Magic Knight Rayearth Unofficial Website

Presea is the only person in Cefiro capable of make weapons for the Magic Knights, these weapons are made of a mysterious mineral called Escudo which only can be found in the Lake Eteruna. Presea after making the swords of the Magic Knights died and it is supposed that she came back to life in the second season (but the truth here is that the Presea of the second season is her twin sister and the only difference is a mark on her chest).

The swords that Presea made for the Magic Knights are for the exclusive use of the Magic Knights, and have a kind of "defense system" , Hikaru's Sword if it is touched by any other person becomes a great flame(that is how Zagato's spell over Lafarga was broken), Umi's Sword becomes water if someone else touches it, and Fuu's Sword becomes really really heavy.