Girardot's elder son and member of Girardot's rebellion. He was a former member of Grandall. Rudiger quickly follows into his father's plans and protected him during the fight against Grandall's Anti-Rebellion force in training grounds. He is defeated and his father died after that. Being incapable of accepting his father's death, Rudiger tries to attack Parousia alone to exact revenge, but the Arthias rebels stopped him. Although Rudiger didn't trust them, since they were part of his father's demise, he accepted on working with them against Strife. He joins the Arthias only if Feofan in Chronicle 15 is defeated after him.