Allegra Geller is a fictional character from the 1999 film eXistenZ, directed by David Cronenberg. She is a game designer known for creating immersive virtual reality experiences. In the film, Allegra becomes embroiled in a conspiracy that challenges the boundaries between reality and the virtual world. Throughout the story, Allegra's character explores themes of technology, identity, and the impact of gaming on human experience. Her journey raises questions about the nature of reality and the ethical implications of advanced virtual reality systems, making her a central figure in the film's narrative.