Counselor

Definition from The Star Trek Encyclopedia: A Reference Guide to the Future 2nd Edition...

Counselor. Starship officer responsible for the emotional well-being of the ship's crew. A Counselors duties included providing individual guidance and advice to crew members, as well as periodic crew performance evaluations, usually performed with the ship's executive officer or other department heads. A counselor is also expected to provid advice to the ship's captain on command decisions.

Deanna Troi, Ezri Dax and [[Phillipa mathias have all served as Starfleet counselors.