US Patent 7654902 User-name switching method on network game

A terminal receives service provided by a server while using any one of a group of user-names stored in the server for each user and while using a character associated with the user-name. When a character currently in use is switched to another character according to a user instruction, the terminal compares a user-name associated with the switched character with a user-name currently in use. When the compared user-name is different from the user-name currently in use, the terminal switches the user-name on the terminal side to a user-name associated with the switched character, and transmits information, indicating the user-name associated with the switched character, to the server.