She is Frank Rogers’s original love interest and at the end of the movie: “The Detective Gang vs. L.O.V.E.”, they remain friends there. But afterwards, in the 3rd or 4th season of Secret Agent or Mole?, Frank and Sadie then starts to date and then later on they broke it off in 2nd season of "The Adventures of Secret Agent X". Her personality is that she’s honest, persistent, independent and gentle.