This Seeking Tech guide explains how you can get the Jeanne d’Arc trophy called I Never Stopped Calling. To unlock this trophy, Liane needs to rejoin your party in the post-game.
For this to happen, you first need to complete the second season of the Colosseum. I already covered the first two seasons of the Colosseum in prior videos if you need help. You can find them below:
When you beat the second season, you should get the Charred Pendant as one of the rewards. With that in hand, head to the Cemetery to get Liane to rejoin your party and unlock this trophy.