Sayo Yasuda
Yasu is Kinzo and Kuwadorian Beatrice's child and was born due to the result of incest. Yasu is at the same time, Kinzo's child and grandchild. Yasu is the same person as Lion Ushiromiya, but only in the worlds where Natsuhi rejected the infant given by Kinzo. Yasu plays the role of Shannon, Kanon, and Beatrice and is the true antagonist of the entire Umineko series. Yasu loves Battler, George and Jessica—that's Kanon's love, Shannon's love and real Yasu's love (Beatrice's feelings for Battler). It's expected that Battler's sin is forgetting Yasu and breaking a promise after six years. Yasu was the child that fell off the cliff along with another servant 19 years ago, but had survived the incident. The child received an injury which made Yasu's body unable to make love (after Yasu learned the truth it became the source of the furniture complex and the duel between Shannon and Kanon). Genji and Dr. Nanjo saved the child, but kept this a secret from others to prevent another incestuous advance by Kinzo. At the age of nine, (age was lowered to ensure that the child wouldn't be found out easily) Yasu came back to Rokkenjima as a servant. Genji personally arranged Yasu's hiring, hoping to reveal the truth if a good opportunity presented itself. The manga adaption goes more into detail about Sayo's gender identity issues. While Sayo was born as an unknown sex, the cliff incident left her body mutilated on the lower half and she was raised as a female. Her not growing chest, the first menstruation that did not come, as well as her face that looked a bit like a boy for her on the first glance started developing her doubts concerning her own body, which grew worse day by day. The book she read on human's anatomy didn't helped her to know why too ( Since she had an accident, she may doesn't have a full crotch but just a scar ). As a result she started dressing as a boy and pretending to be "Kanon" believing it will make her life happier. This game brought her modest amount of mental stability. Genji and Kumasawa strongly supported it all the way. It is also mentioned that she had many complexes as a woman. After she finds out about the condition of her body she starts calling herself "furniture" believing she is incapable of love.