In Chapter 6, meet Robert then complete his "Plight" side quest.
Easy "Capilli Catch" Trophy
Finn will meet you in Chapter 4. Complete his side-quest, "Finn's Plight".
Easy "Comedy" Trophy
Naturally occurs during the storyline, when Rubella joins Aurora's party.
Easy "Kategida Kindred" Trophy
At the start of Chapter 8, you will meet Oengus. Then, complete the "Plight" side quest.
Easy "Piscean Promise" Trophy
At the start of Chapter 9, you will reach Piscean Village. An NPC will ask you to find her parents. Move straight and get inside the tower to solve a puzzle. Defeat the Boss to get the "Gen's Plight" side quest. Return to Piscean Village and speak with Gen.
Easy "Sweet Sister" Trophy
Naturally occurs during the storyline, when Norah joins Aurora's party in Chapter 5.
Easy "Tragedy" Trophy
At the start of Chapter 7, fly up from the large open area to reach a narrow space. You will get to Tristis at the top of the cliff. Speak with him and reunite him with his sister to complete the "Rubella's Plight" side quest.
New Game+
By beating the game, you will unlock a New Game+ feature. In this, your items (barring Quests), Oculi, and Confessions will be carried to the next new game you play, as will your levels and skills once the characters can be re-recruited. However, note that your Coffers need to be reobtained, and that enemies are now stronger.
Various Trophies
Complete the following tasks to unlock PlayStation 3 trophy rewards.
