Gyro has a cocky and flamboyant personality, appearing to have a high opinion of himself. However, he can be driven by emotions for other people and become realistic and serious when a problem presents itself. Like most Manga archetypes, Gyro is incredibly intelligent when he needs to be. His most distinguishable body features are his long hair, western hat and his gold teeth which have "GO! GO! ZEPPELI" displayed on them, revealed whenever he smiles at someone. His signature laugh/chuckle is "Nyo ho ho ho~".  ~!Note that the "Caesar" in his name is pronounced in the traditional Greek way, more akin to the German "Kaiser". This is distinct from Caesar Anthonio Zeppeli from JoJo's Bizarre Adventure Part 2, whose name is pronounced in the modern English way.!~

Originally presented as an unrelated story, this series was later officially declared a part of the JoJo storyline. The series stars Gyro Zeppeli, who uses a set of steel balls that spin incredibly fast, and Johnny Joestar (Jonathan Joestar), a former hot-shot jockey who was crippled by an ambusher and lost his fame and fortune. They race, along with others, in a mad-dash across America for 50 million dollars, reminiscent of The Cannonball Run. 
(Source: Wikipedia)

This part will take place in Morioh-Cho (the same town in Part 4: Diamond is Unbreakable), but in the alternative universe in which Steel Ball Run takes place.
 
Following the Great East Japan earthquake, Morioh has been stricken by vast earthen protrusions known by the locals as Wall Eyes. Despite investigation, professional estimations are left empty. Meanwhile, the young girl Yasuho Hirose discovers a man buried within the ground, he possesses a distinctive star-shaped birthmark together with deeply penetrating bite marks. The man, who has contracted a staple case of amnesia is taken in by a local family and given the name Jousuke Higashikata, however mysterious events cannot stop from piling one upon the other and soon that enigma known as stands emerges to complement the great cloud of confusion.

The seventh story arc of the long-running JoJo's Bizarre Adventure series.