You may register any account name you like. After registering, please change your display name to the name of the character you plan to play on that account. This can be done by going to Profile > Edit Profile > Personal and typing your desired name in the field named "display name".
Generally, any user with a name that is not appropriate will be asked to change it. If the person keeps selecting inappropriate names, you may be banned or suspended. Gibberish, trademarks, partial or complete sentences, chatspeak and references to anime/other games/books/real world character from another source are all not allowed for a display name (sorry, you can't be Cloud Strife).
If it is not changed to a suitable name within a week after registering, a staff member will assign a name to that account.
New characters may NOT be made within at least a month of each other, and this is subject to change by the word of the moderating team. You may have one character per account, but you may only play one canon character between all of your accounts. We allow four original characters and one canon per player; though we ask you to make sure you are able to play all the characters you make.