Hayden Sitty is a minor character in The Amazing World of Gumball. He is an old-fashioned floppy disk that has worked for the Cyber Police since the 1980s, yet has little to no knowledge of modern technology. For example, he does not know how to send e-mails; he simply writes words down on a piece of paper and puts it in the CD-ROM. He makes his first appearance in "The Internet."
He is a standard 31⁄2-inch gray floppy disk with glasses and a mustache.
- "The Romantic": He is part of the flash mob organized by Gumball.
- His surname and the initial of his forename were both revealed in "The Gumball Chronicles: Elmore's Most Wanted."