Dr. Zeta will be a prominent character and quest-giver in Oh So Hero!.

He's a bit of a loner and comes off as an overly serious person, whose true nature is obscured to the people around him, but Joe managed to get along with him rather easily. He is very much focused on his research on the many Magical Minerals found in the star ruins area. Dr. Zeta convinces Joe to help him in his research to unlock the island's secret as the story progresses.

Dr. Zeta is a bipedal lizard-like person with sea green skin, a big tail and can often be seen wearing an open oversized lab-coat that carries some pens and sometimes a tablet for research. Under his lab-coat, he can be seen wearing a dark grey shirt that covers up his chest. His face isn't very detailed as he often dons a serious or neutral expression.