The Ruling bloodlines are RH - , and they believe the RH + to be Invaders.
Yes something similar exists in the story too. There's a group of selective individuals with the middle initial D. in their names. They are a scarce few individuals scattered across the world but no one knows what it represents as the true meaning of their names has been lost in history. However, the ruling bloodlines are terrified of any individual with a D. initial in their names and consider the Ds to be their worst enemies.
Yes something similar exists in the story too. There's a group of selective individuals with the middle initial D. in their names. They are a scarce few individuals scattered across the world but no one knows what it represents as the true meaning of their names has been lost in history. However, the ruling bloodlines are terrified of any individual with a D. initial in their names and consider the Ds to be their worst enemies.