Retirado do guia postado no fórum PlayStation Trophies por Kheaphatic.
Veja como desbloquear os personagens opcionais na dica postada para “The Strongest Harem”.
“#1. Must be on your second playthrough, with the main character you didn't pick the first time. #2. Must have received the Normal or True Ending on the previous playthrough. #3. Recruit the first 3 optional characters. See The Strongest Harem for details. #4. In Chapter 11 you will need to see 2 optional events. The first one is from the space debris ”Abandoned Hamlet“ and the event has the same name. The second debris is ”Fallen Building“ while the event is named ”Decimated Mecca.“
If you can't view these events right away, stay at the Inn for a few days until they show up. These must be seen otherwise you will not be on the True Route End.
#5. Before you go to the last dungeon you will need to drift at least 15 random dungeons. Be sure to keep track because you'll also want to complete the other drift trophies after this. #6. Defeat the last boss, if everything was done right the 4th optional character will join you. If something wasn't right the credits will roll and you will get another ending instead. #7. Now you're in the post game and there's a new area titled ”Drifting Space,“ the dungeon with the final boss is ”Asura's Path.“ Power up your characters go in there and defeat Asura for the final part of this trophy.”