|Ushiromiya Rosa右代宮 楼座O|
|Hair||Blunt Bangs, Brown, Hime Cut, Long, Straight|
|Body||Average Height, Pale, Young-adult|
|Role||Aunt, Daughter, Divorcee, Mother, White-collar Worker, Younger Sister|
|Visual novels||Main character - Umineko no Naku Koro ni|
Side character - Umineko no Naku Koro ni Chiru
|Voiced by||Koshimizu Ami|
Rosa is Kinzo's fourth child. As the youngest of her siblings, she has the least influence at the family conference. Her husband abandoned her shortly before the birth of her daughter and only child, Maria.