Sorry if I upset anyone with this. I was pretty upset myself. This information was at this link
Alters in Dissociative Identity Disorder - Dissociative Identity Disorder, Dissociation and Trauma Disorders

A lot of the information was helpful. I realized that I have a few "oep" alters. My t asked one of us at last session what is our purpose and all we knew is that we talk to the others and do not function in the world except at session. And that is with in the past year only. Now I know she is an "OEP" and that definition makes perfect sense. Also some of the other descriptions of alters help me to make more sense of my system, I have heard about sleeping originals or originals who stay so far back they never live in the world. But I have been searching for my original and I don't feel one. There is someone who is in denial of our diagnosis. She always cries and says no no over and over. We try to talk to her but it is like she don't hear us. We are thinking she might be the original but she doesn't hear us and is never in the world. She only presents in that hysterical state. We are starting to think that maybe we don't have an original. And the reason we started therapy and continue to go was to find the original and integrate. If we don't have an original how do we integrate.