less than accomplished.

Information regarding her specific background prior to the film indicates she carries personal history marked by loss, as she has previously lost two significant others, one to disease and one to an accident. Her personality remains highly distinctive, defined by a penchant for constant wordplay and darkly humorous observations. She is an incurable punster, delivering jokes and innuendos frequently. Her outward appearance matches her eccentric demeanor; she has long dark hair and pale skin, which gives her a somewhat gothic and unsettling presence.

Her motivations in Prince of Darkness are tied to her past service on the Nadesico. When former crewmates recruit her for a new mission, she agrees to rejoin them. In this film, her role reverts to that of an Aestivalis pilot, fighting alongside her former comrades. Her key relationships are with her fellow original pilots, Hikaru Amano and Ryoko Subaru, with whom she shares a long-standing camaraderie. She continues to engage in teasing them, often about their personal lives. No reliable direct information exists covering her development arc throughout the motion picture or a detailed list of her notable abilities as distinct from the television series.