About Deanna Troi
Deanna Troi was born on 29th March 2236, to born Ian Andrew and Lwaxana Troi near Lake El-Nar in Betazed. Her father, a human Starfleet officer died when she was just 7 years of age, leaving her to be brought up by her larger than life Mother, who is also ambassador to the government of Betazed, daughter of the Fifth House, Holder of the Sacred Chalice of Rixx and Heir to the Holy Rings of Betazed. Deanna’s older sister, Kestra was accidentally drowned when Deanna was still an infant.
Her first exposure to education was at Starfleet Academy where she attended the school from 2355-2359. Thereafter she went to the University of Betazed to study psychology. After studying Psychology at the University of Betazed, where she first met William T. Riker, she joined Starfleet starships, USS Enterprise (NCC-1701-D) and Enterprise-E as a counselor aboard the ships upon graduating.
Her lover Riker is eventually promoted to be the Captain of the USS Titan ship and along with Deanna, they leave together where she is promoted to be the Diplomatic officer of the ship.
Although still in love with Riker, Deanna has remained single, though she has had several lovers, the most notable being Worf, Chief Security Officer on board the Enterprise.
The Betazoid race has telepathic abilities. Due to her half-human heritage (her father was human), Deanna Troi has only partial telepathic abilities and is as a result rather an empath with clairsentience. In Star Trek: Nemesis, Troi has expanded her empathic abilities as she is able to connect to another psychic and follow that empathic bond to its source.
In this instance, her ability enables Enterprise-E to target and hit the Romulan vessel Scimitar, despite the fact that it is cloaked. She is also able to communicate telepathically with her mother and other telepathic Betazoids or races with sufficient aptitude. There are several species who are resistant to the telepathy and empathy of Betazoids, however, such as the Ferengi, the Breen and the Ulians.