Louis Tully (Rick Moranis) is another nerdy accountant who gets the gorgeous girl, even if both have to be possessed by demons to make the coupling take place. In Louis’ case, the possession comes just in time to enliven the dull party he’s throwing at his apartment (well, that’s what kind of party you get when you invite clients instead of friends, for tax purposes). Moranis is hilariously, hopelessly dweeby, both before and after he becomes the Keymaster of Gozer, and the sight gag of his liplock with the Gatekeeper (the equally otherworldly Sigourney Weaver) is one of the 1984 movie’s more impressive spectacles.
Louis returns in the 1989 sequel, free of demons but still alluring to secretary Janine Melnitz (Annie Potts). Again, he plays a small role in helping the actual ‘busters (Bill Murray, Dan Aykroyd, Harold Ramis, and Ernie Hudson) save New York City (and the world) from spiritual apocalypse. Sometimes, it just helps to be in the wrong place at the right time.