Factive

Factives are headmates that are based on a non-fictional source, like another person. Sources can include celebrities, historical figures, friends, abusers, or anyone else. The source can be a singlet or a member of a system (including their own, or someone else's).

Related Terms
Introject is an umbrella term for headmates that have a source.

Fictives are headmates based on a fictional source.

Factive-flux is when a headmate's connection to their source(s) varies over time.