Frankenstein only quietly chuckled and said " we are what people 5000 years ago would've called nobles, we were a race with immense power that watched and protected humans in seclusion, My master the Noblesse was the embodiment of power for Our kind, we called ourselves your descendant because my master once had a brother, he was exiled to this world and he ended up ruling it, The D in your names was one of the ways we know you are related to us for When in exile he is removed from being a royal thereby changing his name to D"