The child who Natsuhi Ushiromiya abandoned from 19 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.
Because the child's gender was uncertain, Lion was given an androgynous appearance.