Ive created a Juggernaut before and we were able to have conversations. Either she is bugged or I am not being allowed to talk with her again in order to remove her collar. There was a blip today on her picture to show that she wanted to have a conversation on the ship. When I went over to the ship later on, she was not willing to have a conversation. Perhaps there is a limit to how many opportunities I am given to take off her collar, but it has only been twice so far. I had many more opportunities with my Juggernaut before I wanted a Marauder.
Removing collar aside. Isn't it kind of lame how she is anything but a slave? She is passive aggressive at most, not submissive at all. Also, for good storytelling, there should be a way to progress without removing the collar. Maybe make the dialogue different.