Caek Sanorium

Caek Sanorium is a Fifth Progenitor among the vampires. He works directly under Saitō commands. He was tasked to guide Guren to him, and fought Guren's squad.

Appearance
According to the light novels, Caek has a beautiful wavy brown hair, alabaster cheeks. According to him, his body has been altered. Like all true vampires, Caek has red eyes, fangs, and pointed ears. He wears the clothes of a noble, and like most vampires, he wears white clothing.

Personality
Similar to most vampires, he has apathetic demeanour. Though he has polite manners, such as answering almost anything the enemy wants from him truthfully, and even complements Guren's strength. Even if treated badly he doesn't show any ill grudges. Caek never shouts in anger, and is always calm.

However, since he works under Saitō, he does what he is told from him and nothing more. He shows emotions of his own will also, such as he wouldn't hesitate to drink the blood of others like all vampires.

Events of 2015
Caek does nothing but awaits Guren arrival with his squad whom they were on a mission to restore the power in the city. Upon Guren and Shinya reach Caek, Guren sword clashed with Caek, and he greets Guren. Guren knew Caek was strong as a noble, Shinya then attacks him three times using Byakomaru. Although Caek informs the latter he already knew Shinya's location.

He then grabs Guren by the collar when Guren tried to leap back, and raising him bodily into the air, he almost chocks Guren if not for Shinya's aid using Byakomaru to distract him. Caek smirks sounding amused, despite vampire apathetic nature. Still carrying Guren with him, easily overpowering the duo. He complements Guren strength such as they are inhumane, hardly believing he is human.

Informing Guren that he is a fifth progenitor and a high ranking noble, remarking his body has been altered as well. Guren wants him to identify himself, only to receive that he is nothing but a vampire and a fifth rank progenitor. Guren warns Shinya to stay back, as his rank is high, which makes him dangerous. As he is still holding Guren by the collar, he asks him again who is he. Caek then asks Guren if he wants to know his name, identifying him as Guren Ichinose as he already knew Guren.

Guren asks the vampire's name which he finally tells him his name, Guren claims he never met him him nor heard of him, wanting to know what does he want from him. Caek gives him an answer which his master has taken a 'shine' on him, referring to him as Rígr Stafford when Guren inquires about his master. He makes him easier to understand by giving him the name Guren knew which is Saitō.

Caek is grabbed by the shoulder by Guren, questioning him if he is after Mahiru, whom Caek is knows nothing of her, however Guren doesn't believe him. Caek assures him, he isn't lying as he barely know anything of Saitō's plans, which he himself doesn't understand. Guren continue to question for him being there, before he could give an answer, Shinya arrives at his location shouting Guren's voice. Shinya, whom he had his rifle ready to shoot Caek, which wouldn't faze him and he could easily kill Shinya.

To prevent Shinya death, Guren lies to him that it's all over for him. When the power station turned on, Caek was puzzled remarking that it's strange. Later Guren friends arrived, and Guren tried to wrap their conversation with Caek. He is informed by him that there is nothing more to talk about, as his mission is done and he was ordered not to harm his friends, but mentions he might drink a little of their blood.

Now Shinya, Norito, Mito, Shigure and Sayuri faces off against him. Whom all 5 of them haven't made a dent on him, but according to Shinya he doesn't seem on killing them, however he has been holding back, since he could kill them all if he wanted to. It is revealed his mission was only to delay Guren friends while Guren finishes his conversation with Saitō.

Guren and Shinya plans on dashing away from him, However he leaves Guren friends tired as he drank so much of their blood, and it is revealed that Caek has already left. Having completed his mission.

Saitō
Caek considers Saitō to be his master, and he obeys him without question, he was sent by him to meet Guren Ichinose. According to Caek he understand very little of him, and everything he does doesn't make any sense to him. He refer to him as Rígr Stafford.

Natural Abilities
As a vampire Caek is naturally far stronger and powerful than any human. This means that he has immortality and immense strength. Being a fifth progenitor, he is one of the strongest vampires among vampires. He was able to overwhelm Guren and Shinya completely. He could've killed all of Guren friends if he was ordered to, none of them managed to wound him not even Guren or Shinya.

As a noble, he also has permission and the ability to turn someone into a vampire if he so chooses to. .

Weapon
Caek wields a first-class vampire sword, although not revealed the true strength of his sword, but when he blocked Guren's blow, a big clash sounded in the atmosphere.