S1E12The Amphisbaena IV
Strike the BloodStrike the Blood
Kojou Akatsuki's days as an ordinary high school student in the Demon District of Itogami Island come to an abrupt end after a fateful encounter leaves him with the remarkable abilities of a vampire. It isn't long before he is thrust into the center of attention when it is discovered that he is the fourth primogenitor, an immensely powerful vampire whom most consider to be merely a legend. Fearing Kojou's destructive potential, the Lion King Organization sends in an apprentice sword-shaman, Yukina Himeragi, to monitor, and should he become a threat, kill the boy deemed the world's most powerful vampire. Forced together by circumstance, the two form an unlikely alliance as Kojou comes to terms with his abilities and they both struggle to protect the city from various emerging chaotic forces.
Episode Summary
When Kojou is disabled in the battle with Kanon, Yukina retreats with him behind La Folia's barrier. Both Yukina and La Folia share their blood with Kojou to aid in his recovery and the awakening of a new power. They have no choice but to rush to Kanon's rescue as her ego slips beyond control and she loses her grip on her humanity.