An aide to President T'Rina of Ni'Var in the 32nd century, a shrewd political operator who worries that her engagement to Saru will be used against her by Vulcan purists.
Duvin appears in the fifth season of Star Trek: Discovery, in the episodes Jinaal and Life, Itself, played by Victor Andres Trelles Turgeon. He manages T'Rina's political affairs as Saru takes up his new post as a Federation ambassador.
In Jinaal he is uneasy about the planned announcement of the couple's betrothal. He takes Saru aside and suggests that a compromise Saru made in committee, and T'Rina's backing for it, could become ammunition for her opponents, and that marrying an offworlder might damage her standing.
Saru, shaken, proposes delaying the announcement, which T'Rina takes badly. She makes clear that she values Duvin's skills but needs nobody to shield her, and the announcement goes ahead. Duvin is seen again at the wedding in the series finale.