/friend Player.1234
/unfriend Player.1234Adds a player to your contacts list or removes them. Contacts are account-wide, so you see them online regardless of which character either of you is on.
You represent one guild but stay in up to six. /g1 through /g6 post to a specific guild in your list, so you can answer your raid guild without switching representation.
/g2 Raid slot open for the 21:00 run