The cause of the catastrophe eight years ago was magic that was considered taboo. It was originally studied by the Hyakuya Sect before the collapse of the world, but was secretly inherited and continued to be studied. Nowadays, its use as a weapon is close to taking shape.

The orphans holding the "Seraph of the End" factor were all killed by vampires. Only Yuichiro and Michael survived under the protection of Krulru. She knew something about the Seraph of the End. Due to the Hyakuya Sect's research on the "Seraph of the End", an unknown virus broke out that killed humans over the age of 14, just like the end of the world predicted in the "Apocalypse" in the Bible.

However, adults who received ghost curse experiments and gained ghost curse abilities gained virus resistance and survived, such as the Japanese Imperial Ghost Army. In order to subvert the world ruled by vampires, Japan's largest magic organization.

The headquarters is located in Shibuya, Tokyo. It is a human group centered on the famous Hiiragi family and based on the magic organization "Emperor's Oni". Committed to the revival of humanity after the destruction of the world.

The military ranks, in order of size, are: marshal, general, lieutenant general, major general, colonel, lieutenant colonel, major, captain, lieutenant, second lieutenant, special agent second lieutenant, Cao commander, sergeant, special first-class soldier, Special Private, etc.

The Hiiragi Family

The famous family of magicians who rule the Imperial Ghost Army of Japan.

With a origin and history of more than 1,200 years, he is a famous master who serves as the center of Japanese magic organization. Before the world's destruction, the apex of the King's Religious Organization "Emperor's Ghost" fully exerted its authority.

In order to demonstrate the power and prestige of the Hiiragi family, people with the name "Hiiragi" are given absolute rights and identities. Including:

1. Serving as the center of the nationwide magic organization and the Japanese Imperial Ghost Army

2. Being allowed to enter all military facilities

Famous families

The ten sects of curses that exist as subordinates and branch families of the Hiiragi family are: Ichinose, Second Doctor, Third Palace, Four Gods, Five Scholars, Six Paths, Seven Seas, Bagua, Nine Ghosts, and Jujo.

The Moon Oni Group

The elite front-line combat unit of the Japanese Imperial Oni Army, formerly known as the Imperial Moon, a spell organization directly under the Ichinose family.

A group led by Ichinose Guren, equipped with special weapons to fight vampires.

The strategy is to form a team of 5 people equipped with weapons to fight vampires. The captain is responsible for commanding. After weighing the strength of the vampire opponent, the team fights or retreats.

Emperor's Ghost

The predecessor of the Japanese Imperial Ghost Army. Before the world collapsed, it was Japan's second largest magic organization after the Hyakuya Sect.

Same as the Imperial Ghost Army, it is completely controlled by the Hiiragi family. Manages and operates Dai-ichi Shibuya High School, a training school for its cadre candidates.

At that time, among the powerful members of the Hiiragi family, Hiiragi Mahiru and Hiiragi Hiroyuki were competing to become the next head of the family. However, Mahiru's mysterious disappearance makes Kureto the de facto next leader. A race that covets human blood and rules the world after the collapse.

Having physical abilities beyond those of humans and feeding on human blood, vampires will keep humans in captivity as "livestock."

Its existence, purpose, and significance to the world are currently unknown.

High-ranking Ancestor

A high-class aristocratic vampire with a rank of 6 or more.

Has absolute power and the ability to rule vampires in various countries.

There is a video conference called the "Higher Ancestor Meeting" among the upper ancestors.

Nobles

Have the "right to turn humans into vampires", vampires inherited from the blood of their ancestors.

Possessing combat abilities that ordinary vampires cannot match.

Urban Defense Force

A force composed of vampires with high combat effectiveness.

On the one hand, in order to protect the vampire city, he fights on the front line of the battlefield.

On the other hand, he is very good at sacrificing the humans he hunts to the nobles in various cities. The source of magical power. Its form is actually the tragic end of a vampire who goes berserk due to extreme lack of blood.

The ghosts that place ghost curses on equipment are all former vampires who have lost their bodies.

There are types of ghosts, such as Mingwang, Bodhisattva, and Black Ghost. Different types have different strength.

Hate human love and friendship, ghosts like the dark desire of hatred. Spell masters have long used the power of ghosts to perform spells.

The sequence of ghosts is not determined by strength, but by the difficulty of use and the probability of appearance. Especially for ghosts above children, there is no obvious difference in the strength of weapons.

The Vampire Annihilation Force uses weapons above Mingwang, and the Oni below are used for mass-produced Oni curse equipment (such as bow weapons) for use by ordinary soldiers. Alien monsters that began to appear when the world collapsed. It has multiple legs, the tips of which are shaped like blades.

And, for some reason, it has the habit of only attacking humans.

Vampires took advantage of this habit and used the Four Horsemen of John to capture humans. A spell that is activated by chanting a spell using a charm.

Using the power of "ghosts", humans can also activate special abilities.

The magic techniques, known for their complexity and magnificence, were once regarded as the main force.

However, after the development of the weapon that changed the world, the cursed equipment, it is almost no longer used today.

At that time, Hyakuya Sect and Tei no Oni were the two major curse organizations in Japan, and their curses were different. It is an equipment formed by using magic spells and ghost spells to bind and seal ghosts and gods in weapons. The only countermeasure that can kill a vampire. This weapon can only be used after making a contract with a sealed ghost. There are various forms, and the holder can obtain more than 7 times the physical ability of humans. However, it must be noted that if the user does not have strong spiritual power, he may become a ghost himself.

Hiiragi Mahiru successfully developed the spells of the Hiiragi family and the Hyakuya Sect, but he was devoured by ghosts during the research and fell.

According to the nature of the ghost who signed the contract, there are two special ways to use the ghost curse equipment:

Realization

That is, materialization.

To make ghosts appear and exert special abilities such as sensing enemies.

Because the concentration of ghost curses in the body will decrease after use, and oneself will become weaker.

However, it is advantageous in long or medium-distance battles, so it can easily be sent to rear support tasks in the army.

Possession

That is, possession.

A state in which one possesses oneself and greatly improves physical abilities.

Coupled with the ability to fight vampires without losing, they play the role of directly fighting vampires and protecting the companions behind them. The special weapons used by vampires are divided into first-level weapons and second-level weapons.

The first-level weapons are mostly owned by nobles and powerful people in the urban defense force, while the second-level weapons are held by ordinary vampires.

The holder activates the blood-sucking structure on the weapon handle by saying "blood-sucking".

The blade of a weapon that has sucked blood will be dyed red, and the holder's physical ability will also increase significantly.

Weapons are usually in the shape of Japanese swords, Western swords and halberds. An act that is only allowed for vampire nobles to make humans drink their blood and make them become their dependents.

The stronger the master's power, the stronger the "vampire" dependents will be.

After becoming a vampire, as long as you suck human blood, you will completely become a vampire and your body will stop growing.

However, vampires do not easily increase the number of their kind, so there are very few reports of vampires. Humans who hold the power of ghost curses are completely controlled by ghosts.

Since the ghost's wish is to seize the host's body, when the host's mental state is severely weakened or the power of the ghost curse is excessively used, humans may degenerate into the form of a two-horned ghost.

Ghost-turned humans are monsters who like to kill, and their physical recovery ability and combat effectiveness are extremely high. Before the world collapsed, Japan's largest magic organization.

The spells from all over the world were fused and used by him, and he started a war with the Emperor's Ghost. At the same time, he runs an orphanage and uses orphans to conduct inhumane human experiments, which is notorious.

But when the world collapsed, they were annihilated by vampires, and only the orphans were left with "Hakuya" as their surname. The headquarters of the Japanese Imperial Ghost Army is located and the largest human city in Japan.

In order to prevent the attacks of John's Four Horsemen and vampires, it was surrounded by thick walls.

Furthermore, this city wall is a special barrier, and the abilities of the Four Knights of John will be reduced after entering the city wall.

The Second Shibuya High School where Yuichiro Hyakuya studied was built here, and the members of the Japanese Imperial Ghost Army also lived a short and peaceful life here. Under the rule of the Japanese Imperial Ghost Army, it is the second capital of mankind.

Surrounded by huge walls to prevent foreign invasion.

It was previously dominated by vampires, but Guren led his troops to successfully recapture it. Since then, it has been human territory.

But after Team Shinoa was formed, Shinjuku was attacked by vampires.

With the help of the Hiiragi family, Team Shinoa and Team Guren won the defensive battle, but there were also many victims.