Throughout this guide, the following sidebars are used to bring your attention to certain optional parts of the game.
This sidebar is used to show you the party members that are available to you for the following part of the guide. It is only used when characters join or leave the party, or the party changes completely.
Some parts of Eternal Sonata can only be accessed on a second playthrough. This additional game, called "Encore", is available by loading your finished save as a new playthrough - this will start a New Game Plus, with more difficult enemies, and some minor differences to the sidequests and score pieces which are necessary to unlock all the game's achievements.
Note: since the enemies are more difficult during the Encore playthrough (they deal double or more damage), focus on back attacks and guarding.
As you progress through the story, certain characters will trade items with you in a particular chain, resulting in an Orb that is used to unlock a secret door in Chapter 7.