First of all, a Kimono Princess shuns typical seasonal designs and colors. Pink for cherry blossom season? So 10th century...unless it's the kimono LINING! Vintage jazz-age patterns or modern ironic graphics are the most popular for new style kimono hime.
Collection-4 | ふりふ
Not only do modern kimono warriors shun white undercollars & sox, they sometimes even layer on frilly Western pieces to add a little spice.
Komatsu Nana 小松菜奈 for Kimono hime キモノ姫 magazine N°12 - Shodensha Mook - Japan - November 2014
And Kimono Princesses sometimes wear jewelry. (There's actually a reason Japanese women don't have a big history of wearing rings, necklaces and pins – kimono fabrics were often more costly than jewels, and nobody wanted to risk something snagging or AI YI YI putting a hole in the priceless fabrics. But new style kimonos aren't expensive – most of them are vintage – so even cheap costume jewelry is safe to wear.)