A lot of the surface population have had at least two spirits entering in and out of their physical body throughout the course of their lifetime.
This technology has always been used by the Archons on the astral plane in order to put people that are striving for change on the surface of the planet into situations that are detrimental to their situation. This is often done by transferring the spirits of their family, spouse or anyone essential to their life mission at key times throughout their journey with a spirit that is out to harm them.
Astral body is another term for spirit.
The astral body affects the personality of a person. An example of a successful spirit transfer by the Draco Federation would be transferring the spirit of a wealthy person that is about to give someone money to help the planet with another spirit that has no intention of giving out money.
Over time the astral body can magnetize the etheric body which can lead to a moderate change in facial features.
Another sign of a spirit transfer would be a complete change in the habits of a person overnight.