S'marus is a very attractive Romulan female of average height and slim build.
S'Marus is a fanatic on the subject of the Federation, having lost a brother and an uncle in clashes with Star Fleet over the past 15 years. She hates, (ears, and mistrusts UFP characters, and is only too happy to carry out orders to double-cross the Fife boarding party contingent.
Unlike a Human officer, S'marus harbors no particular resentment toward Tal for taking the post she should have had. However, though she and Tal see eye to eye on the subject of the Federation, she secretly despises him as a failure. She also feels nothing but contempt for Avolus, particularly when the latter is appointed as her nominal superior.
S'marus has a haughty, arrogant manner. She embodies the worst of the noble Romulans. Few of the redeeming features of Romulan character shine through her disdain for weakness.