If someone makes up a name that's obviously an attempt to be mistaken for one of your characters, let us know and we can change the password on that name so it can't be used. And we'll keep an eye on the username list to try to keep it from happening again.
In that same vein, if you've forgotten the password to your char then just let us know and we can set up a temporary password to get you back in. This is MUCH better than making up a new-but-close character name, because it might be mistaken for someone else trying to play your char.
Ideally, we need some way of telling you're the "real" player of the character, for both of the above interventions by the Magi. We'll do our best to work with you on that.
And if you have any reason to believe that someone's guessed your password, please make sure to change the password yourself.