New Game mode:
Beat the game and load your cleared saved game file to unlock New Game mode.
Bonus characters:
Unlock the following characters by performing the corresponding tasks:
Bishamon, Koumoku, and Zouchou – Take almost any route except for Yuzu; mandatory battles.
Lucifer – Defeat Lucifer in New Game mode.
Kresnik and Kudlak – Defeat Kudlak by returning the bag to either Kaido or Mari, and let Mari get the last hit.
Pazuzu – Defeat Kaido.
Yama – Give Kaido Mari’s bag, and defeat Keisuke.
Alternate title screen:
Unlock the following character icons at the title screen by performing the corresponding tasks:
Amane – Take Amane’s path, and beat the game.
Atsuro – Take Atsuro’s path, and beat the game.
Gin – Take Gin’s path, and beat the game.
Kaido – Take Kaido’s path, and beat the game.
Naoya – Take Naoya’s path, and beat the game.
Yuzu – Take Yuzu’s path, and beat the game.