The Prism of Lyra says the following about soul braiding: "A Soul Braid is the most common form of what has been labeled 'Walk-in'. It occurs when a physical individual takes in more of their own higher, future or parallel energy and incorporates it into their own personality and their physiological life." (Glossary)
"This process is the bringing in of a higher frequency of the soul's own energy, not an exchange of consciousness. It can be mistakenly understood as the entrance of a new consciousness, whereas it is a stepping up and integration of the original consciousness." (p. 65).