Gradius is a secret society in SaGa Frontier. Led by Roufas and headquartered in Roufas's Restaurant in Koorong, it does jobs that IRPO can not handle.
Gradius goes after Joker, who is searching for the secret of Cube, a rumored power source. Emelia does some missions on behalf of Gradius.
Gradius provides backup for Red's quest to take down Black X.