Fade to Silence

Followers will gain trust in you over time. As you are exploring and returning to the refuge you'll occasionally trigger a conversation where you're follower will tell you about their life. The final conversation to reach max trust requires that you walk all the way up to the character and hold A to talk. The events leading up to the final one you just walk near them to trigger the event. I stood and listened to the whole conversation for each character, not sure if you leave mid conversation what happens. Each character has three conversations, after the last one you unlock their Adept abilities.

To make these events appear make sure you return to the refuge at regular intervals, you can manage much of the game remotely, but the events don't spawn unless you return to the refuge. If for some reason you are wasting time in the refuge you will have to leave and then return for the follower conversations to trigger.