The password is just for me when you send in an e-mail form.  So I know it's you, and not someone pretending to be you.

          Your Soul Reaper's back story is what your character did before joining us in Den City.  If you write a back story I will copy and paste it on your characters bio page.

          Your Zanpakuto's name will be added to your page when you get the necessary abilities.  Shikai is the released form of your zanpakuto.  Zanpakutos are basic swords until their shikai is released.  With shikai, your zanpakuto could change into just about any form.  From a giant eight pronged sword, to a small throwing star.  Releasing shikai usually gives a zanpakuto some kind of special power also (ie. paralyze anything it cuts, or maybe it's invisible to the naked eye).  Bankai is the highest form of a zanpakuto.  It can be almost anything (ie. a giant lizard with hairy feet, or a special enviroment that plays on your strengths).  Bankai release has a special ability as well (depending on the type of bankai).

          Use your imagination (but dont get carried away, now ;P.)