It says on the thief characters page in the wiki that this mission features Corbin but I'm not seeing any mention of him, so am I to assume you play as him?
Mea culpa. An old mistake that I only corrected now, after noticing it. I accidentally listed the mission as involving him, but I was mistaking it for a different mission and forgot to delete the link since making the original edits to the article. It's some unnamed thief instead of him.