Cave Johnson is a fictional character from the video game series Portal, developed by Valve Corporation. He is the founder and CEO of Aperture Science, a research facility known for its advanced technology and questionable ethics. Johnson is known for his charismatic and often humorous personality, as well as his ambitious vision for scientific progress. In the game, Cave Johnson's voice is heard through pre-recorded messages, providing players with insights into the company's history and its experiments. His character embodies the spirit of innovation and the sometimes reckless pursuit of knowledge, often leading to unintended consequences in the facility's experiments.