Also known as Kanade, she is a priestest that fought against the Four War Gods in the 4th Inuyasha Movie called: Fire on the Mystic Island.
Lady Kanade: I shall pass on what little life I have left. In exchange, save these children.
Inuyasha: What happens to the kids is up to them. All I'm going to do is destroy the Four War Gods.
Lady Kanade: That is fine. You have my blessings.
Inuyasha: Asagi! We're getting outta here now.
Asagi: Is...it okay to stay alive?
Inuyasha: Quit asking permission like that!
Lady Kanade: Wait.
Asagi: Lady Kanade?
(quotes taken from the movie)