So you're my next employer? Fine, I'll lend you my power.
More power for battle? Nice. That suits me just fine.
A gunner who came from another world. The gun that he possessed had a much longer range than any other known, and for this reason he was invited to join the armies of many nations in return for ludicrous rewards. According to the legends left about Rowgen, the other world he had come from was full of despair, and thus he hoped that Grand Gaia would amount to much more. However, wherever he went he witnessed the same horrible thing--humans fighting each other. This made him realize that Grand Gaia was, unfortunately, no different than his own ravaged world.