Saya is a girl of under-average height with long pink hair which she mostly keeps in two pony tails on either side of her head. Her hair also has two thin, long bangs at the sides, two thin strands of hair over the left side of her forehead, and a spiky larger portion of hair covering the right side of her forehead. Saya has fierce orange eyes and furrowed eyebrows. She wore contacts at the beginning of the series, but because her contacts dried out she has worn glasses ever since.

Saya first made her escape with fellow classmate Kohta Hirano. She is the daughter of an influential Uyoku dantai politician and her family is deeply involved in Japan's politics. A self-proclaimed genius, Saya's knowledge and deductive capabilities have allowed the group to escape from harm on multiple occasions. She was the first to conclude that "they" respond only to sound. Despite coming from a prestigious family, she despises her parents whom she thought had given up on her in the crisis. It was before their escape from the mansion that she managed to make up with her parents.

She is 16 years old, 155cm tall, and her hair is pink as it brings out her orange eyes. She really can't stand the fact that Kuro is in the group as yet she despises her so much. Knowing Kuro is older than her and also highly intelligent, very skilled, and drop dead gorgeous yet seductive she wishes she could make her pay.

"Mark my words one Kuro Chi-san, you will pay you will pay...tell me how your sleeping easy how you're only thinking of yourself tell how you justify telling lies like it's your second nature I hope you die.....I so hate that Chi she's such a pain messing with Takashi"