Dio's starting level is 30 and even though he appears to fight without a weapon, he summons a weapon that physically manifests his powers during battle, making him lethal in close and mid-range combat.
Unlike the other Grand Chase characters, you can create short cuts for Dio's basic skills and specials. This allows you to create a variety of combos. It also makes Dio easy to use for new players. http://grandchase.gamerage.com/guides/Characters_dio.aspx