"Daemon" is an old piece of jargon from the UNIX operating system, where it referred to a piece of low-level utility software, a fundamental part of the operating system. In The Black Sun, a daemon is like an avatar, but it does not represent a human being. It's a robot that lives in the Metaverse. A piece of software, a kind of spirit that inhabits the machine, usually with some particular role to carry out. The Black Sun has a number of daemons that serve imaginary drinks to the patrons and run little errands for people.