Arcueid Brunestud is a powerful vampire and one of the main characters in the visual novel and anime series Tsukihime. Known as the White Princess of the True Ancestors, she plays a crucial role in the storyline. Arcueid is characterized by her striking appearance, with long blond hair and red eyes. Despite being a vampire, she possesses a sense of purity and innocence. Her mission is to hunt down dangerous vampires known as Dead Apostles. Throughout the series, her relationship with the protagonist, Shiki Tohno, develops, revealing her complex personality and the struggles she faces.