j´ai retrouvé le bon lien
http://ps2.gamespy.com/playstation-2/ico-ii/688379p2.html
"One of the most identifiable traits of the main character in ICO is the set of horns on his head. Lanning pointed out that horns are usually reserved for evil characters in Western tradition, and asked what the significance of the horns were.
Ueda´s answer was a practical one: He said that so often in ICO the camera would be zoomed out, and he wanted a way to highlight the main character. So he gave him horns, so that he´d stand out. He laughed, saying that everyone expected that he saw it in a dream or something, but the real reason for the horns was simple and practical."
enfin c´est pas l´interview dans laquel il est plus explicite dans ce choix mais c´est le seul qui marche ><
en fait l´histoire dans ses jeux évolue en fonction de l´avancement du jeu,c´est ça qu´est géniale!
bon il doit surment avoir le trame principale en ligne de conduite,mais autour tout peut être modifié à l´infini