He is an eldery man with white beard and white hair. He wears a formal suit and a black tie.
Nothing is known about his personality.
He found ARES, a private military corporation, about thirty years ago. His son supposedly would become his successor. However, in order to protect him from opposition parties, this position was taken by his close friend. According the Board of Chairman, he was the one who was responsible for the death of the Professor's wife and colleagues.
- In Greek Mythology, Zeus is the god of sky and thunder.