An Aldean woman who appears beside Radue in When the Bough Breaks and shows Wesley Crusher the Custodian, the ancient computer that runs her people's hidden world.
Duana is a senior member of the community of Aldea, a legendary planet concealed behind a cloaking shield. She appears in the first-season episode When the Bough Breaks, set in 2364, in which the Aldeans, no longer able to have children, ask the Enterprise for some of its own.
After the children are taken, Duana looks after Wesley Crusher. She introduces him to the Custodian, the computer built by the Aldeans' ancestors that provides everything they need, and has to admit that nobody alive understands how it works.
Like the rest of her people she is suffering from radiation sickness caused by the damage the shield has done to the planet's ozone layer. When Beverly Crusher proves this, Duana supports returning the children and accepting Federation help.