yamagami karuta (1st costume)
The default outfit of Nijisanji's Yamagami Karuta, as seen in post #3661412.
Her default outfit consists of a white kimono top that is cut at thigh-level, obi, sash, pom poms, black detached sleeves, a wide red hakama with large hip vents, tengu-geta footwear, and a tokin hat.