Former street thug, Robert E.O. Speedwagon become longtime supporter of JoJo's family even after his death.
An ally of the first JoJo, also a reference to the American rock band REO Speedwagon.
Robert E.O. Speedwagon was a gang leader on Ogre Street in London when he first encountered Jonathan Joestar in the mid-to-late 19th century. That JoJo was looking for an "oriental" man who supposedly sold the drug that was slowly killing his father, Joseph Joestar. Speedwagon was defeated by JoJo, but was impressed with his strength that he became a close friend. Not only did he help in exposing Dio Brando, but continued to provide help to the Joestar clan even after Jonathan fought with Dio. Eventually he travelled to the United States and started an oil business.
Wielded a special bowler cap that he could throw like a weapon to slice through his opponents with the bladed brim.