Composite

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A composite headmate is one who identifies as an original self and whose identity is composed of multiple introjective or semi-introjective sources at once.

This is distinct from multifictive in that the headmate is a distinct identity with sourced influences rather than being multiple fictive identities at once.

Related Terms
Amalgam may be considered a synonym.

A composite may be considered a pre-factive or pre-fictive.

A composite may pick up sources due to or alongside canonbonding.