Masumi Sera

Masumi Sera is a selfproclaimed high school detective and practitioner of the martial art Jeet Kune Do. After making a mostly correct deduction during a murder case it is hinted that she made a mistake on purpose she transfers to Rans high school class. She seems to know that Conan is a detective. Sera can fight at either the same or better level as Ran. She transfers to Ran and Sonokos class at Teitan High. Since three years ago shed been living in America with her parents. She claims shed rather live in Japan where she was born and raised so she came to Tokyo and is currently living in a hotel.