Mitch Tennison (円谷光彦, Tsuburaya Mitsuhiko?) is a character in the manga and anime Case Closed (Detective Conan). In the English Manga, his name is translated to Mitch Tsuburaya.

Aoyma introduced Mitch as one of Conan Edogawa's three first-grade foils. These three match the traditional division "brains, brawn, and beauty". Mitch is an intelligent boy for his age and knows a little about many kinds of technology. Mitch is a well-read kid, who reveals to have basic knowledge about many things most of his friends wouldn't know about. Aoyama may have intended this to be the result of both his parents being teachers. He is also quite level-headed, though he still tends to panic in stress situations. Overall, Mitch is a kid with a cheerful and outgoing personality who likes to have fun

Mitch and his friends Amy Yoshida and George Kojima befriend Conan in grade school and form the Junior Detective League. Early in the series, Aoyama established that Mitch (and George) had a crush on Amy, who had a crush on Conan. Later, when Anita Hailey joins the group, Mitch falls for her. Mitch is also shown to be a big fan of Masked Yaiba.

Source: Wikipedia