"Caesar Silverberg (シーザー・シルバーバーグ, Shīzā Shirubābāgu?) is the main strategist for the second Fire Bringer forces and a student of Apple's. He is 16 years old during the second Fire Bringer war, and a member of the famed Silverberg family from the Toran Republic - Caesar is the grandson of Leon Silverberg and the son of tactician George Silverberg, as well as a relative of the late Mathiu and Odessa, both key figures in the Toran Liberation War. He is the younger brother of Albert Silverberg, the strategist of the Harmonian and Destroyer forces.
Caesar initially offers his aid to Thomas and Hugo while at Budehuc Castle when attempting to escape from the surrounding Zexen army. He later shows up at the Chisa Village to aid the new Flame Champion. He firmly believes that the new Flame Champion is the only one who can properly rally the Grasslands forces, and also has a reasonably pessimistic outlook on the prospects of a war between Harmonia and the Grasslands - Caesar believed that it would take not just Zexen cooperation, but an alliance of all the states in the region to stop Harmonia. (Obviously, after Luc's treachery was discovered by Harmonia, this was not needed.)
Caesar is the youngest and most inexperienced of the strategists, though still possessing the talent his family is known for. Initially appearing to be a lazy and uninterested teenager, he possesses a keen and watchful mind and while he never demonstrates the elaborate plans of his predecessors, his cunning misdirections and ability to see the situation stripped of emotional attachment serve the Flame Champion well. Unlike some other strategists in the Suikoden series, he is well supported by Salome and Apple, fine strategists in their own right whose experience counterpoints Caesar’s precocious genius."
Source: Wikipedia, "List_of_characters_in_Suikoden_III", available under the CC-BY-SA License.