Name: Kohaku Race: Human Birthday: August 8th 5723 Age: 16 Gender: Female Height: 160cm Weight: 52kg Hair Color: Blonde Eye Color: Teal Blood Type: B Nationality: Japanese

Family: Kokuyo (Father), Ruri (Older sister), ISS Astronauts (Ancestors) Occupation:Power Team Affiliation: Ishigami Village Kingdom of Science Birthplace: Ishigami Village Favorite Food: Meat dishes Favorite Type: Someone who puts in unwavering effort, step by step Treasure:A barrette from Ruri Motif Color: Magenta

Appearance: Kohaku is a compassionate and devoted young woman whose defining trait is her readiness to protect those she loves at any cost. She takes rigorous care of her sickly sister and even enters a marriage tournament solely to shield her. Her protectiveness often extends beyond family, as seen in her role as an older-sister figure to Suika and in the comfort she offers to others in distress, such as Mirai after the loss of her brother. At times, if she feels powerless to help, she sits curled up with her arms around her legs, silently worrying for others.

Her warmth, however, is matched by caution and volatility. She is deeply suspicious of those who have not earned her trust, threatening both Gen and Senku early on. In fact, after Senku misinterpreted her words as a confession, she would not even fall asleep near him without clutching her knives. Yet when she feels safe, she has no difficulty dozing off anywhere, regardless of circumstances.

Kohaku is also marked by her impulsive, choleric temper. Though daring, she is prone to reckless outbursts when her friends are endangered—sometimes putting herself at serious risk, as during her ill-matched fight against Tsukasa. Senku, Gen, and Kokuyo have tried to temper these reactions, with little long-term effect. Over time, however, she encounters fewer situations that push her into blind rage, especially when she remains with her close allies.

Despite her fierceness, Kohaku admits she struggles with the idea of killing. She often seeks validation before taking such extreme action—asking Senku’s approval regarding Gen’s fate or even leaving the choice up to Gen himself. While she has made many threats, they usually reveal her dependence on others’ judgment rather than a true willingness to kill. Her sense of justice, combined with her impulsive nature, leads her into dangerous encounters, yet it also defines her as someone who protects others with both her strength and her heart.

Interests and Outlook: Kohaku is a playful and outdoorsy woman who enjoys physical activities such as swimming, running, sparring, dancing, and even modern sports like snowboarding. Skilled in hunting, combat, and survival, she often contributes through physical labor, though she occasionally helps with smaller projects.

Abilities and Skills Enhanced Physical Prowess: Kohaku is renowned in her village for her combative abilities and superhuman physical talent. She has been praised by world-class fighters for her strength and skill, and she is capable of matching even elite opponents in training battles. Though not invincible, she consistently proves herself one of the strongest warriors among her peers.

Enhanced Strength: From a young age, Kohaku trained her body by carrying heavy loads, such as a large pot of boiling water weighing nearly 50 kilograms for her sister’s care. This feat highlights her remarkable endurance and raw physical power.

Enhanced Speed and Agility: Her greatest advantage lies in her speed and reflexes. She fights with rapid strikes of blades and kicks, reacts swiftly to surprise attacks, and is known for her unmatched running ability—only equaled by specialized scouts like Homura.

Enhanced Coordination: Kohaku demonstrates remarkable control over her body, able to juggle multiple objects at high speed while maintaining focus on conversation or other tasks.

Enhanced Senses: She possesses extraordinary eyesight, capable of noticing subtle celestial shifts, spotting people or resources from long distances, and identifying useful details in her environment.

Hunting: Kohaku is a skilled hunter, adept at tracking and capturing wild animals with ease. Her sharp senses and experience make her one of the most reliable providers in the village.

Instinct: Her survival experience grants her a sharp instinct, allowing her to quickly assess situations, recognize danger, and make effective decisions under pressure.

Intelligence: Though not a scientist, Kohaku is resourceful and quick to understand strategy. She adapts to complex plans, uses coded signals, and can apply practical reasoning in critical moments, such as using the petrification weapon to save an ally. She also shows aptitude for basic arithmetic and tactical thinking.

Fine Motor Skills: While not a craftsman, she has the precision and dexterity to handle delicate tasks. She successfully opened fragile containers without damage and carved crystals with optical accuracy, proving her careful hand despite her reputation for brute strength.

She has a lively sense of humor and often teases her friends, especially about romance, sometimes playfully offering hugs or joking about marriage. Although she rarely shows direct romantic advances, she has a consistent curiosity about love. She eagerly observes romantic situations, supporting her sister Ruri’s relationship with Chrome and commenting enthusiastically on others’ experiences. Affection comes naturally to her, and she enjoys physical closeness like hugging, though she dismisses shallow or lustful advances.

Despite her tomboyish nature and lack of interest in traditional feminine roles, she does not tolerate insults to her femininity. While she is unbothered by casual situations like swimming or changing around men, she reacts fiercely if she feels disrespected.

Kohaku is also outspoken, often voicing her thoughts openly — whether to explain her actions, express disapproval, or state the obvious. She has a habit of using elaborate or archaic language, influenced by her sister Ruri, which sometimes leads to misunderstandings. Confident and assertive, she often punctuates her speech with a firm “Hah!”

Though uninterested in deeply studying science like her friends, she occasionally engages with it, asking sharp questions and gradually developing an appreciation for its impact. Over time, she comes to value science not just as knowledge, but as a force that unites people across places and generations. This humanistic view shapes her reflections, from comforting allies in moments of despair to contemplating the enduring legacy of their shared struggles.