Nicknames (or usernames) are unique identifiers that refer to a specific account. These usernames may be used across multiple Atelier 801 games, as well as the forum.
While most people refer to these as "usernames", the are officially referred to as "nicknames" by Atelier 801 staff.
On 12 March 2018, a # system was implemented for nicknames, allowing players to choose any nickname, even if it was taken before. Players who registered before this system have been given a free name change.