Josuke is a biracial (half-Japanese and half-British) first-year high school student residing in the town of Morioh. In the year 1999, he meets Jotaro Kujo, who informs him that he is Joseph's illegitimate son, making him a descendant of the Joestar Family. After his grandfather dies, Josuke takes it upon himself to protect his beloved town from malevolent Stand users.

Lyserg comes from a fairly well off british aristocratic family. His father was a capable detective who he looked up to when he was young, up until their tragic deaths when he was aged 6. He grows up to be a police officer, but his training in a previous group (the xlaws) faired him extremely well and he was noticed and given the position as an MI6 agent. He is highly intelligent, witty, perceptive, sarcastic but genuine, sweet, and caring.