Cotton is Harukas forgotten stuffed animal. They have a heart-aching reunion in the land of forgotten things, when Haruka is escaping some of Teo´s bullies.
Haruka brings Cotton with her in her escape, and says that she´s sorry about forgetting Cotton. Cotton has a hard time forgiving Haruka, but after a while Cotton admits that he has missed Haruka too. After that Cotton helps Haruka find her missing hand-mirror, and is a really big help in the toughest situations.