Blue Thunder

Blue Thunder (ブルーサンダー, Burū sandā) is the Stand of Koji Hirose. It was featured in the JORGE JOESTAR light novel in the 37th Universe.

Appearance
Blue Thunder appears on top of Koji's head and is simply just a tiny propeller. It is referenced to be similar from the propeller from the series Doraemon. The propeller sticks out of Koji's head.

Abilities
Blue Thunder allows Koji to fly freely in the air. It can create wind gusts so strong that they can knock down walls from buildings.