Kischur Zelretch Schweinorg

Kischur Zelretch Schweinorg (キシュア・ゼルレッチ・シュバインオーグ) is one of five living magicians capable of true magic beyond modern science or magecraft. He has numerous nicknames, including Zelretch the Wizard Marshall (魔道元帥ゼルレッチ), Zelretch of the Jewels (宝石のゼルレッチ), Old Man of the Jewles (宝石翁), and Kaleidoscope (万華鏡（カレイドスコープ）)." He has control over the Second Magic, "Kaleidoscope", which allows for the "Operation of Parallel Worlds." He is one of the few characters to appears in more than one of the stories of the Nasuverse, appearing in Shingetsutan Tsukihime manga and Prologue in the Plus Period artbook, and the Heaven's Feel scenario of Fate/stay night.

Profile
Zelretch was responsible for the defeat of Brunestud of the Crimson Moon, the King of Vampires, in a fight many centuries ago simply because of his dislike for Brunestud. During the battle, Zelretch had his blood sucked, resulting in the Wizard Marshall being turned into a vampire classified as one of The Twenty Seven Dead Apostle Ancestors. He helped oversee the formation of the Fuyuki Holy Grail War system two hundred years ago with Makiri Zouken, Tohsaka Nagato, one of his apprentices, and Justica von Einzbern. Nagato allowed his property, Fuyuki City, to be used as the battleground, Zouken proposed the system of "Masters" and "Servants", and Justica developed the Heaven's Feel system, offered the homunculi vessels for the Grail, and became the core of the Great Grail. He is known as a complicated and weird individual with a personality where he becomes pissed of with those who are evil and laughs at do-gooders. He has a demeanor that can be called "old, but not old."

Despite his status as a vampire, Zeltretch still remains a ally of humanity and the nearly extinct race of True Ancestors. He is surprisingly meddlesome in worldly affairs, and he is known to be a troublesome figure who frequently sparks conflicts. He acts as a surrogate grandfather to Arcueid Brunestud, and is both admired and disliked by the Mage's Association. He is known to simply take pupils on a whim, but as his tutelage, while comprehensive, frequently traumatizes or cripples the most promising of students, there has yet to be a successor from any of his the family lines that follow his teachings. When appearing in the Association, the department heads worry over having to send their most promising students in order to force him to leave, but at the same time worry that they will be unwilling or incapable of continuing their careers. Despite being known as a goof-up and his least promising disciple, Nagato was one rare talented magi that returned without a scratch. Zelretch appears before Tohsaka Rin at the Clock Tower after she manages to recreate his Jeweled Sword with help from Shirou during Heaven's Feel, complimenting her accomplishment by taking her as a pupil and having the charges against her nullified. He had expected the least out of Nagato's unremarkable bloodline, reflecting on the progression of the Tohsaka family in just six generations.

Abilities
Zeltrch has complete mastery of the Second Magic, which allowed him to defeat Crimson Moon in one on one combat due to Crimson Moon having no knowledge of Magic, and allowed him to stop the "Moon Fall", during which the moon was falling towards earth, with pure force. The encounter caused a heavy toll to be taken on his body, known for its strong and tough physique, which aged him considerably and diminished his powers to the point where he can no longer use that level of magic extensively. After being bitten and becoming a Dead Apostle, he has gained limited immortality and he is recognized as one of the strongest Dead Apostle Ancestors. He mainly uses what is left of his abilities to travel between parallel worlds. Along with being a Magic user, he is also at the pinnacle of magi, earning his title as a Wizard Marshall. He has a number of inventions that utilize Second Magic, one of which is the his Mystic Code, the Jewel Sword Kischur Zelretch Schweinorg, more commonly referred to as Jeweled Sword of Zelretch (宝石剣ゼルレッチ), the Jewel Sword (宝石剣), and Zelretch, only able to be used by him and those of his lineage. It is the tool with which he pushed back the moon, and he left blueprints of the sword to the Tohsaka family as a sort of long-term homework that he expects will take many generations.

The sword is capable of the Multi-Dimensional Refraction Phenomenon, allowing the user to draw in potentially infinite prana. The kaleidoscope-like jewel blade creates a small opening to the same area in another parallel world, though any further interference is impossible, and it draws in all of the prana from that space. Prana channeled into the blade can be fired off in a blinding stream of light. The capacity of the blade is limited, so the attack power will always be the same no matter how much prana is drawn. Also, as a jewel, the sword can also be detonated as a one-shot explosive. The sword is created during Heaven's Feel by using the blueprints, Emiya Shirou's Projection, and Illyasviel von Einzbern's inherited memories from Justica of Zelretch's original sword. The sword is inferior to the original, and using it causes Rin's muscles to be damaged. Due to this, Tohsaka Rin is better able to grasp the the blueprint and theory, generations ahead of when Zelretch expected, though it will take decades and numerous resources to reproduce it

He is also the creator of the Kaleidostick, a sentient wand that hates its creator. The Kaleidostick, Ruby, is capable of forming a contract with its wielder, allowing it to use an ability known as Prism Trance to "download" and transfer knowledge from an alternate version of its user into its current wielder. It also provides an ample amount of prana, but it also likes to manipulates its wielder into humiliating situations. In Fate/hollow ataraxia, the Kaleidostick is responsible for transforming Rin into the magical girl Kaleido-Ruby, and a sister wand, Sapphire, is introduced in Fate/kaleid liner PRISMA☆ILLYA. Rin uses Zelretch's Treasure Chest, an heirloom of the Tohsaka House, in hollow ataraxia, which looks a “genuine treasure chest” on the outside. It is actually a "magical chest" that spacial distortion inside of it made by applying the Second Magic. The dimensions fluctuate and bend according to the contents, allowing most items to fit into it, and one hour inside is equivalent to one day outside. She keeps the Kaleidostick and the Jewel Sword's blueprints in it. Also, while trapped in the chest, Shirou and Rin managed to call three years into a parallel world's future using a cellphone, having a confused conversation with that future's Luviagelita and Rin. Neco-Arc is suggested by Aozaki Aoko to have been brought from another world by Zelretch in Melty Blood Act Cadenza.