Communicating will be the most frequent form of interaction you will have between players so being aware of WHO is in Avalon at a given time is essential, although some may choose not to make themselves known.
Central to the idea of a multi-player game is that of communication and interaction between its inhabitants. The best way to get a feel of the land is by talking with other players. The help sections in this topic discuss both the rudimentary and the more sophisticated ways of expressing yourself. You should acquaint yourself full with all of them.
It is important to ascertain who your present player companions are within the land at any given time. You can find this out by typing WHO. This command will list all the people in the local region that are currently playing Avalon with you and are not concealed by extra-ordinary means. Some may choose to hide themselves in order that they might slink about unnoticed, creeping up on their prey or hiding from their enemies.
See HELP COMMUNICATION and HELP CALLING for further command information and HELP 5 to review the index of Avalon manual section five, specifically on this topic.