Heart Kreuz

Heart Kreuz was a legendary blacksmith responsible for the creation of most of Erza Scarlet's armors.

History
Heart Kreuz was a legendary blacksmith and one of the few who could meet Erza Scarlet's high standards for equipment. Heart Kreuz created Erza's normal, casual armor, named the "Heart Kreuz Armor", as well as her sword and many other suits of armor in Erza's possession that Erza could instantly summon onto her person through the use of Exquip Magic.

Trivia

 * In both Fairy Tail and Rave Master, "Heart Kreuz" was primarily a fashion company that sold clothes as well as suits of armor.