Kazuki Kazami

Kazuki Kazami is the biological elder sister of Yuuji Kazami, a girl of staggering intellectual capability who developed her own unique technique known as 'Compressed Memory Method.' She vanished during the infamous Takizono Academy bus accident several years prior and was subsequently declared deceased. Her existence serves as a pivotal thread connecting the hidden pasts of both Yuuji and Amane Suou, making her one of the story's most enigmatic figures. Though she projects an air of cool indifference toward the world at large, she harbors an almost obsessive and overwhelming affection exclusively for her younger brother.