Joe is a member of the new generation of Seven Knights at Granseed Academy, bonded to the soul of the original knight Spike. This bond grants him potent ice abilities. His intense obsession with physical strength stems from witnessing his father die while combating Physis-infected monsters, fueling his relentless drive to train and become stronger.

He projects a stoic personality but deeply values his friendships within the Seven Knights, demonstrating steadfast loyalty and a consistent willingness to support his comrades. Joe develops a crush on Shirley, a fellow knight who harbors the secret of being a vampire, though the available sources do not elaborate on the full dynamics of their relationship.

As a Successor, Joe actively battles the cult of Physis. He wields his inherited ice powers in this ongoing conflict, fighting to protect the world from a resurgence of destruction.