Kayo is Kazuto's grandmother. After Kazuto's mother remarries and moves away, Kayo and Kazuto live together. She takes a liking to Rio and Aras, whom she calls "Ryou-chan" and "Aa-chan", and is happy that Kazuto has made new friends.
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Kayo is Kazuto's grandmother. After Kazuto's mother remarries and moves away, Kayo and Kazuto live together. She takes a liking to Rio and Aras, whom she calls "Ryou-chan" and "Aa-chan", and is happy that Kazuto has made new friends.
