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Arcueid Brunestud
Identity: A carefree, immature, yet intellectual princess
Background: She is a True Ancestor, a manifestation of the will of the planet. True Ancestors have a flaw of desiring blood, like their progenitor - Crimson Moon. However, she had not drunk blood until a mage named Roa tricked her into drinking his blood. He became a Dead Apostle with a fraction of her power, while she had to suppress her urge for blood from that point forward. After that, she established a new cycle where every time Roa was reincarnated, she would visit the world outside the castle, kill him, and then return to sleep.