1) nope! she can sense mana, which is roughly the essence of life, but mind things? not at all.
2) naaaaah. go for it.
3) like Zelos, she doesn't come from a world with much in the way of necessary mental defenses. So feel free to touch as much as you like. Will note that Raine's mind is fairly well-organized; I don't know if that will help or hinder.