The woman whom Yuuji calls "Master". She took charge of raising Yuuji when his parents passed away. She had died one and a half year before Yuuji enrolled to Mihama Academy. After her death, her friend, JB, became Yuuji’s guardian. Yuuji once said “She had a rough personality”. She is now buried among the mountains in Yamanashi Prefecture where she and Yuuji used to live together. [From Shiori-chan's review]