Yalen was a mercenary in the Dendarii Free Mercenary Fleet. He was part of a group of four Dendarii that held a wine shop clerk hostage in London on Earth in a dispute over payment, and surrendered to the Earth authorities when ordered to by Admiral Naismith. He was bailed out with his fellow renegades by Naismith's clone. Yalen owned a bowie knife.
- Brothers in Arms chapter 3