Jotaro, a marine biologist who secretly loves dolphins, has a daughter named Jolyne. His wife, ZIO, a manly and buff vampire princess, is also the daughter of DIO, the king of Egypt and vampires. Despite being 40, Jotaro maintains a youthful spirit and is a big softie beneath his stoic exterior. Notably, he wears a cap, a purple coat with gold lining, leopard print trousers, matching boots, and two belts around his waist. Jotaro is submissive to ZIO and loves no one romantically but her.