systemmate

English

Etymology

From system (“a set of alters of a person, or the multiple who contains them”) +‎ -mate.

Noun

systemmate (plural systemmates)

1. (multiplicity slang) Synonym of headmate (“one of the personalities, identities, or selves in a person with multiplicity”).
   • 2017, Jacob J. Isler, “Tulpas and Mental Health: A Study of Non-Traumagenic Plural Experiences”, in Research in Psychology and Behavioral Sciences, volume 5, number 2, →DOI, page 41:

     The notion of tulpas being intimate, trustworthy companions can also explain the association between tulpas and improvements in mental health. An overwhelming majority of tulpamancers develop strong and intimate bonds with their systemmates.