I'm guessing Nina refused to pay over ten bucks for a single Amiibo card online and decided to craft her own adorable Hazel Amiibo, but a true genius would go the extra mile and make her Hazel Amiibo come alive through advanced engineering (which I'm sure she tricked Coco into handling for her). Aside from one particularly odd-looking design, Nina has never had eyebrows of her own... or she does and plucks them clean. I don't know. Why wouldn't she favor an individual with more than an enough fuzzy brow for the both of them?