Detective Conan Li's new role, who can tell me who he is?

Naughty personality, but strange behavior, often tracking Conan and his party's whereabouts, the purpose of the characters is particularly elusive. The waiter working in the restaurant claimed to be a private detective hired by Hatsune Hatsune. Later, he became Richard Moore's apprentice. With strong observation and reasoning ability, Sera Masumi seems to be interested in him. In document 800, when Dambert Moore called the detective "Bourbon" sent by the black organization, he received calls from Okiya Subaru and Sera Masumi at the same time. In the 808 file "Late Grave Sweeping", An Shitou put a toothpick in front of the grave of the dead policeman Date Wataru, and there was a short message from Date Wataru in his mobile phone, which seemed to have a good relationship with An Shitou. Probably the first place in the police academy that Officer Ida said. In document 8 17, An Shitou, together with Sera Masumi and Okiya Subaru, discovered the identity of Haiyuan Ai.