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The Holy Sword Project was a secret project conducted inside the Christian Catholic Church that aimed to create swordsmen who can wield the Holy Sword Excalibur.

Prelude[]

The Excalibur is one of the two Holy Swords wielded by The Legendary King, King Arthur Pendragon of Camelot, along with Caliburn. It is a holy weapon that was created through means of magic and alchemy by those who reached the territory of God. At some point, during the Great War, the original Excalibur was broken, and the pieces were converted into seven different swords with the name "Excalibur." The Catholic Church, Protestant Church of England, and the Eastern Orthodox Church were each in possession of two swords, with one going missing over the years after its creation.

Valper Galilei had a huge love for Holy Swords and was fascinated by the legend of Excalibur since childhood. Upon finding out that he could not use Excalibur, he fell into despair and held admiration for those that could wield Excalibur. That feeling became so powerful that he started to conduct an experiment to create those who could use them.

History[]

Kiba amongst the subjects of Project Holy Sword

Project's test subjects

The project that the Catholic Church planned secretly, organized by Valper, was to artificially produce Holy Sword wielders, and took place in a certain institute in Italy. Valper and his colleagues gathered young individuals with talents, mostly from orphanages. There were boys and girls who were talented at using swords, as well as Sacred Gear possessors.

Day after day, the children gathered would be subjected to inhumane experiments. As the children continued to be experimented on, the scientists tried to find the component that allowed humans to wield Holy Swords, as the children chose to believe that they would be able to become "special beings" and use holy swords. However, after continuous experimentation, the project was ruled a failure due to not being able to produce holy sword wielders, as the subjects were ordered to be disposed of.

The test subjects were gathered at a location and the researchers who wore protective clothing started gassing the children. This was done in order to hide their experiments from their superiors.

Young Yuuto

Isaiah's escape

Somehow, in the middle of the mass gassing, a boy named Isaiah was given a chance to escape by his comrades who pushed away one of the researchers. After they opened the door by force, Isaiah's comrades shouted at Isaiah, who was in the least critical state out of all of them, to leave while he had the chance. He managed to escape from the laboratory and the pursuing researchers, but the poisonous gas had already infected him. Apart from certain people, the test subjects who had lower abilities than average were all disposed of because they weren’t needed.

But what Isaiah didn't know, was that he wasn't the only one who survived. While many of his comrades lost their lives in that gassing, a girl named Tosca with a strong barrier type Sacred Gear survived. It was discovered after the experiment, and Valper was unable to do anything. Although the user was in a state of suspended animation, it wasn’t possible for her to be released, and the researchers had no choice but to place her into a deep hidden chamber within the facility. Because she was held in a state of suspended animation whilst inside the barrier, her body’s growth stopped.

Light Attribute1

Light Container made from the killed children

It is later revealed that the Holy Sword Project was a success. However, there was a requirement to wield the Holy Swords: the candidate must have a mass property of a light attribute in their body. Therefore, Valper removed the light property from candidates to transfer the necessary element to someone that had the capacity of wielding a Holy Sword. However, this transfer resulted in the deaths of the donors. With this information, the Seraphim were able to devise a method of transferring the light element to for the Light Container without killing the person that it is removed from.

Conclusion[]

Yuuto Spirits

Yuuto with his late comrades

Due to his actions, Valper was excommunicated from the Church and labelled as the "Genocide Archbishop". Seeking revenge from the Church, he allied himself with the Fallen Angels. Tosca herself was found during a search of the facility, but the Church also was unable to release the barrier. However, after the formation of the alliance, they were finally able to release the barrier by using the Fallen Angels’ advanced technology.

Isaiah, who managed to escape, met Rias Gremory who had come to observe Italy as he was dying. She later reincarnated him as her Devil servant, and gave him a new name - Yuuto Kiba. His time at the facility and the death of his comrades caused Yuuto to grow a deep hatred towards the Excaliburs and anyone related to them. It wasn't until Kokabiel's attack on Kuoh Town, that he was able to get revenge on Excalibur by defeating Freed Sellzen who was wielding the Fused Excalibur.

After gathering the seven Excalibur swords, the Church wanted to create a replica which contained the same power of the original Excalibur. However, the replica’s actual power was less than a fifth of the original.

Upon learning that Ewald Cristaldi is the former wielder of Excalibur and that he is also the only person that the Pope gave the replica of Excalibur during the production of Ex-Durandal, the news reignited Yuuto's passion to surpass Excalibur again and the wielder of Excalibur, but not for revenge, but as a challenge. By the end of Volume 19, Yuuto succeeded in defeating both Cristaldi and his Excalibur replica.

Most importantly, by the end of Volume 19, upon learning of Tosca's survival, Yuuto somehow managed to find his purpose to carry on, which he had been looking for during his time as Rias' servant - not only to keep moving on for his late comrades, but to reunite with Tosca.

Participants[]

Scientists[]

Name Information Race Status

Valper Galilei

HS DxD New -Valper img
A former Vatican researcher who was the lead scientist in charge of the Holy Sword Project. After the higher-ups discovered the atrocities that he committed in his experiments, they exiled him as a heretic. He later joined the Grigori, hoping to get revenge on the Vatican and Heaven for their role in banishing him. Human Deceased

Test Subjects[]

Name Information Race Status

Isaiah

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An orphan who was taken to be experimented on as a subject for the Holy Sword Project. After the project was deemed a failure, the subjects were ordered to be disposed of but Isaiah's comrades stalled the guards long enough for him to escape after they were gassed by the guards. As he lay dying he was found by Rias Gremory, who reincarnated him as her Knight servant Devil, renaming him into Yuuto Kiba. He is the possessor of the Sacred Gear: Sword Birth. Reincaranted Devil (Former Human) Alive

Tosca

Tosca (Close-Up)
A girl was formerly a part of the Sigurd Institution, but was sent to the Holy Sword Project due to not meeting the requirements to become a warrior. She was experimented on, which caused her to be trapped in her Sacred Gear's barrier ability and forced into a coma, until the scientists of the Vatican were able to release her with the help of Grigori's technology. She possesses an unknown barrier Sacred Gear. Human Alive

Navigation[]

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