Rommel is without an exception an imposing sideline character in Tezuka’s works, and usually in the military role suggested by his name. He was modeled on a German actor, and his slightly suspicious air is based on the roles played by his role model. He appears in several major Tezuka works, including Adventures of Rock, Astro Boy, Lion Books, The Amazing Three, and Black Jack. (Source: Tezuka In English)