Sango and Miroku in “Unfinished Business”

Sango

My villagers have worked as slayers for generation upon generation, and it likely has something to do with Midoriko's influence. Over the centuries, the Sacred Jewel passed through the hands of several humans and demons, and finally returned here, in my grandfather's time. The Shikon Jewel had come out of a demon that he had slain. But my grandfather's life, and the lives of many others, were sacrificed in the battle. The sacred Shikon Jewel was removed from the demon, but it was horribly defiled and the villagers did not possess the ability to handle it.

Miroku

So they put in Kikyo's care.

Sango

Kikyo? Was she the priestess who had the ability to purify the Sacred Jewel?

Miroku

Yes, but Naraku found out about her and killed her.