Sunni Moon (mirror)

Sunni Moon, the mirror universe counterpart of Sunni Moon, was a "free agent"--an assassin, mercenary, Stephen April's personal "hit-woman" and one of his several lovers. She was also, simply put, crazy--a psychotic, murdering maniac who took care of the "dirty deeds" for April, acting as his "long arm" in dealings with others.

In 2385 Sunni's twin sister, Kitti, an agent of the Klingon-Cardassian Alliance, infiltrated the ISS Arcadia, passing herself off as Sunni in an attempt to assassinate April, but failed and was killed by Tabatha Brisk, for which Sunni longed to "get even". Sunni jealously hated Eve Ordalani, who goaded her in a constant rivalry.

Despite her lunacy, Sunni was generally loyal to April and the Empire. (Star Trek: New Empire)