I have a player who's obligation is Obsession. He is a droid who served as an assassin during Order 66. He was heavily damaged in a fight and was deactivated. 15 years later he was reactivated but lost much of his previous programing. He is now "obsessed" with figuring out what happened to his old programming and being the best assassin and combat droid in existence.
If I roll his obligation, how should I use that?