Transfer student in Mouri Ran class, Eisuke is a person with extremely bad luck. He's constantly bumping into or falling over something. However, his clumsiness belies a sharp intellect and keen talent for observation. He figured out that Kudou Shinichi and Edogawa Conan were the same person before even meeting Conan and managed to force to the truth out of him later. He falls in love with Ran, and is later revealed to be the younger brother of Mizunashi Rena.