Kaolinite

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 the Sailor Planet Power, and Uranus's World Shaking knocked her off the roof. She appeared much later as a lab assistant to professor Tomoe, and a tormenter to Hotaru. She stole Chibi-Usa's heart crystal and feed it to Hotaru wich released Mistress 9. When Mistress 9 awoke, she released a blast that killed Kaolinite.