Ya know what's a classic 80s movie? Revenge of the Nerds.
Half of the Kappas who have died so far were also Gigi's agents - that's *why* she brought them in. And for someone stuck in the 80s, Revenge of the Nerds sounds like a cunning plan, when you're insane. Various of the Geeks were Gigi's minions and did early killings, taking advantage of the hazing rituals (which Gigi would know all about).
There's a Hero (rhymes w/ Feet or Ness) who found out about the plot, and they started taking out Gigi's Agents, while also wearing the Red Devil costume. (But they're doing it for *Good*, so...um. Still Murder.)
This is actually the story of a killing field b/w psychos and murderous Heroes. The End.