Betazoid
From Tardis Wiki, the free Doctor Who reference
In a parallel universe, Betazoids were a humanoid species who were members of the United Federation of Planets in the 24th century. A human-Betazoid hybrid named Deanna Troi served on the USS Enterprise-D as the ship's counsellor in 2368.
Externally, Betazoids were identical to human beings. (COMIC: Assimilation²)