Arcueid originated from nothingness, simply as a product to realize the pointless goal of "the strongest True Ancestor." She was created to make her into a weapon, the executioner of fallen True Ancestors and of the most powerful Dead Apostles. Although she is a princess and very strong individual, she behaves rather whimsical and childish from the centuries of loneliness being used as a tool, but she is very wise and learned about history as she is over 800 years old.