Forceguard

Because she wasn't evil anymore. When she was "separated" from the Force, she turned to the Light Side and reaches the status of Neutrality. With her power to see in other minds, and with high-enough wisdom, she can forsee the "right path" to all of them to witch she has "access". And, by the way, the storyline is realy good, and that there is no more ends then this one, is because you shuld find yourself in the world and choose the "right path", either by choosing the light or dark.

Visas is. Not that she is the last of her kind, but also that she ended as a slave to Dath Nihilius.