Nidd was a male Klingon in the Klingon Defense Force in the late 24th century. He served aboard the IKS Rovlaq during the Borg Invasion of 2381, and was the senior-most officer, after Captain Drex, to survive that ship's battle with the Borg in defense of the Mempa system. With the number of warriors killed in the invasion, Drex was forced to promote Nidd to Commander and assign him as his first officer. The personnel shortage also necessitated that, in addition, Nidd serve as operations officer.
Nidd protested the Rovlaq's assignment, following the invasion, to escort refugees from Mempa to the planet Krios, feeling it an unworthy task for warriors. However, on approach to Krios, the Rovlaq and the refugee fleet were ambushed by a dozen Kinshaya ships. Nidd sent an alert to Klingon Defense Force Command, reporting that the Kinshaya were using Breen weapons and Romulan shields, before the Rovlaq was destroyed and he was killed along with all hands. (ST novel: A Singular Destiny)