She later wears a brown t-shirt over a black long-sleeved shirt, with the yellow letters "HQ" printed on it and the hem ending above her belly button. After crossing the river, Saya changes into outfit similar to the school uniform, consisting of a white jacket with the zipper positioned below her breasts and underneath a black tank top, and a green miniskirt. While staying in the apartment she wears a light blue tank top with the hem ending above her navel and low-rise black sports shorts. Unlike the other female students in the group, Saya's attire has varied more from the school uniform and she has not worn it since leaving Rika Minami's apartment. Saya's physique is slender, however according to Morita she has bikini model sized breasts. She also as a visible pointed tooth that appears at times in the right side of her mouth. She wore contacts at the beginning of the series, but because her contacts dried out she has worn glasses ever since. Saya has fierce orange eyes and furrowed eyebrows. 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 is a teenage girl of under-average height with long pink hair which she mostly keeps in two pony tails on either side of her head. She does her best to keep Alice Maresato's innocence intact and will severely scold, anyone who would dare attempt to tarnish that to the any degree. Saya has grown very attached to Alice and acts like an older sister during the crisis. The only exception to this is Kohta, with whom she has a strange relationship.
Slightly self-conscious, she detests the fact that people neither address her by her first name nor look her in the eyes while speaking. Other than Rei Miyamoto, she is the only one who has a history with Takashi Komuro since they were children. It was before their escape from the mansion that she managed to make up with her parents. Despite coming from a prestigious family, she despises her parents whom she thought had given up on her in the crisis. She was the first to conclude that "they" respond only to sound.
A self-proclaimed genius, Saya's knowledge and deductive capabilities have allowed the group to escape from harm on multiple occasions. She is the daughter of an influential Uyoku dantai politician and her family is deeply involved in Japan's politics. Saya first made her escape with fellow classmate Kohta Hirano.