Lots of people enjoy playing multiple characters in GW2, and the only way as far as I know to keep track of who is who is to look at their account name. If they log in on another character while PM’ing it can also be confusing..
Short of renaming all your characters X The Mesmer, X The Warrior, X The Thief… it could be a nice idea to have the option to display the account name in chat instead of the character name, this way people who remember who was who a lot easier and make forming bonds amongst other players easier..
Just a thought.