That person is more than likely the "Pirate King Edgar" character we heard so much about in Suikoden IV. If that's true, the image on the back of his coat is probably the exact same one as the tattoo on Kika's lower-back.
Speaking of Edgar, he seems to be the "swordsman of awesomeness" during these games. He has that "aura of power" that I get from people like Georg Prime and Luca Blight, especially with such a kick-ass title like "Pirate King". I'm suprised he was killed, and not Brandeau.