I am configuring a web server on OpenBSD and I can see in /var/www/ that all directories except /var/www/cache/ are root:daemon.
I then see that the user for the daemon group is daemon
$ grep daemon /etc/group
daemon:*:1:daemon
$ grep daemon /etc/passwd
daemon:*:1:1:The devil himself:/root:/sbin/nologin
_tftp_proxy:*:108:108:tftp proxy daemon:/nonexistent:/sbin/nologin
_ftp_proxy:*:109:109:ftp proxy daemon:/nonexistent:/sbin/nologin
What is the purpose of the daemon user and the daemon group?