Partnergenic

Partnergenic:

Partnergenic is an endogenic origin which a headmate of the system forms in response to another headmate in one's partner system, typically to be a counterpart, partner, or companion for them.

Those which the headmate has formed in response to may be called a muse.

Related Terms
Intuspartnergenic, extrapartnergenic, and pseudopartnergenic are origins that fall under partnergenic.