Imagitive

Not to be confused with imaginitive, a headmate sourced from an imageundefined:

An imagitive is a headmate that started off as an imaginary friend but was then introjected into the system.

Related Terms
A cogisian may be described as an in-between state between imaginary friend and headmate.

An imagitive may also be a thoughtform or parative, depending on how exactly they joined the system.

An imagitive may be considered to be imaginagenic.