In Chapter 220 of the manga she even tries to poison Futaba by ruining the cookies they were going to use for bakery class. Like Airi and Mayumi, she is jealous of Futaba for the time that she spends with Satou. In the anime, she shows true concern and friendship for Airi and Mayumi with her love for Satou occasionally getting the best of her, but in the manga she acts much more selfishly.

Her selfishness can also be seen in the ending sequence of the first season Airi and Mayumi's dreams are of themselves and the rest of the squad playing soccer with Satou, while Shiori's dream consists of only herself and Satou (again, playing soccer). Mayumi seems to be the only one who knows that Shiori wants Satou for herself. However, later Shiori stole Airi's erasers (that were planned for Satou) and only Mayumi notices this, but is too freaked out to speak. She even pretends to be happy and surprised, until Airi discovers it and scolds her.

Although she encourages Airi with Satou, she shows her true colors in Episode 5 of the second season, when she writes her name on Satou's eraser and makes Yoshioka think that he wrote Shiori's name. Shiori is best friends with Airi and Mayumi. Shiori poisons cookies intended for Futaba. In Chapter 220, when they bake cookies for Satou, she even tries to cut her hair as an ingredient. Shiori loves Satou and will do anything for his love, even betraying her friends.

She also seems to be the most psychotic of the three girls she often wears a happy face while extremely angry (as seen in episode 2 of season 2) or while doing shocking things like trying to poison Futaba (in chapter 220 in the manga). In truth, she is very sly and selfish and will often look for ways to get Shinya's love all for herself, in spite of her friendship with Airi and Mayumi. She is always calm and kind towards her friends, though this is merely a deception. She often wears jackets accompanied with shirts and skirts. She wears her long brown hair in twintails.

Shiori ito