So I've completed act 1, played on my own in a multiplayer solo game.
All the conversation I've been doing was with my main, custom character.
The problem, I realize now is that each name character's in my party may have had a special conversation for them, but i will never know because who would restart every conversation 4 times, one for each characters....
A the beginning event's like Lohse and Sabile would happen in town by inserting themselves in the conversation which is fine....but i will never know now if there was more of theses special conversation. Maybe they should step in when that happens or have a text over there head saying something about it.
As for my main topic here, my 3 other character's never removed their collar because my main spoke to Leya in town and the conversation about removing their collar never triggered....
So maybe Leya should look at your other friends when The One would converse with her and propose to remove their collars or the other way around, have the 3 other character's say something about it...
