Kaolinite

QUICK BIO
Kaolinite was the first person to search for the talismans crystals. She was not part of the Witches 5. She was seemingly killed when the inner scouts attacked her with Sailor Planet Power, and Uranus's World Shaking knocked her off the roof. She was the one to feed Hotaru the heart crystal. While Professor Tomoe congratulated her on finding such a pure heart, Mistress 9 let loose a blast that killed her.

SOURCE:Bishoujo Senshi Sailormoon