Yorda is a mysterrious, young girl in ICO. Ico, the game's main character, discovers Yorda trapped in a cage in a castle after himself had been left for dead in the same castle. Ico along with Yorda try to escape the castle using Yorda's ability to open specially sealed doors that block access to various parts of the castle. During their escape, Yorda is constantly under attack from shadow monsters who are trying to bring her back where she "belongs". As the story progresses more is revealed about Yorda's role in the castle and her relation to The Queen and the shadowy monsters who are attacking her.