Doctor Wu

Doctor Wu (ドクター・ウー) is the Stand of Dr. Wu Tomoki, featured in JoJolion.

Appearance
Doctor Wu is bound to the body of Wu Tomoki, and his Rock Human physiology.

Gravel Transformation
Doctor Wu allows Wu Tomoki to break apart his body into small independently controlled stones. The particles themselves have no power and float around on the wind. In this form, Dr. Wu can invade someone's body and take control of their movements, fusing with body parts such as the bones. However, it seems the ability to parasitize someone is tied to a particular rock acting as a beacon for the rest of the gravel and paralyzing its victim at the same time.

His gravel form seems to induce an allergic reaction in those he attacks if inhaled, as he is essentially a foreign body. He can also add other substances to his gravel form, such as sleeping pills, which he uses to try to subdue Mitsuba Higashikata and Yasuho Hirose.

Trivia

 * The name of the Stand was first hinted at the Hirohiko Araki JoJo Exhibition: Ripples of Adventure where early design artwork of Wu Tomoki also identifies him by the name Doctor Wu (ドクターウー).
 * Doctor Wu is the third Stand in the series to share a similar name to (or have the exact name as) its user, preceded by Foo Fighters and Weather Report.