Jonathan Johnson

Jonathan Johnson IV (born July 13, 1991), often referred to as simply "JoJo", is the son of the late Jonathan Johnson III and the late Giovanna Johnson, and the first and member of a well-known and wealthy family turned vigilante in Ultimate City. As a member of the Johnson family, he is the fourth "JoJo" in his bloodline.

During a party with the Harpers, Jonathan was kidnapped by The Blind and after being rescued by the vigilante Stryker, Jonathan began to admire him. He joined Team Stryker, becoming Wes Gates' sidekick and vigilante partner using the codename "JoJo", aiding him in his crusade against Axel Jaxson and Heath Lenwood, until the death of Billy Cooper. When the police went after the killer, believing it was either the Stryker or JoJo, Jonathan, blaming himself for Billy's death, decided to turn himself in however his father Jonathan III took the fall, and was killed by prison inmates.

After this, Jonathan left Team Stryker to start a new life and began dating a nurse, however, he returned to assist Wes when Shadow unleashed his army of anarchists on the city, donning his old JoJo codename once again. In 2024, he helped Zero during the Xeno Offensive and three years later, Jonathan left North City to East City to join Team X, in a final attempt to take down Xeno, leaving behind his girlfriend and their son, Josh, temporarily.