Yewl, a male human, held the rank of commander within the Imperial military. He was responsible for overseeing Hivebase-1, a space station dedicated to research and development under the auspices of the Tarkin Initiative. During the infiltration of Hivebase-1 by the Son-tuul Pride, who aimed to retrieve the memory banks of 0-0-0, Yewl commanded the defending Imperial troops.
The character of Commander Yewl first appeared in the canon comic book Doctor Aphra (2016) 18, published in 2018. The comic's story was penned by Simon Spurrier, with illustrations provided by Emilio Laiso.