User blog comment:B214/Talk About What You Want! 3/@comment-24098614-20150329012653/@comment-25032153-20150329032955

if you look at the volume 12 they say that his body now is that of a human dragon meaning that his children will be part dragon so Rais children would be dragons with devil magic of destruction and all his other children with the other girls will gain dragon powers based on what the ladies abilities and as they will be properly raised to not be perverts like issei.