|Release date||6 December 2004 (Update)|
|A large ninja monkey wielding two scimitars.|
Duke replaces Kruk as head of the Ninja Monkey Guards of Marim after the events of Monkey Madness II. He can be spoken to post-quest to receive 2 x 50,000 XP rewards in Magic, Ranged, Attack, Defence, Strength, or Hitpoints. He can be found on the hill above the gate.