Nimira was the Mari Chief Examiner who investigated violent thoughts and charged B'Elanna Torres with a thought crime.
Nimira was the Chief Examiner on the Mari homeworld, a society of telepaths that had outlawed violent thoughts and believed it had eliminated violence. With no crimes for years, her job seemed almost obsolete. Gwynyth Walsh played her.
In Random Thoughts, Nimira concluded that B'Elanna Torres's momentary angry thought had passed telepathically to a Mari man who then beat another man, and Torres was sentenced to have the memory removed. Tuvok's investigation revealed an illicit trade in violent thoughts, and Nimira was shocked to learn her people had not left violence behind.