Kazuki Kazami

Birthday: March 22 Height: 150 cm BWH: 76-57-78 Blood type: B Kazuki is Yuuji's elder sister as well as the one who taught him throughout the earlier periods of his life. Contrary to the norm, Kazuki was the center pillar of the family instead of her father. She was the one earning all the living expenses and no one could go against her. Despite her delicate and diminutive body, she has brilliant intellect and excels in quick-witted judgement to the point that she has been labelled as a genius. She is the same age as Amane, both of which attended the same school "Takizono Private" and was also an active member of the basketball team for the aforementioned academy.

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An unspecified time ago, she died in a bus accident. In the present, the memory of her death greatly affects Amane's and Yuuji's lives.

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In Grisaia no Rakuen, she survived the accident and Ichigaya retrieved her body and used her brain to run a super computer with the name "Thanatos." Unable to use her body—only her brain—she helps train the five girls to help Yuuji who is being held captive by his own organization. Kazami Kazuki uses a mechanical hand afterwards.

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In the end of Grisaia Rakuen, Kazami Kazuki reveals that the prosthetic hand that is used by her is just a fake.