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The female protagonist of Kaguya-sama wa Kokurasetai ~Tensai-tachi no Renai Zunousen~ and vice president of the student council of Shuchiin Academy. She is a multi-talented genius who can do anything if she sets her mind to it, however, due to going up sheltered, it resulted in her lacking in several pieces of what might be considered common sense. Her main objective is to make Shirogane Miyuki fall in love and confess to her.
She has red tareme eyes, small breasts, and short black hair stylized in a folded ponytail with parted bangs & sidelocks. She usually wears the Shuuchiin Academy School Uniform with a red hair ribbon.
In her cold-hearted "Ice" form, she lets her hair down long and her eyes become tsurime.
She is voiced by Koga Aoi in the anime.