David is not special. David wakes up on another world due to pure chance, and because of that chance, he is allowed to let his personality grow. . . As the side character. As stated prior, David is not special, but Zerrious is. He almost has the names to become a god, and no matter how much he tries to leave his old self behind, he will always be to the side, as Sigurd or David. And you know what? That's okay.