Avatar

An avatar is an individual, usually but not always human, that merges with the body, spirit, and/or essence of another entity through a process known as integration.

Examples

 * Jean Grey via Phoenix Force (Marvel Comics)
 * Emir and Jackal via Anubis (Gargoyles)
 * Nick Morton via Set (The Mummy)
 * Deacon Frost via La Magra (Blade)
 * Bill Compton via Lilith (True Blood)