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Mayumi Oda (小田 真由美 Oda Mayumi) is one of the five candidates for two Vice-Presidential positions in the Student Council.
Student Council Formation Arc
After the Student Council gains a new president, Mayumi sends an application to become a vice-president. She was later selected to be one of the top five candidates. Later after school, she was called to wait by the Interview Room, writing her answers on a questionaire. After she's done, gives Ryu her answer sheet, albeit annoyed. After being informed that she has to wait, she complains calling him annoying as she walks and ignores him. She asks Ryu if the interview will start soon as she is busy and requests to be informed when it starts. She and the others are soon told to quietly sit and wait. During her interview she acts quite nice to the judges, having given good answers.