Commander Grann was a male Human and the ranking officer of the Sith Embassy on Manaan during the Jedi Civil War. He was killed by Revan in 3956 BBY during the Raid on the Sith Embassy.
Grann possessed an Echani Foil.
Grann is only referred to as such in a cutscene within Star Wars: Knights of the Old Republic, when the security guard at the receptionist desk sounds the alarm. Otherwise he is simply referred to as "Sith Diplomat."