User blog comment:B214/Volume 23 discussion blog/@comment-201.215.165.7-20170319153954/@comment-31137559-20170319155646

Your words make no sense. Rudiger Rosenkreutz's son was born with a Sacred Gear because apparently former humans/reincarnated devils can have children born with Sacred Gears. His son's Sacred Gear was very harmful to him. There are certain Sacred Gears that do that as stated in Volume 19. His son eventually died because of his Sacred Gear.