Senku Ishigami²

Senku is a slender young man of average height with pale skin. He has white hair that turns green at the tips and naturally stands on end in soft spikes. Two strands of hair fall across his face. He has piercing red eyes, thin eyebrows, a small nose, and a mouth that often curls into a mischievous smile.

She has two symmetrical petrification scars on her face, irregular lines that start from the inner corner of her eyebrows and extend toward her hairline. Occasionally, smaller scars are also visible, descending from the inner corner of her eye.

Before his petrification, Senku wore a typical school uniform with a lab coat over it. After awakening in the Stone World, he fashioned an animal-skin robe with short, flared sleeves, an irregular hem that reached his knees, a protruding collar, and a seam that snaked down the front. He wore a belt around his waist that usually held at least one leather pouch, which he changed as needed. [22] His shoes were sack-like, made of the same leather as his robe, and laced around his ankles. He also had cloth wrapped around his forearms, which he used to protect his hands while conducting experiments. [23] On his robe, near his right collarbone, he had

The mass-energy equivalence formula (E = mc² ) written in his own blood.

During Minami's photoshoot with Senku for the hot air balloon launch event, Senku tried on fashionable outfits designed by Yuzuriha. [24] He also wore a fashionable suit when he played poker against Ryusui.

After his reappearance in South America, Suika gave him a red cloak to wear over his outfit, a symbol of friendship. [25] He still has his scars, and Senku speculated that they were due to exposure to the elements. [26][27] Later, he wears the village rope around his waist, hidden in his pockets. [28]

After being revived in the rocket, Senku's petrification scars have healed. [29]

Senku is a straightforward, self-assured, and logical person, also aware of the limits of his abilities. His decisions are usually supported by his vast scientific knowledge and the application of the scientific method. [30] Senku never looks down on those less knowledgeable than himself, though he has a habit of delving into complex explanations to try to teach others. [31] However, his enthusiasm for science encourages and inspires everyone around him to improve themselves. [32] Thanks to his charisma and kind nature, people tend to gather around him, both allies and enemies. Senku is also capable of admitting his mistakes, for example, if he omits important information, such as when Kohaku pointed out that the North Star was not aligned with the North Star as he claimed, since Senku had overlooked the Earth's precession. [ 33 ] Although Senku is very aware of his limitations and will defer to those more experienced than him, he frequently overestimates his own physical capabilities, such as when he volunteered to carry Kohaku's spring water and immediately collapsed, or when he was overwhelmed by the force of Kinro's attack during a paper shield demonstration.

Senku has a very logical mind, believing that there is nothing that science cannot explain, even if it takes a long time to properly understand any concept through science. [ 18 ] [ 34 ]

Senku often breaks rules, withholds information, and manipulates others to get what he wants. He often acts as if he creates inventions and uses people for his own benefit, when in reality he creates them for the good of others. [35][36][37] Beneath Senku's arrogance and manipulations lies a genuinely kind and selfless heart. During their decisive battle, Tsukasa observes that, despite Senku's apparent coldness, his greatest weakness is his inability to abandon his friends, having witnessed his kindness firsthand toward Yuzuriha when she was taken hostage. [38][39]

Unlike Taiju, Senku seems indifferent to the prospect of romance. He was annoyed when Kohaku complimented him in a strange way, claiming that she had fallen in love with him. [40] He strongly advised Nikki against developing feelings for him. He was also unfazed by Amaryllis's attempts to win him over, much to her annoyance. He believes that a brain full of love is utterly illogical, but he supports his friends' romantic relationships, such as Taiju's with Yuzuriha.

What Senku lacks in physical prowess, he more than makes up for in determination and persistence. He timed his petrified state down to the last second for nearly four millennia and willingly faced death [41] at Tsukasa's hands without flinching, refusing to give in and sacrifice Yuzuriha or the continued advancement of science for his own safety. Senku also defeats Ibara thanks to his ingenuity and the help of Ryusui Nanami. Senku is simply someone who refuses to abandon a task, no matter how arduous.

Genius Intelligence: Senku Ishigami is a genius with an encyclopedic knowledge of all things scientific. He is proficient in chemistry, physics, engineering, geology, biology, and mathematics. [43][44][45][46][47][48] Senku is able to easily create various useful tools and devices, medicines, and, most notably, the depetrification elixir, despite the limited materials of the Stone World. Tsukasa calls him "the sharpest and most intelligent man in the world." [49] In addition to his scientific knowledge, Senku also possesses great ingenuity and an analytical mind, and he never seems to run out of options. For whatever he lacks, he has an ally who can lend him their strength. He also possesses great mental fortitude, capable of thinking quickly and remaining calm in the most difficult situations. Among the currently active characters, his mental capabilities are surpassed only by those of his former mentor, Dr. Xeno.
Mental Resilience: While Senku lacks physical prowess, he more than makes up for it with his determination and persistence. For example, he retained consciousness during his petrification and counted the time he was petrified down to the last second for nearly 4,000 years. Gen Asagiri found Senku an impressive person after discovering that Senku had recorded the date of his resurrection. He wondered how someone could not know the day and year he was freed and stated that he already respected Senku. When he was petrified again three years later, he was prepared and began counting to remain conscious. [50] After his second resurrection, he was able to deduce that seven years had passed.
Craftsmanship: As a child, he designed and built a functional miniature spaceship, along with many other advanced and experimental machines. [51] However, Senku doesn't compare to a master craftsman like Kaseki in terms of construction skills, as Kaseki has much more experience.

Tactical Intelligence: In addition to his scientific intelligence, he appears to possess considerable strategic skill. He successfully coordinated the villagers and even some members of Tsukasa's army, convincing them to join his side in an effective and bloodless war against Tsukasa's Empire of Power. Similarly, he managed to infiltrate the Treasure Island boss's harem as spies, communicating with Kohaku and devising a strategy to cleverly gather the scattered petrified fragments of his friends, along with the gems from the Soyuz capsule. Senku also utilized Kohaku's eyesight to aid him in his poker match with Ryusui, ensuring that Gen wouldn't help him cheat.
Exceptional memory: Senku remembers every compound and method of his inventions. He has rarely made a mistake in crafting tools for the Kingdom of Science and possesses immense knowledge in the aforementioned scientific fields.
Charisma: Although arrogant and eccentric, Senku seems to understand people and their way of thinking well. He uses his numerous creations to charm those who distrusted him (such as ramen, glasses, and medicine) [52] and thus gradually gain their trust. Senku is also a capable and eloquent leader, able to motivate and guide the villagers to form an effective army against Tsukasa's Empire of Power. He has earned the loyalty and respect of his allies (and enemies) through his hard work and determination.
Language Proficiency: Senku demonstrates fluency in both Japanese and English. Initially, he struggled with English as a child, but over time, he became more proficient thanks to his travels. He understood Ukyo and Gen's conversation while they were speaking English through the buried telephone, concealing their conversation from others present. He was also able to understand Taiju and Dr. Xeno's argument without difficulty.

Incomplete Knowledge: While Senku possesses an incredible amount of scientific and technological knowledge, it should be noted that he doesn't know everything in as much detail as he appears to. Instead, he sometimes seems to fill in the gaps with his well-founded scientific thinking and experience. However, this has led him to struggle on several occasions with problems he was unfamiliar with or things he never knew how to do in detail. An example of this would be the manufacture of stone tools. While he had a general idea of ​​them and how to make them, he had to discover the specific techniques through trial and error. [56] He was also unaware that carbon filaments don't work in vacuum tubes, [57] and mistakenly thought it would be practical to build the Steam Gorilla's engine with only one cylinder, which he eventually corrected. [58]
Low Physical Prowess: Senku is below average in terms of physical ability, lacking physical strength. Even after spending months alone and having to gather resources on his own and build both a shelter and a storage shed, Senku's physical strength remained the same. He was unable to hold Homura, a petite woman less than 1.5 meters tall, after managing to grab her. He also admits that he wouldn't stand a chance against someone as strong as Kohaku in a fight (though it's not really a fair comparison, given her training and warrior status). [59] In a bonus chapter, Kohaku gives a brief description of the main characters' physical abilities. Senku is in last place with around three points, Chrome with five, Ginro with 100, Kinro with 500, and Kohaku herself with 1000. [60] Similarly, Senku has low stamina and tends to become physically exhausted quite quickly. He is also very vulnerable to hypothermia, only being able to withstand cold water for a short period of time. [ 61 ] Before his trip to space, Senku had to train until he could

Average Skill: Senku's skill is sufficient for creating useful objects and tools, but it took him considerable effort to reach that level. Although he knows a wide range of crafting methods, many of them were unknown to him before his petrification (such as pottery, stone toolmaking, and glassblowing), which limits him due to his inexperience. However, he improves throughout the series, achieving a practical level of skill in all of the aforementioned tasks. Even so, his aspirations for the Kingdom of Science were aided by having more experienced artisans to help him build more quickly. While Kaseki was initially hired for the specific task of glassblowing, Senku developed this skill on his own, as demonstrated when he created glass objects after Suika revived him alone in the Amazon rainforest.
Lack of Culinary Skills: While not a weakness in itself, he's not an exceptional cook. He demonstrates that he knows how to cook, but he lacks experience and quality ingredients. Although he understands the food preparation process, most of the time, his more elaborate dishes don't taste good. While he was able to make cotton candy and cola, more complex dishes, such as wine, ramen, and bread, turn out to be terrible. In the case of the ramen, part of the problem lies in not having the exact ingredients (he uses foxtail to make flour instead of wheat). When he tries to make bread with all the right ingredients for the first time, the result is so awful that no modern person is able to eat it (although the tribe from Ishigami Village loves it because they have only ever eaten fish and had never tried bread before).

Bad Luck: Throughout the series, despite his great intelligence and ability to overcome obstacles, he frequently gets into trouble due to his terrible luck. At one point, Gen remarks to Senku (while they are trying to manufacture gunpowder to stop Tsukasa's army and fail) that Senku is always unlucky. In the Petrification arc, when he goes to Treasure Island after all his resources and options have been exhausted, as he and the Kingdom of Science are cornered by Ibara, Moz, and their army, Senku is even forced to use his worst trick: reviving Hyoga (a rather unpredictable and cruel man willing to manipulate and kill anyone who gets in his way) to have a chance against Ibara and Moz, despite the high probability that Hyoga will immediately overwhelm the Kingdom of Science or discover the petrification device afterward. Later, Ibara uses the petrification device to petrify everyone except himself. While describing the Vikings' journey, a storm hits, but they still reach America thanks to Chrome. As they begin their exploration of the United States, the crew is attacked by alligators while Gen again remarks that Senku's luck is nonexistent and that all his worst-case scenario predictions usually turn out to be true. [62]