Arvel Skeen was a male human serving in Vel Sartha's team. He participated in their mission on the planet of Aldhani.
Skeen voiced his disapproval when Vel Sartha returned to their camp with Cassian Andor, the latest recruit, particularly since the operation was only three days away. Sartha, however, firmly dismissed his objections. When Gorn, an Imperial Lieutenant stationed at the Aldhani Garrison who was also their inside contact, arrived at the camp, Skeen informed him about Andor, a development that also irritated Gorn. Sartha ignored their concerns and called a meeting to present the plan to Andor. When Andor questioned the plan, deeming it a suicide mission, Skeen retorted that they were confident in its success and that only someone crazy enough would attempt it.
Following the successful Aldhani heist, the infiltration team paused on the moon of Frezno to seek out Dr. Quadpaw in an attempt to save Karis Nemik's life. While awaiting the procedure's completion with Andor, Skeen proposed abandoning the rest of the team and escaping with the stolen credits, suggesting a fifty-fifty split. As Skeen persisted, Andor, perceiving him as a threat, used his MW-20 Bryar pistol to shoot and kill Skeen. Seeking an escape after Sartha called for Skeen, Andor informed Sartha and Quadpaw about Skeen's treachery and his subsequent death.
Ebon Moss-Bachrach portrayed Arvel Skeen in the Andor television series. Although 2023 Topps Star Wars cards identified Aldhani as Skeen's homeworld, Pablo Hidalgo from the Lucasfilm Story Group clarified that this was incorrect.