Reiko

A thief that Megumi met in Osaka. She was first seen on episode 13 of the anime. She was saved by Megumi in a near-death experience. Along with Megumi, Genzō, and Fujiki, they've helped the police caught a yakuza. In later episodes, she helped Megumi find magic books, a bone, and a scroll (which of course, she obatined by stealing).

(Source: Wikipedia)