The Golden Witch and Endless Witch, and arguably the primary antagonist of the series. She is affectionately referred to as "Beato." She first appears in the "Tea Party" of Legend of the Golden Witch, where she confronts Battler over his refusal to accept that his friends and family were killed by magic, and challenges him to a game in which he must prove otherwise from Turn of the Golden Witch onward. A witch who has lived for over a thousand years, she is said to appear as a cloud of golden butterflies, and has the power to summon higher demons among the seventy-two pillars to serve her. It is said that humans can summon her to have their wishes granted in exchange for compensation, though she often acts whimsically. She is the one rumored to have given Kinzo ten tons of gold and served under him as the alchemic advisor to the Ushiromiya family. There are also rumors of a woman named Beatrice who was kept by Kinzo as a mistress in a hidden mansion on Rokkenjima called Kuwadorian until her death in the year 1967.

Umineko no Naku Koro ni
The affluent Ushiromiya family patriarch, Kinzo, is on his deathbed, and his family has assembled at their private island to discuss the division of his estate. As they bicker over their father's immense inheritance, a typhoon closes in, trapping them on the island. They suddenly receive an eerie word of warning...and then, in the dead of night, the murders begin. One by one, family members are discovered murdered in bizarre and inhuman ways. Some within the family turn to superstition, blaming it on a witch rumored to inhabit the island. But one of them - the young Battler Ushiromiya - refuses to accept the supernatural and vows to uncover the real killer behind the seemingly impossible slaughters. He soon finds himself confronted by the apparent witch, and enters into a life-or-death battle for the truth.