In the office, Satoko accidentally left her personal diary in the conference room after a meeting. Amare, who had the next meeting in the conference room, found the diary. He had to leave for another appointment, so he gave the diary to his trusted friend, Priya, and asked her to return it to Satoko. Priya saw Satoko's name on the diary but didn't know her personally. She asked Jianyu to help because Jianyu worked in the same department as Satoko; however, Priya didn't mention Amare's involvement. Jianyu agreed to return the diary but, unbeknownst to Priya, Jianyu had seen Satoko place the diary in her locker earlier. Jianyu put the diary back in Satoko's locker instead of handing it to her directly. Satoko later finds her diary in her locker. Who does Satoko think returned her diary?

Provide a very brief response.
Satoko likely assumes that someone found her diary in the conference room and knew it was hers, placing it directly into her locker for safekeeping. From her perspective, this person could be anyone who had the meeting after her or someone who passed by the conference room and noticed the diary. Satoko has no way of knowing about Amare, Priya, or Jianyu's involvement unless told directly by any of the involved individuals. Since Jianyu placed the diary in her locker without informing her, Satoko would not specifically think of Jianyu as the person who returned her diary unless she had some prior expectation or knowledge of his action. If Satoko had no reason to suspect Jianyu or anyone else in particular, she might simply believe that an anonymous good Samaritan found and returned her diary without specific evidence to think otherwise.