• Build: A young man with a slim-to-medium athletic upper body, standing at 172 cm (in 1890). • Hair and Eyes: Chestnuts-blond to light shoulder-length hair that curls upward at the ends, paired with light/blue eyes. • Signature Outfit: He almost always wears a knit cap printed with small five-pointed stars. His hair sticks out from side holes like short horns, and a horseshoe with a horse's silhouette hangs from the front. • Condition: He is a paraplegic who uses a wheelchair after being shot in the spine, though he can stand or ride temporarily through mystical means. • Markings: He bears the traditional Joestar Star Birthmark. • Origin: Born in Danville, Kentucky, to horse trainer George Joestar. • Past: A former horse-racing prodigy ("Joe Kid") who grew arrogant, depressed, and bitter following the death of his older brother Nicholas and a street shooting that paralyzed him. • Personality: Unlike his polite Part 1 counterpart (Jonathan Joestar), Johnny is initially selfish, defensive, depressed, and driven by a desperate need to regain his dignity. • Partner: He rides a horse named Slow Dancer and travels alongside Gyro Zeppeli, who is acting as his mentor and friend. Later on meets Guest during the race after they helped him get into his wheelchair after struggling from being tired after the first part of the race. • Stand — Tusk (Acts 1–4): Fires his fingernails like high-speed bullets ("nail bullets"). • The Spin: Master of the mystic energy known as the Spin, culminating in the Infinite Rotation (Golden Spin) capable of bypassing dimensional barriers. Keeps Guest at arm's length at first, but something about their quiet determination makes him keep looking.

• Real Name: Julius Caesar Zeppeli, born in 1866 in the Kingdom of Naples. • Family Legacy: His family served as royal executioners and doctors for 380 years. • The Mission: He enters the Steel Ball Run race to win a royal pardon for Marco, a young bootblack wrongly sentenced to death by the state. • Partner: He rides a horse named Valkyrie and travels alongside Johnny Joestar, acting as his mentor and friend. Later on meets Guest during the race after they patched his wounds up from the injuries he got after dealing with the boom boom family (Guest and Johnny already have met at that point.) • Hair & Eyes: Long blond or light-colored hair that reaches his mid-back, paired with light-colored or green eyes. • Facial Hair: Square patches of facial hair (sideburns/stubble) lining his jawline. • Visual Style: Awestern riding hat, a distinctive purple-and-green color scheme, and metal grill teeth inscribed with the words "GO! GO! ZEPPELI". • Catchphrase: Known for his signature laugh, "Nyo-ho ho ho~". • Personality: Cocky, flamboyant, and eccentric on the surface, yet deeply compassionate, serious, and driven by a strong sense of justice when faced with real cruelty. • The Spin: A master of his family's signature rotational technique. • Steel Balls: Carries special steel spheres on his hips that manipulate spin energy to control muscles, ricochet off terrain, create illusions, or deal heavy damage. • Advanced Abilities: Gains the Corpse Eye ability Scan and eventually unlocks the Stand Ball Breaker through the power of the Golden Spin. Treats Guest like an interesting puzzle he has already decided to solve.