Though she is a bit less optimistic than Ran, the two girls share many common things, including a special passion and pride for their respective detective boyfriends and a strong fear of the supernatural. Kazuha is an Osakian version of Ran Mouri. When Heiji invited Conan, Ran and her father to a culinary trip in Osaka, Kazuha furiously confronted Ran as her apparent rival over Heiji, but after the misunderstandings in their true relationship were cleared out, she and Ran quickly became best friends. At some later point, Kazuha added a picture of Heiji into her own charm pouch as a sign of her devotion to him.Īfter Heiji had met Conan and discovered his true identity, he kept talking about him enthusiastically, but since he neglected to mention that Kudo was male, Kazuha thought Heiji was entertaining annother love interest. As a reminder of this 'closeness' and for good luck, Kazuha fashioned two identical lucky charms, each incorporating a chain link from the cuffs, which she and Heiji have been wearing ever since. At one time, Heiji had had the unfortunate idea of locking each other together with a set of old handcuffs which had no key to unlock it as a result they involuntarily had to spend time together even on some rather intimate occasions (i.e., bathroom visits) before the cuffs could be removed.
Kazuha has been Heiji's friend (and not-so-secret love interest) since childhood.