Guardian Hearts are the swords used by the Astarian Military. They were forged by a very skilfull blacksmith, but now they are discontinued. The blacksmith refuses to make them anymore after meeting and falling in love with an +Anima woman who is a peacemaker, and now he is a peacemaker too. The blades were said to be the finest swords ever forged, with an edge as sharp the nothern winds and a balance like a circus trapize artist. In the +Anima timeline, none have been made for six years.