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Kouyama Kayo / Ninja Outfit
"Gendai Ninjakko Zudan" #016 Kouyama Kayo
She's from Yamashina. She's a young ninja affiliated with the Kogitsune clan. She belongs to the Kyoto Fushimi school of the Kogitsune clan, and is the fourth ranking member of the female high school team. She is a first-year student at Edagawa Konan High School. Her hair is brown and fluffy.
Here are some more establishing details: (free posting)
https://fantia.jp/posts/2615360