Chris Erwitt is a member of the group of astronauts Agravity Boys. He serves as the group's doctor. Chris is rational and pratical. He is naturally kind, cheerful and friendly, but sometimes become exasperated with the antics of his friends. He believes himself to be the one who believes in friendship the most of his group. Unlike the rest of his friend, he hasn't shown interest in girls and gets annoyed when his friends obsess about them. He also dislikes being treated like a girl or being mistaken for one. In contrast to his usual mindfulness, he is awful at coming up with good names for things.