Missy/Mom
Background
Missy is a resident of San Dimas, California. Her husband is Captain Logan, her ex-husband is Mr. Preston and her step-sons are Bill S. Preston and Ted "Theodore" Logan.
During the events of Bill & Ted's Excellent Adventure (1989) played by Amy Stoch
Missy/Mom drives up and offers Bill and Ted a ride. She drops off Ted so he can get his books. While Bill and Ted are studying, Missy/Mom brings them food. Mr. Preston walks into Bill's room and kicks him out so he can have sex with Missy/Mom. Missy/Mom makes Bill do his chores and he with the help of Ted and the historical figures finish them all. Later, Missy/Mom drops off Bill and Ted while Napoleon waits in the car.
During the events of Bill & Ted's Bogus Journey (1991) played by Amy Stoch
At Bill and Ted’s apartment for Joanna and Elizabeth’s birthday party, Missy greets Colonel Oats and then kisses Captain Logan in front of Mr. Preston who she divorced to marry Captain Logan. Later, Bill and Ted as ghosts go to where Missy, 1st Seance Member, 2nd Seance Member, 3rd Seance Member, 4th Seance Member, "Ugly" Seance Member, and "Stupid" Seance Member are having a séance. Bill and Ted tell them they were murdered and Missy opens up a book on The Riddance of Evil and casts a spell which sends Bill and Ted slowly to Hell.
Evil Bill and Evil Ted drive to Captain Logan’s house and crash their car and fly through the house window while Missy, Joanna and Elizabeth are sitting on the couch. Evil Bill and Ted grab Joanna and Elizabeth and try to forcibly make them go with them but are stopped by Missy. Bill then uses evil breath to knock Missy unconscious. The séance members including Missy are watching tv while Kate Axelrod reports live from the San Dimas Civic Auditorium for the Battle of the Bands. The Wyld Stallyns play and win the Battle of the Bands and Missy eventually divorces Captain Logan and marries De Nomolos.