This is a list of main characters involved in Zero's Tea Time. It also lists characters from the Detective Conan franchise who appear in some chapters of the volumes of Zero's Tea Time. The list of characters also include recurring Zero's Tea Time only characters (ex: Reiko Tsuruyama, Haro).
Rei Furuya (降谷 零,Furuya Rei?) a.k.a Tooru Amuro (安室 透,Amuro Tōru?) and codenamed Bourbon (バーボン,Bābon?) by the Black Organization is the main character of this spinoff. He specializes in detective work and information gathering. He posed as a private detective and became Kogoro Mouri's apprentice. He is later revealed as an undercover National Police Agency agent working to undermine the Organization.
Conan Edogawa (江戸川 コナン,Edogawa Konan?), age 6-7, is a Teitan Primary School student who is in fact the famous High-School detective Shinichi Kudo in his shrunken appearance and the main protagonist of the Detective Conan franchise. He lives in the same building has Cafe poirot and Rei is aware of him pulling the strings of the famous sleeping detective. He has only appeared in pictures and background appearances.
'Kogoro Mouri' (毛利 小五郎,Mōri Kogorō?), age 37, is a famous private detective reknown for giving his deductions during his sleep earning him the surname Sleeping Detective and has his detective agency just on top of Cafe Poirot. Rei is his apprentice and is aware that Conan is the one who makes his deductions. He has only appeared in background appearances.
Life as the member of the Black Organization Bourbon
Vermouth (ベルモット,Berumotto?) a.k.a Sharon Vineyard (シャロン・ヴィンヤード,Sharon Vin'yādo?) and Chris Vineyard (クリス・ヴィンヤード,Kurisu Vin'yādo?) is a black organization member who is subordinate to Rei and tasks him missions. She trusts him and has a strong acting and disguise talent.