Jidian Tarrow was a Shard of the Imperial Combine. Her counterpart was Miall Crathus, with whom she may have had a romantic relationship.
Tarrow was last assigned to protect Proconsul Kalistine on the Imperial world Serrofus Major, following the outbreak of civil unrest amongst the native Mastalekt population. She argued briefly with the proconsul about the treatment of the natives, shortly before the unrest was provoked and intensified by the fugitive Maber Castigon and suspected Rasa Herik Pammon (→LOTD).
Tarrow was killed by Castigon shortly afterwards, when he shot her during her attempt to get Kalistine to safety. During this encounter it became apparent that Tarrow and Castigon had once been friends, and that he had in fact previously saved her career in some way (→LOTD).