Deanna Troi ( Marina Sirtis ). Daughter of Lwaxana Troi and Ian Andrew Troi, Deanna was betrothed at an early age to Wyatt Miller through the Betazed custom of genetic bonding.   They never married though since Wyatt chose to join the Tarellians in search of a cure for Tarellian plague.   Deanna also found out later that she had an older sister Kestra Troi who died when Deanna was only an infant.

Deanna is fond of stories about the American west since her father read her tales about them.  She studied psychology at the University of Betazed prior to her joining Starfleet.  While a psychology student on Betazed she became romantically involved with William T. Riker, later to be 1st officer aboard the Enterprise D.    Troi had hopes of a serious commitment between the two of them but Riker chose to take an assignment aboard the USS Potemkin.   Troi graduated from the academy in 2359.

Deanna Troi is empathic although she cannot read or feel certain races, notably Ferengi.   Her greatest passion seems to be for chocolate (see recipes to try a rich chocolate pie named in her honor).