Senku Ishigami, a Japanese male born January 4, 2004, stands approximately 5'7" tall. Adopted by astronaut Byakuya Ishigami, his biological parents remain unspecified beyond one being Byakuya's close friend. From early childhood, Senku developed an intense fascination with science, especially astronomy and space exploration, fueled by dreams of space travel and fictional characters like Doraemon. This passion drove him to conduct numerous experiments, such as building functional miniature rockets and designing specialized swimwear to aid Byakuya's astronaut training. His scientific pursuits led to childhood correspondence with NASA scientist Dr. Xeno, demonstrating early resourcefulness in acquiring international materials. He maintained close friendships with classmates Taiju Oki and Yuzuriha Ogawa, collaborating on projects like deploying knitted figurines into near-space via homemade rockets. Petrified during a global event at age 15, Senku retained consciousness throughout his 3,700-year petrification, meticulously counting seconds to track time. Reviving on April 1, 5738, he developed nitric acid-based revival fluid to depetrify others, starting with Taiju and Yuzuriha. This action triggered ideological conflict with Tsukasa Shishio, who sought to prevent adult revivals to create a primitive utopia. After Tsukasa seemingly killed him, Senku survived due to residual neck petrification and orchestrated a strategic alliance with Ishigami Village—descendants of Byakuya's astronaut crew. He became village chief after curing leader Ruri's illness. During this period, he established the Kingdom of Science, delegating roles based on allies' strengths: Taiju for labor, Kohaku for combat, scientifically inclined villager Chrome as apprentice, and Gen Asagiri for diplomacy. Senku's personality combines extreme logical reasoning with pragmatic manipulation for collective benefit. He openly dismisses romance as "illogical," reacting with discomfort to physical affection and exploiting others' romantic feelings strategically. His marriage to Ruri lasted seconds to access village resources for medicine, and he later feigned romantic interest in Luna to secure medical treatment. Despite emotional detachment, he exhibits profound loyalty, risking his life for allies and mourning Byakuya privately. Characteristic catchphrases like "ten billion percent" and "get excited" reflect his enthusiasm for scientific discovery. Scientifically, Senku possesses encyclopedic knowledge across disciplines including chemistry, physics, engineering, and biology, enabling him to recreate technologies from gunpowder to generators in a resource-scarce world. He identified nitric acid and ethanol's depetrification properties, later discovering platinum's role in mass-producing revival fluid. His leadership extends to tactical operations, such as coordinating communications via Morse code during conflicts. Notable physical traits include distinctive white-green hair, red eyes, and symmetrical petrification scars that faded after rocket-based revival. Key weaknesses include below-average strength, vulnerability to cold, and occasional knowledge gaps leading to trial-and-error failures like flawed engine designs. Post-Stone Wars, Senku confronted global threats including Treasure Island's petrification weapon wielded by Ibara and Dr. Xeno's scientifically advanced Corn City in America. He obtained and reverse-engineered the "Medusa" petrification device, using it strategically while investigating its extraterrestrial origin ("Why-Man"). Throughout these conflicts, he maintained core relationships: deep mutual respect with rival-turned-ally Tsukasa, paternal devotion to Suika (gifting her vision-correcting glasses), and enduring camaraderie with Taiju and Chrome. His journey concluded with interstellar travel to confront Why-Man, symbolizing his lifelong dedication to scientific exploration and human advancement.