Duc

 is a wandering merchant found near Shady Sands around 2161.

Background
Per his description, Duc is a wandering merchant of Asian descent. One of his regular trade routes spans to Shady Sands; he will offer to safely escort the player there if asked. The trip will take one day.

Other interactions
If the player has rescued Tandi from the Khans prior to encountering Duc, he will congratulate them for doing so.

Appearances
Duc appears only in Fallout.