MangaGamer had announced during Anime Expo 2015 that it'll release a Steam version of Umineko-When They Cry. This version will feature an updated English translation of Witch Hunt, new sprites and the full original soundtrack. MangaGamer's 7th Expansion site can be found here.
Originally some sort of inner being in Eva Ushiromiya, she became a witch after Eva solved the riddle of the Epitaph. She was recognized as Beatrice's successor, and was extremely cruel. She often used her powers to kill and resurrect people multiple times (usually in brutal ways) before finishing them off. She is sometimes referred to in the text as "The Cruel Witch", and later on, "The Black Witch". She is the main antagonist in Banquet of the Golden Witch.