A girl in Sumino's class who is jealous that Sumino has become so close to Hinata. She asks Sumino not to go near Hinata anymore in exchange for her friendship. When Sumino continues to hang out with Hinata, Aya sends out an email to everyone in their class with a picture of Sumino and Hinata together, saying that Sumino took advantage of Hinata and forced him to go on a date with her. She constantly tries to tell Sumino that Hinata only talks to her out of pity.

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