Kei Karuizawa is a prominent character in the anime series 'Youkoso Jitsuryoku Shijou Shugi no Kyoushitsu e', also known as 'Classroom of the Elite'. She is a student in Class 1-D at the prestigious Tokyo Metropolitan Advanced Nurturing High School. Known for her beauty and charisma, Kei initially appears as a superficial and manipulative girl, aligning herself with popular groups to maintain social status. However, as the story unfolds, her character depth is revealed, showing vulnerability and a desire for genuine connections. Kei plays a significant role in the series, particularly in her interactions with the protagonist, Kiyotaka Ayanokouji, as she becomes an important ally and confidante.