houshou_marine_(ahoy!!_you're_all_pirates)
The 10th costume of hololive's Houshou Marine, debuting for her first solo 3D live Ahoy!! You're All Pirates.
In this costume, she wears a nun headdress, black short frilled dress with black detached sleeves, black gloves, white thighhighs and black shoes.
For her official hairstyle, she has very long red hair done in twintails held with a white hair ribbon.