Soldier of Zero

Louise summons Saito as her familiar, but she gets Saito from a bit of a more war-torn world. This Saito has learned to work with his wits to survive, and he was lucky enough to bring a few things with him. No super characters (not more so than cannon, anyway) and hopefully realistic development. Guile hero Saito, but still with Gandalfr. Be warned, the enemies may get nastier too.