Isabella operates as an assassin directly under Yuda (Juda), the successor of the South Star Crimson Crane Fist and leader of the UD Gang. Her survival within his inner circle demands absolute physical perfection, as Yuda permits only those he judges beautiful near him. This imperative forces her to execute missions with meticulous care to avoid any injury, scar, or disfigurement that might cost her position. She possesses shoulder-length brown hair, red eyes, and typically wears a dress, pumps, a shawl, and earrings. Isabella also bears a tattoo.