I don't know. It seems as if this is more a case of possession then sharing.

Para

Did you ever feel like you were not yourself or as if your personality and interests changed literally overnight? If so, then you might be a walk-in!

Walk-In Souls – Book Excerpt of Hidden Mysteries
by Joshua David Stone

Walk-ins are soul extensions, or personalities, who take over the body of an adult human being who has chosen to leave his or her physical body.

It is important to explain that this process is usually governed by and controlled at the soul level. The soul extension, or personality, who is walking out of the body usually has no conscious awareness of the procedure. It is usually the soul who has made the decision, although in some rare instances the personality has requested it.

Walk-In Souls - Book Excerpt of Hidden Mysteries In the most cases the new walk-in who takes over the body has no conscious awareness of the change, either. The transition period can take anywhere from three months to six years to transpire. It is usually very disconcerting to the walk-out’s emotional body because there is a process of sharing the physical body with the other entity for a period of time, and, in mot cases, the walk-out is not conscious of what is occurring.

Entities of all levels and states of consciousness can be walk-ins and it is not limited to sixth-dimensional beings. The walk-in will come into the new physical body only, of course, if the walk-out has agreed to it on a soul level.

The second important ingredient is that the souls, or higher selves, and the spirit guides of the walk-in and the walk-out feel that the physical vehicles is strong enough and the emotional vehicle stable enough for the process to work effectively. Such a transfer is very much like a major surgery on an etheric level. Teams of spirit guides help help in the transfer. It is a very delicate procedure.

It is very important to point out the difference between a walk-in and a possession: a possession is a forced entry into a person’s auric field that can cause the entity living in that body to be booted out. […] Most possessions, however, do not result in the exiting entity’s being booted out of its body.

concept of a walk-in is sometimes hThe concept of a walk-in is sometimes hard for people to believe. If you think about it, everyone is a walk-in in the sense that everyone walk into a baby’s body. The only difference is that the walk-in moves into an adult body rather than an infant body.