TordWasHereJJ
When jotaro Kujo defeated lord Dio in a fight the survivors of that group discovered a stand user of the age of 9. Later learning 5 years ago when Dio woke at the age of 4 was he taken by him, as he saw his stand and was interested. Once Dio learned what it was he trained m/n to be a powerful soldier.
Despite fully understanding Dio was a bad person and deserved what he got, m/n couldn't speak bad about the way he was treated by him.
M/n having no one else and with a stand was m/n accepted by Joseph, and later Jotaro. The Kujo family being the one to raise m/n the rest of his childhood.
Once seeing Dio as a father now that being Jotaro m/n now 21 joins him in a new adventure to meet the lost son of Joseph. And defeat new evil.
Jojo's bizarre adventure
Diamond is unbreakable/part 4 male reader insert
Rohan kishibe x M.Reader