Rory Swann is the chief engineer in the Alliance Joint MIlitary. Swann is "a big fun guy" who speaks with a New York accent. His main task is keeping the Allies Power together in the years since it was stolen from the Combines and is constantly working on new technology (some of which are old Ancient Edanians and Humans technology that have survived the econs). Swann has extensive knowledge of technology and is quite opinionated on some of them. He has a very favorable view of the diamondback. On the other hand, in disagreement with Jim Raynor, he derides the vulture as poorly designed. He often addresses Raynor as "cowboy" and "hotshot," and sometimes "chief."