First seen as one of the many students in Hawaii's Maunaloa Institute for International Studies, Stacy is the first girl to have the courage to ask the new transfer student out. She is also the only one courageous enough to try and escape her prison-like school.
Hiroto Nakadai, the handsome and mysterious transfer student usually keeps to himself. Encouraged by one of her friends Stacy goes ahead and shyly asks Hiroto to the Valentine Dance. After Hiro's abrupt decline Stacy runs away in shame.
In an alternate dimension where the protagonists of the book travel to, they spot Stacy trying to sneak away from their school. When Stacy is caught the kids take advantage of this to sneak inside.An announcement to gather in the courtyard is heard in the loudspeaker shortly after that. Mister Sturch, the man who appears to be in charge, enters the courtyard after a bloody Stacy is dragged for everybody to see. Sturch makes it his point that no one is to ever try and leave the school grounds, and to empathize this point he kills Stacy in front of the whole student body.