Counselor Deanna Troi (Marina Sirtis) had an accent in the early seasons of Star Trek: The Next Generation, but it becomes less pronounced as the series goes on. As a half-Betazoid and half-human, Troi could sense the emotions of those around her, which made her perfect for the role of counselor aboard the USS Enterprise-D. Not only did Troi help the Enterprise crew work through their problems, she also acted as an advisor to Captain Jean-Luc Picard (Patrick Stewart). Troi’s abilities allowed her to tell when potential enemies were lying, which proved useful on numerous occasions.
