Ko Sornell, a Devaronian female, was a Mandalorian warrior who fought for the Neo-Crusaders throughout the Mandalorian Wars. She acted as a signals specialist during the 3963 BBY invasion of Zongorlu. Sornell, along with her young son Gheedor Sornell, was also present at the Essien landing. During the conflict there, her Basilisk war droid collided with a Galactic Republic command skiff near the shoreline, piloted by Captain Dallan Morvis, which resulted in her and Gheedor ending up in the water.
Alongside her husband, Haarm Sornell, she lived the wandering life of a Mandalorian, raising their three children: Gheedor, a young daughter, and a baby son. While they were on Dantooine, she shared that she was pregnant with her fourth child.
During a siege of the world Taris, Sornell was instrumental in setting up a communications and signals hub, engaging in combat with the Mandalorians across the technical zones. She chose to coordinate efforts on the planet under the command of Cassus Fett. He guided his forces to gain access to the helm comlinks, which broadcast over the open Z-band from Serroco.