Duke Stone is Tony Stone 's son and is dragged into a fight he never belonged in. You first see Duke in his families home in Melanie Square running and hugging his returning father. During another scene Claudia threatens to hurt Tony's family if Inferno doesn't get what they want. Later you see Duke at an amusement park where he is with his mother and father as Reiji stalks his targets. That night there is an assassination attempt on Tony Stone's life, Eva Stone is sent to stay with Duke so it is easier to protect them. When Eva gets there Reiji is already there, he kills the mother and then kills Duke.
- Tony Stone is Duke's father.
- Eva Stone is Duke's mother.