User blog comment:B214/Volume 23 discussion blog/@comment-31137559-20170419031334/@comment-29963364-20170419032903

The Sigurd Institution creates these "decendants" of the Original Siegfried by using his genetic material. They did this so that they could create compatible wielders for the Demon Swords (especially Gram). Basically they didn't want the most deadly weapons to Angels falling into enemy (at the time) hands.

The Warrior Institution trains children to be soldiers for the Church.