Jaina/Ezra
Not all, but a lot of them. I'm not envasive, but with Jacen and Anakin, I already know.. everything. Mostly. It'd involve a lot of trust on your part.
Not erasure - I can do that, but I don't like it. Healing. We were kidnapped and tortured, the body often heals quicker than the mind, and a trance can help.. smooth things over. It alleviates post-traumatic stress and allows your mind to rest, rather than trying to work overtime coping.
With other people, it's a step-by-step process that's a few hours each week. At first it might make things a little raw and sensitive, give you dreams and anxiety. But after a few sessions, you'll find that it's like a weight lifted off your mind.