96猫 響希ナツメ
96猫 (ku-ro-neko = blackcat), also known as 響希 ナツメ (Hibiki Natsume)
A singer who became famous through NicoNico. Although 96neko is often drawn similar to Kagamine Len (not necessarily male, closer to tomboy), in real life she's actually a woman.
See 96neko_(hyt330) for her pixiv account.
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