Name: Hyoudou Kirei

Race: Human

Age: 17

Nicknames: Mortem Orbisque(Death Bringer in Latin), The Black Death, Angra Mainyu Reincarnation

Gender: Male

Appearance overall: Looks like Kotomine Kirei in Fate/Zero without the Golden Cross

Eye color: Dark Brown

Hairstyle & color: Short Spiky Hair that

Appearance: Has slim muscular build.

Occupation: 2nd year high school student, Bajiquan Master, Kendo Master, Former Executor

Personality: Caring, Strong, Kind, Stoic, Serious, and Protective

Likes: Mapo Tofu, Training, Family, and Friends

Dislikes: People who look down on others, People Threathening his loved ones, Bayonets

Family: Hyoudou Issei(Twin Brother), Unnamed Parents

Background & History (Other details will not be on the story): Born from the Hyoudou couples alongside his twin brother Hyoudou Issei. At a young age Kirei has been hailed as a prodigy in all aspects of education and Martial Arts that caught the eye of Irina's Father when he was ten years old. He went to Vatican with the Shidou family with the Hyoudou family's consent to become a scholar in a Prestigous School in Europe that was actually an undercover Church Executor School. From there he was considered a rare asset to the Iscariot Order of Vatican. Under the Tutelage of the Knight Paladin of the Iscariot Order, Alexander Anderson, Kirei worked diligently as an Executor-in-training from an early age, and he was once chosen as an Executor around the age of eleven after only a year after he joined. Wherein he travelled around the world hunting supernatural beings. It wasn't until Kirei gained the Mystic Eyes of Death Perception that he unconsciously activated when he was on a mission on Sumeria. It was also there Kirei discovered the ancient city of Uruk and there he Discovered the Bab-Ilu the key to the "Golden Capital" or the Gate of Babylon. For five years Kirei trained with the Iscariots for Five years until he went back to Japan to rejoin his family. One year later both him and his twin brother enrolled in Kuoh Academy

Skills and Feats: Master weapons user, Master close combat fighter, Master magician (Wards, Anti-Magic, and Time-Body Manipulation), Senjutsu, Black Keys Expert

Abilities

Mystic Eyes of Death Perception: The Mystic Eyes of Death Perception can be called a circuit that opens up in the brain and eyes to allow the user to "perceive death," the conceptual "Death of an Existence," as visual signals in the form of Lines of Death and Points of Death Their usage is not entirely dependent on the eyes of the user, as they can still "see" lines should they go blind or gouge them out. Rather than "seeing," it is more like they are "observing" everything at a higher level. "Death" is invisible to normal people, only accessed through perceiving the natural flaws with overly strong spiritual sight by looking through channels that normal people cannot perceive. This ability became the basis for his title as the Mortem Obrisque

Black Keys Mastery: Kirei's signature weapon. Kirei is extremely skilled with Black Keys, thin blades resembling a rapier that are longer than a meter with a short hilt. They boast great power and a high difficulty to master, Kirei is a rare expert at utilizing them in battle.

Gate of Babylon: Magic that connects to the "Golden Capital" allowing the user to easily access its contents. It connects the space of reality to the vault, opening an "invisible door" that allows for the contents to pass through upon the user's command. The items that pass through the gate form ripples in the empty air as they appear. He got this ability after encountering a mission in Sumer

Bajiquan: a Chinese martial art that features explosive, short-range power and is famous for its elbow strikes and more effective when utilized with magic and Senjutsu against supernatural beings

Chains of Heaven: A weapon used to divine beings binding them. Useless against beings with low divinity and non divine beings

Senjutsu: Able to control his ki very well and is very skilled in using Touki mixed with his Bajiquan fighting style

Youjutsu: Able to create illusions of himself and trick people to gather information.

Innate Time Control: the ability to separate the passage of time inside a designated space from the "flow of time" in the outside world.

Equipment:

Black Keys: Kirei's signature weapon Kirei is extremely skilled with Black Keys, thin blades resembling a rapier that are longer than a meter with a short hilt. They are used specifically by They boast great power and a high difficulty to master, so Kirei is a strong and rare expert at utilizing them in battle.

Sword of Ea: "the only sword that does not exist in this world." As quoted by Kirei, He rarely use it because of its destructive power

Chains of Heaven: A weapon used to divine beings binding them. Useless against beings with low divinity and non divine beings

Gate of Babylon's Known Weapons

Dáinsleif :is a demonic sword from the Nibelungen.

Gram :is the sword of the sun wielded by Sigurd, the greatest hero of Northern Europe in the Völsunga saga. It is a demonic sword of glory and destruction that is the model of Caliburn in the legend of King Arthur and also based on Merodach.n two myths, with both versions showing its frightening nature.

Vajra :is a weapon appearing in the Vedic mythology of ancient India. It was a weapon crafted by Tvastar, the maker of divine instruments, using the bones of the sage, Dadhichi.

Gáe Bolg:is a cursed spear with an ominous design that was obtained from Scathach in the Country of Shadows by Cú Chulainn

As you can see Hyoudou Kirei is a Combination of Kotomine Kirei, Gilgamesh and Emiya Kiritsugu. I hope this will be useful in the future as for the Harem I'm still sorting out who will be with Issei and Kirei