Who is Kevin from Out on a Limb and what is their importance?

Kevin is a trance medium who gives readings to people. Kevin goes into a trance and one or all of four spirit guides who speak through him come through. These spirit guides have information about the spiritual plane and about spirituality as a whole they share with people. Kevin is the first trance medium Shirley is able to speak with one on one who is able to address some of her past lives.