OVA
Description
Kojou Akatsuki is a 16-year-old student at Saikai Academy on Itogami Island. Initially seeming ordinary, he is the immensely powerful vampire known as the Fourth Primogenitor. His transformation occurred three months before the main events when he shielded his younger sister Nagisa and the original Fourth Primogenitor, Avrora Florestina, during a terrorist attack at Fairy's Coffin. Suffering near-fatal injuries, Avrora transformed him into her blood servant and then commanded him to destroy her, transferring her powers and title. This event caused significant memory loss regarding Avrora, though fragments resurface during conflicts like his battle against Giada, the Third Primogenitor disguised as Avrora. Yukina Himeragi later fully restores his memories via a ritual.
Physically, Kojou possesses bluish-silver hair and blue eyes that shift red during heightened emotional states like anger or arousal. His vampire nature grants fair skin due to sunlight aversion and a well-toned physique. He typically wears Saikai Academy's uniform: a white button-up shirt, black pants, a blue undershirt, and a white hoodie.
Personality-wise, Kojou exhibits kindness, empathy, and a strong protective instinct, particularly toward his sister Nagisa due to her fragile health. This protectiveness often manifests as overbearing concern, leading others to perceive a sister complex. Generally carefree and sly, he possesses a volatile temper when provoked. Leadership qualities emerge through his indomitable will and supernatural charisma, enabling alliances with former adversaries. He remains largely oblivious to romantic advances from multiple female characters, attributed to his focus on Nagisa.
As the Fourth Primogenitor, Kojou wields enhanced vampiric abilities: superhuman strength, speed, durability, regeneration, immortality, and heightened senses. His signature powers involve summoning twelve familiars—manifestations of his vampiric energy—each corresponding to a zodiac constellation with unique capabilities. Early on, he struggles to control them due to refusing human blood, but drinking blood from specific individuals like Yukina Himeragi or Sayaka Kirasaka grants command over individual familiars. By the series' conclusion, he masters control without blood consumption as Avrora's chosen successor. Key familiars include Mesarthim-Adamas (diamond manipulation), Al-Meissa Mercury (devouring space/dimensions), Regulus Aurum (electromagnetic energy control), and Alrescha Glacies (water/sub-absolute-zero temperature control). Additional abilities encompass "Cleansing" (reality warping via physics alteration), Shikigami summoning via talismans, precognition under extreme stress, and mist transformation.
Kojou's relationships are central to his development. His familial bonds include Nagisa, whom he fiercely protects; his mother Mimori (secretly safeguarding Avrora's body); his father Gajou (a strained but caring dynamic); and his grandmother Hisano. Romantically, he forms blood-servant bonds akin to marriage with Yukina Himeragi (initially sent to observe/eliminate him, becoming his primary ally and first blood partner; they have a future daughter, Reina), Asagi Aiba (his childhood friend harboring longstanding romantic feelings; they have a future daughter, Moegi), Avrora Florestina (his predecessor, whose soul fragment resides in Nagisa; he exhibits profound loyalty, willing to relinquish his powers for her safety), Yuuma Tokoyogi (childhood friend), Sayaka Kirasaka (initially distrustful but later devoted), La Folia Rihavein (princess of Aldegyr), and Kanon Kanase (whom he treats as a sister). Allies include Motoki Yaze (childhood friend and intelligence operative) and Natsuki Minamiya (his teacher and powerful mage).
Kojou evolves from a reluctant vampire to accepting his role as a guardian. His journey involves reclaiming lost memories, refining combat skills from reckless tactics to strategic prowess, and deepening emotional bonds. By the series' end, he embraces his identity as the Fourth Primogenitor, achieves full familiar mastery, and establishes a future maintaining peace on Itogami Island while navigating complex familial and romantic ties.
Physically, Kojou possesses bluish-silver hair and blue eyes that shift red during heightened emotional states like anger or arousal. His vampire nature grants fair skin due to sunlight aversion and a well-toned physique. He typically wears Saikai Academy's uniform: a white button-up shirt, black pants, a blue undershirt, and a white hoodie.
Personality-wise, Kojou exhibits kindness, empathy, and a strong protective instinct, particularly toward his sister Nagisa due to her fragile health. This protectiveness often manifests as overbearing concern, leading others to perceive a sister complex. Generally carefree and sly, he possesses a volatile temper when provoked. Leadership qualities emerge through his indomitable will and supernatural charisma, enabling alliances with former adversaries. He remains largely oblivious to romantic advances from multiple female characters, attributed to his focus on Nagisa.
As the Fourth Primogenitor, Kojou wields enhanced vampiric abilities: superhuman strength, speed, durability, regeneration, immortality, and heightened senses. His signature powers involve summoning twelve familiars—manifestations of his vampiric energy—each corresponding to a zodiac constellation with unique capabilities. Early on, he struggles to control them due to refusing human blood, but drinking blood from specific individuals like Yukina Himeragi or Sayaka Kirasaka grants command over individual familiars. By the series' conclusion, he masters control without blood consumption as Avrora's chosen successor. Key familiars include Mesarthim-Adamas (diamond manipulation), Al-Meissa Mercury (devouring space/dimensions), Regulus Aurum (electromagnetic energy control), and Alrescha Glacies (water/sub-absolute-zero temperature control). Additional abilities encompass "Cleansing" (reality warping via physics alteration), Shikigami summoning via talismans, precognition under extreme stress, and mist transformation.
Kojou's relationships are central to his development. His familial bonds include Nagisa, whom he fiercely protects; his mother Mimori (secretly safeguarding Avrora's body); his father Gajou (a strained but caring dynamic); and his grandmother Hisano. Romantically, he forms blood-servant bonds akin to marriage with Yukina Himeragi (initially sent to observe/eliminate him, becoming his primary ally and first blood partner; they have a future daughter, Reina), Asagi Aiba (his childhood friend harboring longstanding romantic feelings; they have a future daughter, Moegi), Avrora Florestina (his predecessor, whose soul fragment resides in Nagisa; he exhibits profound loyalty, willing to relinquish his powers for her safety), Yuuma Tokoyogi (childhood friend), Sayaka Kirasaka (initially distrustful but later devoted), La Folia Rihavein (princess of Aldegyr), and Kanon Kanase (whom he treats as a sister). Allies include Motoki Yaze (childhood friend and intelligence operative) and Natsuki Minamiya (his teacher and powerful mage).
Kojou evolves from a reluctant vampire to accepting his role as a guardian. His journey involves reclaiming lost memories, refining combat skills from reckless tactics to strategic prowess, and deepening emotional bonds. By the series' end, he embraces his identity as the Fourth Primogenitor, achieves full familiar mastery, and establishes a future maintaining peace on Itogami Island while navigating complex familial and romantic ties.