Unlock Armstrong's Statue (requires "A" rank or higher) in arcade mode, then transmute it alone to unlock Hidden Scenario 1.
Hidden Scenario 2
Successfully complete Hidden Scenario 1 and unlock Cow Statue (requires "A" rank or higher) in arcade mode. Then, transmute it alone to unlock Hidden Scenario 2.
Level 4 arcade difficulty
Successfully complete levels 1, 2, and 3 in arcade mode, Then, transmute Knight Piece + Queen Piece (requires "A" rank or higher) to unlock the Level 4 arcade difficulty.
Play as Bradley
Unlock Eyepatch (requires "S" rank or higher) in arcade mode, then transmute it alone to unlock Bradley.
Play as Gluttony
Successfully complete Scenario 4 to unlock Gluttony.
Play as Greed
First, unlock Scar. Then, unlock Ultimate Shield in arcade mode (requires "A" rank or higher), then transmute it alone to unlock Greed.
Play as Izumi
First, unlock Greed. Then, unlock Izumi's Logo in arcade mode, then transmute it alone to unlock Izumi.
Play as Lust
Successfully complete any Scenario in story mode to unlock Lust.
Play as Scar
Successfully complete Scenario 6 to unlock Scar.
Play as Winry
Successfully complete Scenario 5 to unlock Winry.
Play as Wrath
Unlock Orobouro's Sign (requires "S" rank or higher) in arcade mode, then transmute it alone to unlock Wrath.