"You are not a good person. You know that, right? Good people don't get up here."

"I was so bored, I actually read the entire literary canon of the human race. Ugh. I hope YOU didn't write any of them."

"Who's gonna make the cake when I'm gone? You?"

GLADOS (Genetic Lifeform And Disk Operating System) is an Artificial Intelligence created by Aperture Science, and the primary antagonist of the Portal series. She is the main antagonist throughout Portal and the first half of Portal 2's single-player campaign. As the overseer and highest of authorities of the Enrichment Center, GLaDOS resides in the Central AI Chamber.