Exert

Didn't the world that was visible through the lense have automatons that inspired the ones made by jonas and them? If I am remembering correctly and not tweaking, then my guess is that he is one of the ones that existed through the lense. If that is the case, and based off of the name "thunder warden" my guess is that he is an ancient automaton that does something to control temporal storms, either strengthening or weakening them. TLDR: I think Dave is a pre lense automaton (Ones that inspired Jonas's robots) that controls temporal storms.