Crona (クロナ, Kurona), infamously known as the Demon Sword Master (魔剣士, Makenshi), is a Sword Master who is known to be the biological child of Medusa Gorgon, initially aims to become a Kishin, and is the partner of the Demon Sword, Ragnarok. Crona is known as one of the reoccurring antagonists in Soul Eater .