R2-C3

R2-C3 was an astromech droid who was owned by the Alliance, and was infiltrated into the Imperial Sector Plexus station near Keltos IV. Its duties as an Imperial droid were to monitor the Plexus' computer networks for illegal intrusion. As an Alliance operative, Seecubed (as he was known to the Alliance) recorded information from the Plexus' computers and transmits important data to the Alliance.

Source: Cracken's Rebel Operatives, by Paul Balsamo, et al., copyright 1994, from West End Games