Kohaku

Biodata

Background / History

Kohaku lived in Ishigami Village with her older sister, Ruri, the village priestess. Ruri had suffered from frailty and persistent respiratory illness since childhood. Following the village elders' advice, Kohaku fetched an enormous jar of hot spring water every day to bathe and wipe down her sister, hoping to ease her symptoms 27 28.

During one of these trips, a tree suddenly fell and pinned Kohaku beneath heavy logs. Senku and Li Xiang freed her with a pulley system. Although her legs were temporarily stiff and numb, she escaped serious injury and immediately worried about delivering Ruri's water. She thanked her rescuers and led them toward the village 27.

When Li Xiang offered to examine Ruri, Kohaku pleaded with Kinro and Ginro to admit the outsiders despite village rules. After permission was granted, she brought them directly to her sister. She subsequently joined their search for medicine-making materials, offering her knowledge of the mountains, ores, herbs, and terrain. Ruri ultimately recovered completely after treatment with the team's antibiotics 28 29 50.

Appearance

• Hair: Golden; described as short at her introduction, while later passages describe long hair usually secured in a practical high ponytail 27 100.
• Eyes: Clear blue eyes 27.
• Build and features: Slender despite her extraordinary strength, with striking, well-defined features and beautiful bone structure 100 208.
• Harem infiltration disguise: Wore a simple pale-colored dress, understated makeup, and her conditioned hair loose over her shoulders, softening her usual fierce appearance 100 216.

Personality

Kohaku is fiercely protective of the people close to her. Her daily efforts for Ruri continued despite the heavy burden and dangerous mountain route; even immediately after being rescued, her sister's care took priority over her own discomfort. She also challenged village restrictions when they prevented a doctor from reaching Ruri 27 28.

Her confidence in her fighting ability can make her favor direct action. She proposed fighting through Tsukasa's checkpoints and later asked whether the Science Kingdom could begin its attack. However, she also recognized that Xeno's superior technology required a different approach rather than a frontal confrontation 60 70 149.

Her gentleness is especially apparent with frightened companions and Watermelon. She comforted Li Xiang after the sulfuric-acid gorge jump and reassured the older Watermelon that growing up would not change their bond. This loyalty can override caution: when Stanley captured her teammates, she shook off Gen's warning and rushed out to rescue them 65 170 177.

Abilities & Skills

Strength and Endurance

• Carries a jar of hot spring water so heavy that even four adults would struggle to lift it 27.
• Shoulders the largest and heaviest basket of mined ore with little apparent effort 55.
• Is selected alongside Maguma to help restrain cattle and sheep during slaughter because of their exceptional strength 58.
• Completes Li Xiang's demanding space-training regimen alongside Stanley, while Senku collapses from exhaustion 191.

Martial Arts and Blade Combat

• Is described as Ishigami Village's strongest fighter in overall combat ability, with speed, explosive power, and reflexes beyond ordinary skilled opponents 41 42.
• Defeats Ginro within a few exchanges during the village tournament 42.
• Uses powerful kicks to knock opponents down and create openings for teammates to retreat 47 123.
• Intercepts Ukyo's incoming arrows with her short blade while fleeing through the forest 63.
• Later wins the first Petrification Women's Martial Arts Tournament and becomes the nation's chief self-defense instructor 198.
• Limits: Hyoga outmatches her in their earlier duel, and her blade-based fighting cannot overcome Stanley's concentrated gunfire 79 170.

Agility and Jumping

• Easily crosses the sulfuric-acid gorge without a gas mask and catches Li Xiang on the opposite side; the later replay gives the gap as 7.8 meters 48 65.
• Catches Chrome after Maguma throws him across a cliff 63.
• Uses elastic rubber footwear to leap across an Amazon gorge 165 226.
• Quickly overtakes the fleeing Nanami Sai and brings him back to the group 181.
• Uses the Moon's low gravity to dodge Metal Man's attacks while drawing his attention 195.

Senses and Scouting

• Detects faint, deliberately muffled footsteps and recognizes danger near Senku and Chrome's expedition 46 65.
• Has explicitly described 5.0 vision, allowing her to spot distant teammates and Chrome's position through the forest 63.
• Surveys the island shoreline for patrols before her group moves out 97.
• Notices the seam in Metal Man's helmet, enabling Li Xiang to remove its outer shell 195.

Local Knowledge and Infiltration

• Knows the mountain terrain, herbs, and ores well enough to offer guidance during the search for antibiotic ingredients 29.
• Helps install a concealed communication telephone inside Tsukasa's territory 61 62.
• Carries messages delivered through Senku's Mechanical Mouse and participates in the Harem platinum-retrieval operation 103 104.
• Literacy limit: Recognizes “platinum” in Senku's message but cannot read the full text, so she takes it to Li Xiang 103.

Dance

• Performs a graceful, lively dance at Thorn's Harem talent show, temporarily setting aside her usual sharp demeanor 116.

Equipment / Weapons / Items

• Short blade / short sword — Her principal documented combat weapon; used to deflect arrows, fight Hyoga, and cut captives' restraints 63 79 170.
• Earthenware water jar — Used for her daily deliveries of hot spring water to Ruri 27.
• Gas mask — Given the expedition's last spare mask before she and Li Xiang pursue the endangered gathering team; she later chooses to escape the fumes by jumping instead 46 48.
• Mechanical Mouse — Carries secret messages between the Harem infiltration team and Senku's group 102 103.
• Rubber-soled footwear — Provides additional spring for her rainforest gorge crossing 226.
• Backup net gun — Carried at her waist during the confrontation with Metal Man 195.

Relationships

• Ruri — Older sister and the original reason Kohaku assists Senku and Li Xiang. She cares for Ruri throughout her illness and helps gather materials for her treatment 27 28 29.
• Li Xiang — Rescuer, trusted teammate, and close friend. Kohaku checks on her apparent illness, offers to cover her camp work, and supports her after the dangerous gorge jump. Li Xiang regards Kohaku and the other companions as family 38 49 65 108.
• Senku Ishigami — Rescuer and Science Kingdom leader. Kohaku protects his expeditions, tries to force him to rest after days without sleep, and accompanies him on the lunar mission 27 46 88 191.
• Watermelon — A younger companion she treats affectionately. She praises his helpfulness, worries when he disappears, rescues him from Stanley's forces, and embraces him after her revival 30 42 170 177.
• Chrome — Fellow local helper and expedition teammate. She helps him gather resources and catches him during the escape from Ukyo's forces 29 55 63.
• Gen Asagiri — Infiltration teammate. She reacts to an incoming attack by pushing him aside and later carries him out of the encirclement with his injured ankle 62 63.
• Maguma — Fellow village fighter. They coordinate Chrome's escape across a cliff, with Maguma throwing him and Kohaku catching him 63.
• Hyoga — Initially an opponent who nearly defeats her; later a teammate. During Stanley's assault, he shields her from gunfire, and she remains beside his fallen body in grief 79 170.
• Stanley — Initially the commander pursuing her group; later her fellow lunar astronaut and combat partner against Metal Man 170 191 195.

Story Role / Major Arcs

Ishigami Village and Ruri's Treatment

• Introduces Senku and Li Xiang to Ishigami Village after they rescue her, providing their first connection to its residents 27 28.
• Joins Chrome as a local helper for the antibiotic project and helps Watermelon spread word of the team's village event 29 36.
• Announces the upcoming martial arts tournament, whose winner gains the village resources needed to brew alcohol for medicine production 41.
• Defeats Ginro in the opening round and is drawn against Senku in the semifinals. Senku ultimately becomes village chief 42 43 44.
• Helps rescue the sulfuric-acid expedition from Hyoga's men, catches Li Xiang across the gorge, and escorts her home 46 47 48 49.

Conflict with the Tsukasa Faction

• Restrains and escorts Homura into village custody after Li Xiang incapacitates the scout 52.
• Accompanies Gen and Chrome to install the telephone, then protects their retreat from Ukyo's pursuit. Maguma's diversion enables her to bring the others to safety 61 62 63.
• Takes over the fight after Hyoga wounds Kinro, but is driven back. Li Xiang's threat against Homura stops Hyoga's imminent attack and forces his surrender 79.

Island and Harem Infiltration

• Spots land before the Perseus is attacked. Li Xiang saves her and Ginro from the islanders' petrification attack by jumping into the sea with them 94.
• Enters the Harem infiltration operation in disguise and works with Li Xiang to access the platinum hidden in the central tree. Their nighttime attempt is interrupted by a guard, forcing them to withdraw 100 103 104.
• Performs at the talent show, coordinates with the arriving Science Kingdom members, and alerts the group when Li Xiang cannot be found 116 119.
• Fights the island soldiers during the assault, but Xudi petrifies her with a rapidly activated device. Senku and Chrome subsequently revive her, and she immediately joins the search for the remaining statues 123 129 130.

Americas and Rainforest Crisis

• Joins Tsukasa and Hyoga in capturing Xeno during a night raid, then carries the bound scientist away 149.
• Frees Francois and Watermelon from Stanley's forces while Tsukasa and Hyoga cover her. The defenders are overwhelmed by gunfire; Hyoga dies shielding her, and Kohaku is killed soon afterward 170.
• Is the first person Senku revives when the petrification crisis ends. She reunites with Watermelon and helps welcome the rest of the group back 177.

Lunar Mission and Restored Civilization

• Is selected as the lunar team's combat specialist and launches with Senku and Stanley aboard the Five-Stage Return Rocket, using internal petrification during liftoff 189 191.
• Acts as a decoy against the lunar mech and Metal Man, signals her teammates to clear Stanley's shot, and helps restrain the captured opponent 194 195.
• Trains diligently after civilization's restoration, wins the first Petrification Women's Martial Arts Tournament, and becomes the nation's chief self-defense instructor 198.
• Accompanies Gen when they bring Li Xiang to meet her resurrected parents, and later provides security and logistical support outside the time-machine laboratory 201 202.

Notable Quotes

“Kinro! But they're good people! They saved me! And now they can save my sister! Rules can't think, but people can!” 28

“Li Xiang! Don't be afraid! I'm right here! I'll catch you, I promise!” 48

“No matter how big you get, you'll always be my Little Watermelon.” 177

Trivia

• The narration repeatedly compares her strength to a gorilla's; this is a description of her physique and power, not a separate species designation 55 65.
• Despite her formidable fighting ability, she protests when Li Xiang groups her with the children forbidden from drinking wine 59.
• The bonus viewing chapters include an alternate-timeline counterpart written as [Kohaku], who initially does not recognize Li Xiang 204.