Woman fleeing the Orion Syndicate who began a romance with Odo, unaware that her own memories had been erased.
Arissa is a woman Odo meets in Quark's bar and who soon impresses him with her powers of observation. Arrested for trying to break into the station's computer, she tells him she wants to escape her work for Draim, a boss in the Orion Syndicate, and Odo hides her in his quarters while he investigates. The two become lovers.
In A Simple Investigation, an Idanian official reveals that Arissa is really an Idanian agent who was given a new identity, and whose memory was erased, so she could infiltrate Draim's organisation. After Odo saves her from Draim's killers, she returns to her married life, leaving Odo heartbroken.