Ai Kirishima

She was Yamato's best friend in elementary school. She gave a doll to Yamato which looked like her while she kept a doll which looked like Yamato before Yamato moved to Switzerland. When Yamato was gone, she was being bullied in school because she looked geeky. She changed her geeky look to a much more pretty girl during high school. She is one of the most popular girls in school because of her cool and tough nature and bullies others. Her lover relationship with Retsu is fake. Her exboyfriend was Mizuki, but later they broke up. She once again has a crush on Mizuki. She and Yamato make up on Chapter 8.