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 as of the 24th century. A human-Betazoid hybrid named Deanna Troi served on the USS Enterprise as the ship's counselor as of 2368.

Externally, Betazoids were identical to human beings. (COMIC: Assimilation²)