Dupont was a male Human colonist on Serafin's Planet in the mid 24th century. As such, he had suffered from a debilitating and disfiguring genetic disease, until a seismic event on the planet unearthed a mysterious radiation source. This radiation cured the disease, but left the colonists with the need to feed on the life-force of other living beings.
Dupont was one of eight colonists who survived the destruction of the planet by seismic forces. Geordi La Forge was briefly jealous of Dupont, having mistakenly assumed he was in a romantic relationship with his old friend, Dahlia Santorini. (TNG comic: "Serafin's Survivors")