Her full name is Hikushibe Aya. She's a year junior to Poniko and Atsuko. However, she has a more dignified style than either of them.
Her basic setting ... is that she's a high school girl. She's physically weak, but she can study quite a lot. She's a member of the Pixiv club. (In the world where Poniko and others are in the Track and Field Club, she's not in the Pixiv Club, but the the Cultural Club) She's more of a solid person and an adult than Poniko and others. But, it seems like she slipped up somewhere on the somewhat deceptive form when becoming a member of the Pixiv Club.
She's mainly shown as a high school girl (blazer). With the exception of her Pixiv Club appearances, she hopes to be shown a lot more.
