High Priestess is a Stand bound to mineral. Its "default" form is that of a kabuki mask with vicious eyes and bared fangs, and thin arms with curved fingernails growing out of its sides on an almost spherical body of liquid metal "hair". It can, however, turn into any inorganic object. It represents the Tarot Card The High Priestess.
According to JOJOVELLER, its design takes elements from traditional outfits for African magic.
Mineral Possession and Reformation: High Priestess possesses the ability to possess mineral substances and reform them into any inorganic object (razor blades, valves, harpoon guns, etc.). It initially disguised itself as a mug, which caught Joseph off-guard. It has been known to possess a portion of ocean floor large enough to imprison several human beings.
Hard Teeth: High Priestess possesses teeth harder than diamonds, making it almost unbreakable. The Stand can use them to crush the opponent by chewing them.