In Buddhism, Anatta means soul-lessness. It is a doctrine of rebirth that should be distinguished from the theory of reincarnation.

In Buddhism, anatta means "non-self" or "absence of separate self."

Ivan M. Anatta has written:

'Trees' -- subject(s): Juvenile literature, Trees

the three signs of being are dukkha, anatta, and anicca.

After completing the last quest in the series her dialogue will no longer change; once you leave the Vault I believe it is locked behind you.