Unlock Other Shinigamis
Play Scenario Mode to unlock them:
Akagane no Isoroku - Clear Tai no Fukumaden (2nd Visit)
Byakko no Rangetsu - Clear Kiwame no Fukumaden
Enouki no Sanemaro - Clear Gi no Fukumaden (2nd Visit)
Hiiragi no Horin - Clear Shin no Fukumaden (1st Visit)
Ikazuchi no Fusanoshin - Clear Tai no Fukumaden (1st Visit)
Seiryuu no Kibachiyo - Clear Gi no Fukumaden (1st Visit)
Shuusui no Namazubou - Clear Shin no Fukumaden (2nd Visit)