He is known as Aya (アヤ), the name that belongs to his sister who is in a coma. His parents were killed and his sister run over by Reiji Takatori, and thus he joins Weiß seeking revenge. Aya's weapon is a katana named "Shion" after the previous owner and Aya's teacher. Before Aya became Weiß, he was a member of Sendai Kritiker, Tsushima Kritiker and Tokyo Crashers. Aya's car is a white Porsche 928.
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