Takes place during the live action monster high movie grace is the daughter of Medusa and twin sister of deuce and also Cleo's best friend grace was the first person to find out about Cleo and deuce's breakup since she was there when the breakup occurred. Grace tends to wear sunglasses to protect people from her stone stare. Grace also has a way to unfortunately sneak up on people as it is one of her powers.book one of monster high the movie series.