The sixth/New Year's costume of hololive's Roboco-san, as seen in post #3948048.
It's a red short kimono with frilled sleeves.
Her official hairstyle with this outfit is a short ponytail tied with a large red hair bow and a flower kanzashi.
The following tags are aliased to this tag: roboco-san_(6th_costume) (learn more).
This tag implicates roboco-san (learn more).