Anya was an allasomorph who was the governess and legal guardian of Salia, the future head of state of planet Daled IV. She was of a ruthless and pragmatic nature, believing it perfectly justifiable to kill a problem individual rather than negotiate.
Anya came from the third moon of that planet. When with Humans, she typically opted for the form of an elderly woman, but occasionally changed her appearance as the situation dictated. When Salia's parents were killed in the ongoing war, Anya and Salia were transported by the Federation to the neutral planet Klavdia III where she raised the young dauphin.
When it was time for them to return to their homeworld, the two traveled aboard the USS Enterprise-D in 2365. She was intensely concerned with the safety of her young charge, and attempted to restrict repairs initiated by Lieutenant La Forge, as well as requesting the death of Crewman Hennesey aboard the Enterprise-D because of his contagious disease. When the request was not met, Anya became a raging monster intent on murdering the patient herself. Security had to restrain her. To dissuade Wesley Crusher from pursuing Salia as a romantic interest, she transformed into a fierce creature.