Gift for my friend [help pls🙇‍♀️]

Hey my friend really (I mean REALLLLYYYYY) loves TGCF

I want to make a Chay charm for her (Keychain of sorts) of something that's a reference to this series, could you guys help me by telling me anything specific that I can make for her? Maybe something a character always wears/symbol? Her favorite is hua cheng and she's read all the books and everything.