Account
From Guild Wars Wiki
The term account refers to the authorized user account granted to a player by Arena.net, usually by purchasing a Guild Wars product. Accounts are tied to individuals and are not transferable, as specified in the EULA. An access key which comes with a Guild Wars product can be used to start a new account, or may be added to an existing account to link the new features to that account.
An account can be given a unique name, which is used to allow the player to enter Automated Tournaments and Hero Battles. By speaking to Tolkano you can set the name of the account to the name of one of your existing characters. This will reserve the name, preventing others from using it while it is linked to your account, so if you delete the character the account was named after, the name cannot be used by another person. This name may be changed every 30 days.
Some aspects of Guild Wars game play are tied to the account. For instance, PvP skill and item unlocks are tied to a user's account instead of to the individual characters on that account. Titles related to PvP play are also tied to account, this includes Hero, Gladiator, Champion, Commander, Allegiance rank, Gamer and the Zaishen titles.
Although users may own multiple accounts, accounts cannot be merged at this time.

