Holy swords are not widely understood, but there exists a secret known only to their wielders.
Ego swords.
Commonly described as blades imbued with a soul, these swords possess their own consciousness and choose their masters.
Whether it was the consciousness of a previous wielder, a soul instilled during the sword's forging, or perhaps a highly advanced artificial spirit, no one could say for certain, but holy swords judged for themselves whether a potential wielder was worthy.
Some were drawn to a fierce will to protect someone. Others were drawn to those who could contend for the title of the world's strongest. And some imposed peculiar conditions, like needing to be wielded as a pair, one sword for each twin.
In the case of the Holy Sword Virgo, passed down through the Barony of Virgo, the condition was singular.
[The wielder must be a pure maiden, untouched by any man's hand.]
Only a chaste maiden could be chosen by the Holy Sword Virgo.
