A girl who is always seated in a wheelchair. She is characterized by waist-length gray hair, devil-like horns with monitors attached to her head, and pupils shaped like '0' and '1'. As a mathematician, she prefers rational thinking and dislikes uncertain things like fortune-telling or prophecies. Her speech is monotone and gives a cold-blooded impression, but she has a cute side, such as holding a grudge for three days if her calculations are mocked as mere 'predictions.' Her talents are "Predictive Calculation" and "Master of the Cyber World." Her past life was John von Neumann, the mathematician known as the father of the modern computer.

A figure with a red apple for a head, wearing a white lab coat, white gloves, black pants, and black shoes. At first glance, he looks like a modern scientist with a so-called 'object head.' He generally behaves brightly and socially toward everyone. He is mentally stable, acting as a mediator to calm things down when discord arises among allies. His talent is "Fruit of Gravity." His past life was Isaac Newton, the English physicist and mathematician who proposed universal gravitation.

A character with short bangs that don't reach the eyebrows and long hair down to the back. She wears a green pantsuit but no shirt underneath, revealing a red gear-shaped birthmark on her chest. She is flat-chested. Her talent is "Spatial Transposition." Her past life was Albert Einstein, the German physicist who published the "Theory of Relativity."

A reticent young man with a shaved head, dressed in the uniform of the former Imperial Japanese Army. His talent is "Undying Soldier." His past life was Hiroshi Funasaka, an infantryman of the Imperial Japanese Army. He has a serious personality and often ends his sentences with formal, military-style inflections. First person: I (polite/formal).

A beautiful woman whose long bangs hide her eyes. She uses her talent in a suggestive manner and wears a very revealing outfit consisting of bandages wrapped around her body under a nurse's uniform. Neumann calls her a "lust-crazed nurse," though she doesn't seem to mind. She speaks in a somewhat relaxed, drawn-out manner. Her talent is "Angel of Healing." Her past life was Florence Nightingale, the world-famous mother of modern nursing education. Gender: Female.

A beautiful girl with gray hair in a side-tail and gray eyes, possessing a look that stands out from typical Japanese features. She usually hides her distinctive hair and eyes with a hooded sweatshirt (when she undergoes Reincarnation Return, she changes from her gray-haired, gray-eyed form to a black-haired, black-eyed appearance typical of a Japanese person). She is an incredibly bright and friendly person. Her tone is elusive, and she is fundamentally bellicose, even depicted as finding pleasure in combat. Her talent is "Distorted Two-Heaven Ritual." Her past life was the great swordsman Miyamoto Musashi. Gender: Female.

A small Returner wearing white clothes stained with numerous paint marks, standing about the height of a child. For unknown reasons, he always wears a mask with a creepy face drawn on it. His personality differs greatly between the past and modern arcs. In the past, he often went without his mask and was as bright as a child, innocently describing the bickering between Neumann and Xiang Yu as "getting along!" and painting all over Xiang Yu's base. First person: I (childlike). In the modern timeline, he mostly stays masked and is extremely taciturn. While he still spends his time painting, the bright impression is completely gone. His talent is "Era." His past life was the world-famous painter Pablo Picasso. Gender: Male.

He craves talent—anything, just one will do. He would sacrifice anything to get it. He possesses an abnormal obsession with the concept of "talent." A high school freshman who believes he has no redeeming qualities and views himself as a weak, four-eyed loser, but in reality, he is a hard worker who is capable and versatile. His talents are "Thief's Right Arm" and "Thief's Left Arm: Stolen Goods Execution." His past life was Ishikawa Goemon, Japan's most famous chivalrous thief. Gender: Male.

A member of the expedition team. She is a female swordsman in Japanese attire with long crimson hair tied in a ponytail. She wears an eyepatch over her left eye as in historical accounts (though she actually has a left eye underneath and is not truly one-eyed). She is serious, sincere, and the very model of a warrior. Her talent is "Extreme of One Inch." Her past life was Jubei Yagyu, the Edo-period master swordsman said to be unrivaled in swordsmanship. Gender: Female.

A member of the expedition team. She is a sniper covered in a snow-white hood, equipped with a rifle as long as she is tall. Her face is hidden by the deep hood, but underneath is a woman with a mask covering her mouth. Her pupils look like gun crosshairs (her true face is revealed to be a girl with long blonde hair and burn-like scars from her neck to the left side of her face). She is a calm, collected, and taciturn lone sniper. While she usually performs her job as a professional, she has a battle-crazed side, intentionally missing vitals to bait a frontal shootout or showing unprecedented excitement when encountering a strong foe. Her talent is "White Hell." Her past life was Simo Häyhä, the legendary sniper feared as the White Death. Gender: Female.