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|Romanized Name:||Yukko no haha|
|English Name:||Yukko's Mother|
|First Appearance:||episode 9|
|Japanese VA:||山本圭子 (Yamamoto keiko)|
Mother Aioi, Yuuko's mother, has a middle-aged appearance and wears glasses. She was introduced in episode 9. She gets very cranky and tends to hit Yuuko and say "Do you know how late it is!?". Her real first name is unknown.