Natsumi
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Natsumi is Hakase's granddaughter. She is 14 years old. She often treats Kakeru like her little brother. Natsumi can be bossy at some times, but she can get lovey-dovey when Hiroki saved her life in Episode 36 of Season 2 from Pink Monkey. Natsumi can be terrible at cooking, which made Hakase and Kakeru puke.
