"Itoi revealed that he used a certain episode of his childhood as the basis for Giygas' character. Apparently, when Itoi was a boy, he accidentally walked into the wrong movie at a movie theater. In the movie, he saw a woman getting raped near a river (note: his memory was wrong; it wasn't a rape). The images he saw were like "direct attacks to his brain". He was so shocked that when he returned home, he stayed silent and worried his parents. He says that he used those strong feelings of fear and shock as the basis for Giygas' character and dialogue."