A member of the stranded human colony on Orellius who, at the prompting of its leader Alixus, tries to draw Benjamin Sisko into the community by offering herself to him in 2370.
Cassandra is one of the colonists seen in the second-season Deep Space Nine episode Paradise. She has lived for ten years in a settlement where no technology will work, under the guidance of Alixus, who teaches that hardship has made them stronger.
When Sisko and O'Brien are stranded there, Alixus looks for ways to bind them to the group. Cassandra comes to Sisko's quarters at night to make him welcome, and he realises that she has been sent. He turns her away and confronts Alixus over the manipulation.
The incident is one of several that harden Sisko's resistance, which ends with the discovery that Alixus herself had hidden a device suppressing the colony's technology.