Jonathan Joestar, known as JoJo, is the protagonist of 'Phantom Blood' in the 'JoJo's Bizarre Adventure' series. Born into a wealthy English family, he embodies the ideals of justice and honor. Despite the challenges posed by his rival, Dio Brando, Jonathan's unwavering spirit drives him to protect those he loves. He is skilled in hand-to-hand combat and is one of the first to use the Ripple technique to combat supernatural threats. Jonathan's strong moral compass guides him through various adventures, making him a symbol of hope and resilience against evil.