Terminology I use

Frequent Flyer(s): Alters that front the majority of the time, or are very common in our life.

Alter: A person in a system.

Fragment: An alter that has little elaboration. Most commonly, they hold single memories, emotions, or can only perform their "job."

Protector: Protectors are alters that protect the body, system, host, or other specific alters or groups of alters.

Host (& Co-Host): Host alters are responsible for most aspects of daily life.

Littles: Another name for child alters.