Nanaka Haibara

Height: 153 cm

A sharp-tempered schoolgirl from, who recently came back to Japan from overseas. She is an expert in Japanese chess and is in search for "that person" who can rival her. It is later revealed to be no other than Tenri (actually Diana), who have won a match against Nanaka. She says, after being defeated, she felt a pierced gap inside her heart ever since.