no, the tribal shaman takes it from you, and give you something else, "she's embrace", but that very well could just be a weapon he made to honor your vision or something.
I think you're overanolyzing this too much. Even though you're in a trace, you can still move and fast-travel and kill animals, so it's unlikely that you wouldn't be able to kill the Ghost of She.
Also, to the original poster at the top of the thread, it's in the quest Rite of Passage. You can find a walkthrough here: http://www.youtube.com/watch?v=DfTv47Ra154
You can also get it off of the wikia: http://fallout.wikia.com/wiki/Rite_of_Passage