Robert E. O. Speedwagon

[Part 1 Phantom Blood]
A man that traveled with Jonathan and Zeppeli, who got charmed not only by Jonathan's outward appearance​, but because he was a "Gentlemen to the core".

He couldn't learn the Hamon, but he did his best to contribute his comrades.

[Part 2 Battle Tendency]
After the battle between Jonathan and Dio ended, he went to America and succeeded in the oil industry.

Using that fortune he established the "Speedwagon Foundation".

Supports the later generations of the Joestar family.