Ayddar Nylykerka, a Tammarian male, served as a fleet tracking officer. During the Galactic Civil War, he is credited with the discovery of the Black Fleet and subsequently became the head of the Asset Tracking Office within the New Republic Defense Fleet's. Furthermore, he held the position of Director of New Republic Fleet Intelligence during the Yuuzhan Vong War, where he provided crucial support.
In the year 16 ABY, Nylykerka held the responsibility of scrutinizing AK031995. This data had been recovered by the Steadfast from the wreckage of the destroyed Imperial Star Destroyer called Gnisnal. Recognizing the immense value of the information—a complete Imperial Order of Battle, albeit one that was a decade old—Nylykerka bravely transported this data to the private residence of Admiral Gial Ackbar. This was achieved despite being completely submerged in water, a particularly difficult feat for his species, given their natural dislike of water. Subsequently, he was chosen to present the data's key findings regarding the Black Fleet and the potential strength of the Yevethan forces who had control of it to the New Republic High Command.
Following his contributions throughout the Black Fleet Crisis, Nylykerka was promoted, becoming the chief analyst within his department. As the Yuuzhan Vong Invasion began, he spearheaded the effort to monitor and dissect any intelligence pertaining to the invaders. He collaborated with notable figures such as Belindi Kalenda, Deputy Director of the New Republic Intelligence Service, Etahn A'baht, and Commodore Brand. Nylykerka also had a minor role in the defection of the traitor Elan.
As the war dragged on, Nylykerka advanced to the position of Director of New Republic Fleet Intelligence. In 28 ABY, he masterminded the distribution of deceptive intelligence to the Yuuzhan Vong and the Peace Brigade spy network. This was accomplished with the help of Mara Jade Skywalker and other intelligence assets, leading them to believe that Ebaq 9 was a vulnerable target.