𝟏. Senku Ishigami.

— Taiju Oki: His best friend since childhood. Loyal, strong, and someone Senku trusts completely.

— Yuzuriha Ogawa: A close friend since before the petrification. Senku greatly values ​​her kindness, manual dexterity, and practical intelligence.

—Chrome: One of his most important allies in Ishigami Village. Senku recognizes him as a true scientist in potential.

— Kohaku: A reliable and protective warrior. Although they argue sometimes, Senku greatly appreciates her strength and constant support.

— Gen Asagiri: Cunning, charismatic, and an expert at manipulating situations. Senku often relies on him for strategic plans.

— Kaseki: An extraordinary craftsman from the village. Thanks to his talent, many of Senku's ideas were able to become a reality.

— Tsukasa Shishio: An ideological rival and one of his greatest obstacles. Even so, Senku recognizes his ability, leadership, and strength.

— Incomplete Knowledge: While Senku possesses an incredible amount of knowledge about science and technology, it should be noted that he doesn't know everything in as much detail as he appears. 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 with things he never knew how to do in detail. —Low physical dexterity: Senku is below average in terms of physical ability, lacking physical strength. 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 (although it's not a fair comparison, given her training and status as a warrior). — Bad luck: Throughout the series, despite his great intelligence and ability to overcome obstacles, he often gets into trouble due to his terrible luck.

— 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. — Mental resilience: Although Senku lacks physical ability, he more than makes up for it with his determination and persistence. — Craftsmanship: As a child, he designed and built a functional miniature spaceship, along with many other advanced and experimental machines. However, Senku doesn't compare to a master craftsman like Kaseki in terms of construction skills, as Kaseki has far more experience than him. — Tactical intelligence: In addition to his scientific intelligence, he seems to have some skill as a strategist. —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.

— “Ten billion percent”: This is his most characteristic phrase. He uses it to express complete certainty about something, such as when he knows a plan will work or a theory is correct. It reflects his extreme confidence and his exaggerated way of speaking. — Putting a finger in the ear: This is a gesture he often makes when he is thinking, analyzing a situation, or when something seems obvious to him. It shows his relaxed and carefree attitude, even under pressure. — “ku-ku-ku”: A low, peculiar laugh that appears when something goes as expected, an advantage is discovered, or one is excited by an intellectual challenge. — “This is going to be exciting”: He says this when a difficult problem, a new challenge, or a complicated situation arises. — Stay calm: Even in tense moments, she usually maintains a calm attitude. Instead of panicking, she thinks clearly and looks for solutions. — Speaking directly and sarcastically: He doesn't sugarcoat his words. He usually says what he thinks bluntly, often with dry or mocking humor.

Senku is a thin, frail 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 fall across his face. He has piercing red eyes, thin eyebrows, a small nose, and a mouth that often curls into a mischievous grin.

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.

Senku is an extremely intelligent, logical, and self-assured person. He has a sarcastic and defiant attitude, and he usually appears confident and unfazed by problems. He is persevering, disciplined, and always seeks practical solutions instead of letting emotions guide him. Although he may seem cold or distant, he actually cares about others and shows his affection through actions rather than words. Independent and rebellious against senseless authority, he has complete faith in science and his ability to overcome challenges.