Jyll Xon held the position of secretary within the Metatheran Cartel's operations office located in Gadrin. Following the relocation of the majority of the Cartel's staff to their jungle base, she and her direct superior, Manod Fea, were the remaining individuals operating from the offices. Xon maintained a constant presence in the office, even during Fea's daily two-hour absences.
Xon's intellectual capacity was not remarkable. While competent in her assigned tasks, she relied heavily on personal notes and reminders, and she kept her access codes written down on a piece of paper affixed to the underside of her desk. Her unusually broad smile, extending from one side of her face to the other, occasionally frightened small children. Furthermore, she suffered from allergies to several plants native to Cularin, with exposure to Jo trees resulting in loss of consciousness and seizures, although these reactions were not considered fatal. Despite these allergic sensitivities, she had a fondness for flowers, and her partner back on Caarimon routinely arranged for floral deliveries to her.
A concealed transmitter was worn by Xon on her left wrist, enabling her to call for assistance from the Metatheran Cartel's security personnel.