Source-Derivation

Source-derivation is a term about introjects or outsourced headmates.

In most cases, introjects (and their canons) have more details than their source, this phenomenon is called source-derivation. For example, there is no information of which flavor of ice-cream a character like or their favorite subject during high school time in their original story, but a soulbond based on that character can give a certain answer about the questions above.

It is considered that the minds of systems or headmate creators (e.g. soulbonders) would automatically or intentionally fill in the gaps about characteristics between source and introjects, causing source-derivation.