Moonlight Boy

Along the sea shore, Guts' party came across a young male child who not only looks similar to Guts and Casca but shows an attraction to both of them. When Guts began to be consumed by the Berserker Armor during a fight with Ganishka's monsters, the boy was able to telepathically call him back to his senses before vanishing as mysteriously as he appeared. He appears again on the Sea God's Island when Casca tries to save it. ~!Griffith is actually sharing the body with Guts and Casca’s child. Femto raping Casca corrupted her unborn child with Guts; that corrupted kid looked like an unborn embryo and was called the Demon Child. The child protected Casca and Guts on many occasions. However, the Apostle Egg of the Perfect World later swallows the embryo. The Demon Child later evolved into an infant inside the Apostle Egg, and later Griffith used the infant’s body for the incarnation ceremony. Therefore, the two now end up sharing the body, and Griffith transforms into Guts and Casca’s child on nights of full moons.!~