To get the extra costumes for any character, beat the game with that character. For instence if you beat the game with Danzaiver you get his extra costume in the vs mode or the 1 player battle mode.

To play as boss and access the hidden stage, beat the game with 3 different characters in story mode.

Each character you beat in story mode will earn you 7 new postures.

To be play as Ihadurca, beat Story Mode with any two characters, then beat it again with Setsuna. Ihadurca will appear on the character selection screen.

Beat all modes with all characters, then go to the OPTIONS menu, choose "Extra" and select "Congratulations". You will see a special scene of all characters making speeches about their success.

Beat a chracter in story mode to know their Background story by going into the extra option in Option menu. (e.g if you beat Danzaiver in stroy mode, you will know his biography) This will also enable the gallery mode to enjoy some nice rough sketch of the artists.

To open the Voice Collection beat Story mode with any characters on the hardest difficulty level. Once you beat it with that character you will be able to hear all of that characters voices. Beat it with all the characters to hear the other characters voices.

Beat the "Story Mode" with any character.Then go to the options screen.Look for the word EXTRA.Select it and you will see Gallery.