Marshor was an Idanian and a member of Idanian Intelligence. In 2373, Marshor came to Deep Space 9 when he received a message from Odo about Arissa. Marshor related Arissa's mission to Odo and Benjamin Sisko and helped Odo save Arissa from the Orion Syndicate assassins Sorm and Traidy. (DS9 episode: "A Simple Investigation", CCG set: Second Edition)