1.** was sent to you by mistake * *: Maybe he wanted to give it to someone else, but he accidentally gave it to you. In this case, he may try to get the gift back.
2.** Pay tribute to the idol * *: He may also be a fan of this idol and want to share his preferences with you in this way.
3.** Express affection * *: He may have some affection for you and want to approach you in this way. In this case, you can consider communicating with him directly, asking his intentions and showing your thoughts.
4.** Want to establish friendship with you * *: He may want to establish contact with fans of your idol in this way and gradually become friends.
The most direct way is to ask him directly what he means. Find out his intentions, then consider how to deal with this gift, whether to accept it or return it, or find an opportunity to thank him but refuse his kindness.