OVA
Description
Kojō Akatsuki is the protagonist of the anime and light novel series Strike the Blood. He was an ordinary high school student living on the artificial island of Itogami Island, a demon sanctuary, until his life was changed by inheriting the powers of the Fourth Progenitor, the strongest vampire in existence, from the previous holder Avrora Florestina. Despite this immense and destructive power, Kojō maintains a kind, empathetic, and often carefree personality. He is highly loyal to his friends and possesses a strong moral compass, usually fighting to protect those close to him rather than for personal gain or domination over others. He is a reluctant hero who struggles to balance his ordinary school life with his duties as a vampire, constantly working to contain his bloodthirsty urges in order to preserve his humanity.
Kojō is driven by a deep desire to protect his loved ones and the peace of Itogami Island. The author of the series has described the core dynamic as Kojō and his allies overthrowing enemies constrained by outdated authority and grudges, highlighting his youth-driven motivations. Throughout the narrative, he is the central figure of conflict, targeted by various factions seeking to control, destroy, or exploit the power of the Fourth Progenitor. He evolves from an insecure inheritor of immense power into the de facto ruler and protector of the island's Night Empire, a role he fully embraces after defeating the scheming vampire Dimitrie Vatler.
His relationship with the sword shaman Yukina Himeragi is pivotal. She is sent by the Lion King Organization to observe him, armed with instructions to kill him if he becomes a threat, but over time they develop a deep partnership and mutual trust. His bond with his sister Nagisa, his childhood friend and classmate Asagi Aiba, and his best friend Motoki Yaze grounds his character in relatable, human connections. Over the course of the series, Kojō demonstrates significant character growth. Initially unable to fully control the twelve Beast Vassals he inherited, he gradually masters them all through intense battles and personal reflection. His initial reluctance gives way to a strong sense of responsibility, transforming him into a confident leader who vows to protect his territory and those under his care.
As the Fourth Progenitor, Kojō possesses standard enhanced vampiric traits including superhuman strength, speed, durability, regenerative healing, and virtual immortality. His most defining ability is the command of twelve powerful familiars known as Beast Vassals, each representing a different form of disaster or elemental force that he can summon in combat. Additionally, he can create Blood Vassals by sharing his blood with allies, granting them enhanced abilities and a powerful connection to his own vast reservoir of magical energy.
Kojō is driven by a deep desire to protect his loved ones and the peace of Itogami Island. The author of the series has described the core dynamic as Kojō and his allies overthrowing enemies constrained by outdated authority and grudges, highlighting his youth-driven motivations. Throughout the narrative, he is the central figure of conflict, targeted by various factions seeking to control, destroy, or exploit the power of the Fourth Progenitor. He evolves from an insecure inheritor of immense power into the de facto ruler and protector of the island's Night Empire, a role he fully embraces after defeating the scheming vampire Dimitrie Vatler.
His relationship with the sword shaman Yukina Himeragi is pivotal. She is sent by the Lion King Organization to observe him, armed with instructions to kill him if he becomes a threat, but over time they develop a deep partnership and mutual trust. His bond with his sister Nagisa, his childhood friend and classmate Asagi Aiba, and his best friend Motoki Yaze grounds his character in relatable, human connections. Over the course of the series, Kojō demonstrates significant character growth. Initially unable to fully control the twelve Beast Vassals he inherited, he gradually masters them all through intense battles and personal reflection. His initial reluctance gives way to a strong sense of responsibility, transforming him into a confident leader who vows to protect his territory and those under his care.
As the Fourth Progenitor, Kojō possesses standard enhanced vampiric traits including superhuman strength, speed, durability, regenerative healing, and virtual immortality. His most defining ability is the command of twelve powerful familiars known as Beast Vassals, each representing a different form of disaster or elemental force that he can summon in combat. Additionally, he can create Blood Vassals by sharing his blood with allies, granting them enhanced abilities and a powerful connection to his own vast reservoir of magical energy.