Final answer:
The question seems to reference a Percy associated with Greek mythology or history in relation to chariot design, but the context is unclear. Historically, chariot racing offered fame and fortune, and figures like Diocles and Ramesses II exemplify its cultural importance. Charioteering was significant in ancient societies both for sport and military purposes.
Step-by-step explanation:
The question "Who does Percy first fully design a chariot with?" misleads us into thinking about Percy from Greek mythology or a historical figure, but no clear connection to the provided references is made. Therefore, it is important to clarify the context. In the context of historical charioteering and its cultural importance in ancient societies, we learn from the references that charioteering was not just a sport, but also a path to fame and fortune for successful charioteers such as Scirtis and Diocles. These charioteers had the resources to set up records of their lives, much like wealthy Romans of their time. Furthermore, chariot racing was embedded in the culture and politics of the time, as seen with the Roman emperor Caligula's attachment to the Green faction and his horse Incitatus. The provided excerpts also illustrate the military use of chariots, highlighting Ramesses II at the Battle of Qadesh and Darius III's desperation in battle, demonstrating the significant role of chariot drivers and their teams historically.