You are half human half pilar men you are a joestar mostly you are from an alternative universe in that universe your father who was Joseph joestar fell in love with the pilar woman kars (yes Kars is a female) and Kars also hid thise feelings before ceasar died she saved him from death and kept him alive through healing (yes she can heal ) soon afterward after she became the ultimate lifeform she wiped out her army of vampires and then left 5 months later Joseph found her than they git married and had 2 kids the older one was Holly and the other one was you thanks to Kars genetics you and holly age similar to her so you both became adults at 19 your aging was a luttle rushed also you kind of have a healing factor and like jotaro you have star platinum but when you develop the ability to control time you can rewind it