In between their study materials on alchemy, Jyn finds a diary, the diary of someone called Rosianne. It tells the story of her attempt to stop Jyn’s father, the royal alchemist. The alchemist had found a way to extract fragments of people’s personality, in order to give them to someone else. Rosianne was one of the victims of this extraction. What happens to Rosianne? And for whom are those personality fragments?