Kojou was a normal high school student 3 months ago, until the original 4th primogenitor had released her spirit into him because of a wish she had granted him. It's possible they made a deal.

Sometimes, his vampire urges try to take over and his eyes are about to turn red. He usually gets a nosebleed and coughs. Yukina claims that it is impossible for a human being to randomly become the 4th primogenitor, but he can't remember any details of the incident.

As a vampire, he possesses superhuman strength, speed, reflexes, and durability, but is much more powerful than normal vampires due to his status. He has also inherited Avrora's twelve familiars.

(Source: Wikipedia)

The Fourth Primogenitor—That's the world's strongest vampire that should only exist in legends. Accompanied by twelve Kenjuu and spreading calamity, this phantom vampire appeared in Japan. For the observation and obliteration of this Fourth Primogenitor, the government and Lion King decided to dispatch an attack mage known as a Sword Shaman. However, for some reason, the one chosen for the observation was a apprentice Sword Shaman girl, Himegari Yukina. Wielding the strongest anti-primogenitor spirit spear, Yukina arrived at Demon District, Itogami City. What is the true identity of the Fourth Primogenitor, Akatsuki Kojou, she encountered over there!? 
(Source: Baka-Tsuki, edited)

__Skills & Abilities:__ shooting a firearm

[Website](http://yoshimasa-hosoya.info/) | [Twitter](https://twitter.com/hosoya_info) | [Instagram](https://www.instagram.com/yoshimasa.hosoya/) | [Staff Instagram](https://www.instagram.com/yoshimasa_hosoya_staff/) | [YouTube](https://www.youtube.com/channel/UC6cry8C4nNpobQdf8be7cdw) | [YT Twitter](https://twitter.com/bokudake369) | [Weibo](https://weibo.com/u/7599287210)


A Japanese voice actor, singer and narrator. He graduated from Tokyo Announce Gakuin Performing Arts College, then joined Mausu Promotion Actor Training Center in 2002, and signed on with Mausu Promotion in 2006. He is currently a freelancer.

__Awards:__
- 8th Seiyuu Awards - Best Supporting Voice Actor for his role as [Yuusuke Asahina](https://anilist.co/character/47223/)
- 10th Seiyuu Awards - Best Supporting Voice Actor for his roles as [Orga Itsuka](https://anilist.co/character/89235/) and [Ginti](https://anilist.co/character/88683/)

__Non-Anime Roles:__
- Welt in "Honkai Star Rail" (VG)
- Gaius Worzel in "The Legend of Heroes" series (VG)
- Basilio Lupus Magnus in "Metaphor: ReFantazio" (VG)

Son of the actor and voice actor [Michael Grimm](https://anilist.co/staff/166053/Michael-Grimm).

[Instagram](http://www.instagram.com/alegraue) | [Twitter](http://www.twitter.com/alegraue)

Alejandro Graue is an Argentine voice actor best known for being the voice of Dipper Pines in _Gravity Falls_.

Kojou and Yukina are on their way to school as usual when they find La Folia being chased by someone. Yukina crosses blades with the enormous man who's pursuing her, but before the fight can escalate further, La Folia makes a shocking comment: "Father, this is the Fourth Progenitor, Akatsuki Kojou... my first!" La Folia's father, Lucas, had told her to decide who she wished to marry, so she declares that Kojou is her choice. Lucas refuses to accept this, but then La Folia's mother, Polifonia, invites Kojou and Yukina to a party so they can all talk in more detail. When they arrive at the party, they discover that Asagi, Yaze, Nagisa, and Sayaka have been invited as well, due to their connections with Kojou. What sort of heated battle is about to break out between the many girls in Kojou's life?! 
 
(Source: Crunchyroll)

The second season of Strike the Blood. The adaptation of 9th, 11th and 12th LN volumes.

He never asked for this power.
 
Kojou Akatsuki used to be an ordinary high school boy--but that was before he became the Fourth Primogenitor, the most powerful vampire of all time. Worse--he doesn't even remember how it happened. Middle schooler Yukina Himeragi, meanwhile, is the Attack Mage sent to observe him--and to stop him if he gets out of control. But was it really a good idea to send a cute girl to observe a massively powerful vampire boy whose abilities activate whenever he gets aroused? And on an artificial island populated with all manner of demonic individuals, each with their own designs on the Fourth Primogenitor--?!
 
(Source: Yen Press)

The third season of Strike the Blood. 
 
It was announced at a Dengeki Game Festival stage event that the Strike the Blood light novel series will get a third OVA release. It will cover until the end of Seisen-hen. 
 
(Source: MAL news)

The fourth season of Strike the Blood.

While several of the girls investigate Vatlers ship afloat, Akatsuki and Himeragi wake up alone in the school gym with no memories of the day before and no explanation for why they were asleep on the same futon and why Himeragi is wearing an old-fashioned school PE uniform with bloomers. A bloody baseball bat and missing weapon soon deepen the mystery as assorted forces race to solve the mystery of the empty boat, the bloody bat, and the purple bra in the MCs pockets!

The fifth season of Strike the Blood.