Shing-kur was a female Kressari who lived in the 24th century. After being imprisoned by the Cardassians in the Letau prison facility, she became Iliana Ghemor's closest lieutenant and confidant. She was the only one of Ghemor's group that knew her true identity.
Shing-kur was once an independent bio-research scientist (and was considered a genius) and lived on a planet in the Demilitarized Zone. In the year 2370, she was arrested by the Cardassians on suspicion of espionage and conspiracy and imprisoned in Letau. (DS9 novel: Fearful Symmetry)
Shing-kur spent the next five years in prison. In 2375, during the Battle of Cardassia, Letau came under attack by the Jem'Hadar and a Romulan vessel was forced down, damaging the facility. Ghemor deactivated the force fields in one of the cellblocks where Shing-kur was imprisoned. Joined by Telal and Zhag, she encountered Ghemor, then appearing to be Bajoran, and Rokai as they made their way through the facility. Shing-kur was with Ghemor when she learned her true identity and promised not to reveal it to the others. Shing-kur later transported to Harkoum with Ghemor, Telal, Mazagalanthi and Fellen Ni-Yaleii. (DS9 novel: Fearful Symmetry)
After establishing Grennokar on Harkoum as their base of operations, Shing-kur used Cardassian technology to establish control over Taran'atar. Shing-kur also spearheaded the plan to assassinate Intendant Kira Nerys and have Ghemor take her place. (DS9 novel: The Soul Key)
In 2377, Shing-kur, Telal, Mazagalanthi and Fellen Ni-Yaleii were captured by the crew of the USS Defiant on Harkoum and brought to Deep Space 9 for interrogation. After Cenn Desca revealed to Telal, Mazagalanthi and Fellen Ni-Yaleii of Ghemor's true identity, Shing-kur activated implants in their brains that released a neurotoxin that killed them. After Kira Nerys and the mirror universe Iliana Ghemor arrived to question her, Shing-kur gave a message to them from Ghemor, simply telling them "Trakor's First Prophecy". The mirror universe Ghemor identified the toxin and deactivated the implant, so when Shing-kur attempted to commit suicide, she was unable to. (DS9 novel: Fearful Symmetry)