His Divine Weapon is a pair of gloves created through Volundr with the eleventh Valkyrie, Hlökk, which can turn anything they touch into a Divine Weapon. Hlökk herself was so averse to becoming his partner that she protested to Brunhilde, but Jack forcibly dyed her heart with terror to compel the transformation. Due to the weapon's ability, even a simple pebble touched by the gloves possesses enough power to easily demolish walls, and a mundane knife can wound the body of the god Heracles. At the start of the battle, he claimed a giant pair of shears that could be disassembled into swords was his Divine Weapon. After the shears were destroyed, he claimed his Divine Weapon was two pouches on his hips capable of producing items. He stated that nothing larger than the pouches could be produced, using an umbrella and a giant butterfly knife he assembled himself. By touching items produced from the pouches with his gloves to turn them into Divine Weapons, he tricked others into misidentifying the pouches as the source of his power. Since the arena was a recreation of 19th-century London as he requested, he set traps throughout the city and used wires for high-mobility maneuvers. Throughout the fight, he used lies and calculated behavior to hide the true nature of his Divine Weapon and its vicious capabilities. His sophisticated and cunning combat style, involving complex layers of deception, successfully toyed with Heracles and even fooled the gods. Despite his trickery, his combat skills are exceptionally high, possessing martial arts prowess acknowledged by the evil god Loki (and demonstrating literally superhuman combat ability in his past). When the 'gloves that turn everything touched into Divine Weapons' and 'Jack's extraordinary combat and assassination techniques' are combined with the 19th-century London arena, the entire city becomes a lethal weapon. One such technique involves toppling a Divine-Weaponized building onto the opponent; Jack subtly touches buildings while moving to transform them, lures Heracles into range, pins him down, cuts the building with his transformed coat to drop it on him, and uses the impact of Heracles' blow to crash through a window and escape the falling structure. Watching this, Conan Doyle and William Shakespeare were struck with horror, realizing every move was a calculated 'diabolical plot.' His finishing move involves coating his gloves in blood to turn the blood itself into a Divine Weapon, then piercing the opponent's body with a knife-hand strike. This move inflicted a fatal wound on Heracles, deciding the fourth round. Jack adjusted his fall after taking an aerial hit so that an iron fence would impale his side; by clutching the wound, he naturally and unsuspiciously coated his gloves in a large amount of blood. He then broke off a piece of the fence to use as a concealed rapier, making Heracles and the audience believe this desperate improvised weapon was his final trump card, successfully hiding his blood-coated gloves until the very end. Upon hearing Loki's analysis of this sequence, Hermes remarked that it was easier said than done and that he would never attempt such a dangerous gamble, while Loki praised Jack as a formidable opponent for risking his life to take down Heracles.

An existence akin to an evil spirit. A collective of vengeful ghosts wandering the darkness of London, they searched for women who could be their mother, leading the public to attribute their deeds to 'Jack the Ripper.' Eventually, mages of the Clock Tower realized the cause was magical in nature and handled the matter in secret. It is said that even Sherlock Holmes attempted to solve the case but withdrew upon realizing it involved magecraft. They are merely one of the many possibilities of the unidentified Jack the Ripper. Since the identity of Jack the Ripper recorded in the Throne of Heroes has countless possibilities, his form is never fixed as long as the legend is believed; he takes various shapes depending on the location, era, Master, and Class of summoning. Seeking a unique place of peace, she continues to wish for it from the Holy Grail. First person: We (plural, as her identity is a collective). On the surface, she is a pure and innocent young girl, a child in every sense. Killing is merely her sustenance, her means, and her regressive impulse, not a hobby. Lacking life experience, her knowledge is entirely provided by the Holy Grail, making her naive compared to other Servants, yet her mind works with terrifying speed due to being summoned as Jack the Ripper. Being friendly and lacking mental autonomy due to her lack of experience, she is highly susceptible to her Master's personality; if the Master is good, she can exercise self-control despite her Chaotic Evil alignment. She responds cruelly to malice but is vulnerable to kindness. As a true demonic entity rather than a human, her physical abilities are extremely high, transcending human limits, and she strengthens herself by consuming the spiritual cores of other Servants. She is well aware that her youthful appearance causes opponents to let down their guard or hesitate, and she instinctively demonstrates assassination techniques of a very high level. Being a collective of spirits, she can separate the ghosts that compose her and possess children to control them. The possessed humans' arms turn black, and they attack with scalpels infused with magical energy.