tsukino mito (4th costume)
The fourth costume of Nijisanji's Tsukino Mito, as seen on Twitter.
Called the Taishou Roman, it is a white-red floral print kimono and purple hakama patterned off Taishou-era women's fashion. She also wears brown boots, red hair bow, and glasses.
This tag implicates tsukino_mito (learn more).