猫屋敷まゆのママさん。
’ニャー’、’ニャン’と言う口癖だから、こういうのが似合うかな…と思った。

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Source: post #8369722
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It's Nekoyashiki Mayu's mama.
I thought this kind of outfit would suit her due to her habbit of going "meow, meow".