kanade is the only one who altered her apperance using this angel computer program. Yurippe says towards the end that the shadow must have been created by using the same program for ncps... and she also said that she wanted kanade to fight the shadows, because kanade is a npc with that program. but in the last episode, kanade disappears. ncps cant do that xD and because she has yuzurus heart, she must be human... but why does the program work then???