Joseph is the other JoJo who appears most often throughout the series, showing up in parts 2, 3, and 4. Joseph is the polar opposite of his grandfather Jonathan, being brash, crude, disrespectful ...
However, as far as Jojo's parts go, it has little relevance to anything ... While Jonathan is the embodiment of pure good in the series, Joseph Joestar has a good heart but has a tricky energy ...