>>49784243
Her design strikes a good balance between more traditional and more derivative shrine maiden costumes while also having a lot of frills and other details, the ur-ZUNart. She has a pretty consistent amount of details across the various parts of her outfit, and those details work together fairly well. I particularly like her shirt's collar.
Her flattened ribbon with the pointy tips looks very unique, cute, and is instantly identifiable.
The way she's leaning back, combined with her unamused face makes her look really dashing, which stands out among the other shrine maidens who are either serene, carefree, or some combination of the two.
Her reddish blond hair is unique, making her stand out among the large number of blondehus.
Lastly, there is also the detail of her being from the future which, combined with the greenery around her, it creates this image of a naturalistic, arcadian far future, an interesting idea to think about.