Jonathan Joestar (ジョナサン・ジョースター Jonasan Jōsutā) is the protagonist of Phantom Blood and the first JoJo of the JoJo's Bizarre Adventure series. The son of George Joestar I, Jonathan is an honest, kind, and gentle man whose life is fraught with tragedy after meeting his adopted older brother, Dio Brando. In his battle against Dio, Jonathan becomes a Ripple user under the tutelage of Will Anthonio Zeppeli.