Forgotten Myths | Rise of the Guardians Fanfiction

The Guardian of Emotions is the most recent guardian added to the team. Her job is to bring the many joyous emotions kids might feel throughout their childhood. Like all guardians, Grace loves her position and tries to help the children as much as possible, though that doesn't change her one and only setback-- no one believes in her. After all, why believe in a guardian you've never heard of before?
However, when the guardians' nemesis Pitch Black returns, the children's happiness and belief in all of the guardians begin to falter. What will happen when Pitch attacks and attempts to remove these guardians for good? What will happen when there is a new guardian to be chosen?