Umineko Tweak has released an updated patch of Rondo and the Witch of Reasoning which gives the game text boxes. Can be found here
Lion is the child whom Natsuhi Ushiromiya abandoned from nineteen years ago. This person appears in the seventh game, Requiem of the Golden Witch, under the circumstances that Natsuhi accepted the child that Kinzo had given her to raise in order to prove her capabilities as a mother. It is suggested that because Lion exists, Beatrice, the Golden Witch doesn't exist, creating an alternate set of events to occur on Rokkenjima in 1986.