Deanna Troi

Deanna Troi is a "" character. Actress Marina Sirtis played the character on the television series and several movies. 
Troi served as the ship's counselor. She is half-human and half-Betazoid. She can sense how others feel. 
She was born on March 29, 2336 on the planet Betazed. She had an older sister, called Kestra. She attended Starfleet Academy between 2355 to 2359. 
She also attended the University on Betazed were she studied psychology.