The Filly of Shadows

The Cutie Mark Crusaders were a good group of friends. They always stood side by side and nopony would be left behind! However, the new filly may cause some trouble for the friends. She even gains attention from the Princess of the Night herself. Will they befriend this strange new filly? Or will their friendship be torn apart by the shadows? (Prequel to Dangan Ronpa MLP)