^So in the Journey to the West event, a bunch of the Servants take on the roles of different characters from the original story. Artoria LA takes the role of Ox-Demon King and Nightingale takes the role of Princess Iron Fan, a married couple. Incidentally, Mordred takes the role of Red Boy, their child. Because of that, this ship became popular, and fan art of the three of them as a family started being made.