The Mother Queen was a female urnsor'is that inhabited the planet of Kashyyyk during the era of the Galactic Civil War. Two Wookiee members of the Myyydril tribe hired a spacer to eliminate this creature, and the spacer successfully completed the mission.
Belonging to the urnsor'is species, the Mother Queen was female and possessed a unique physical structure. She had four eyes and a mouth filled with large teeth located on her head. This head was connected to an abdomen featuring two light blue colored patches. Furthermore, the creature had six limbs and a tail, and her body contained a healing salve with medicinal properties.
During the Galactic Civil War, sometime following the Battle of Yavin, the Mother Queen instigated an infestation of her species within the Myyydril Caverns on Kashyyyk, the homeworld of the Wookiee. Surrounded by juvenile urnsor'is and protected by adult guardians, she became a significant threat. Chief Kallaarac and Nurse Yraka Nes of the Myyydril tribe both desired the death of this creature. Nes sought the healing salve contained within her body, while Kallaarac aimed to eliminate the beast to bring peace to the tribe. They contracted a spacer who successfully slew the parasite, and Kallaarac and Yraka rewarded the spacer for this accomplishment.
The Mother Queen made an appearance as an enemy in the Star Wars Galaxies expansion pack titled Rage of the Wookiees, which was released in 2005. Additionally, she was featured in the artwork for the "Quest" card "Queen's Healing Touch" from the Star Wars Galaxies Trading Card Game set Champions of the Force; this card shared the name of the quest given by Yraka Nes to the player, tasking them with killing the Queen. The Star Wars Galaxies game servers were shut down on December 15, 2011.