Gen Asagiri was a prominent mentalist and magician active before the global petrification event. Petrified during a live television broadcast, he revived thousands of years later when Tsukasa Shishio enlisted him as a spy within the newly formed Empire of Might. Tsukasa tasked him with locating Senku Ishigami and confirming his death. Initially disoriented and believing the situation an elaborate prank, Gen eventually accepted the reality of the Stone World. Infiltrating Ishigami Village, Gen's encounter with Senku revealed his modern origins through cues like recognizing cola. Witnessing Senku's advanced scientific accomplishments—including iron production and electricity generation—impressed Gen, leading him to offer to lie to Tsukasa about Senku's survival, marking the start of his shifting loyalties. He weighed Tsukasa's promises of less labor and a harem against Senku's offer of restored modern comforts. Ultimately, inventions like ramen and a functional generator persuaded Gen to defect to the Kingdom of Science. Gen combines cunning manipulation with genuine loyalty. A skilled mentalist, he excels in psychology, deception, and strategic forecasting. He frequently employs verbal quirks, flipping word halves or using Pig Latin when surprised. Projecting a self-serving, lazy demeanor to avoid physical labor and prioritize self-preservation, he nonetheless repeatedly risks himself for the Kingdom, such as preparing fake blood packs to survive Magma's spear impalement. Despite his calculated exterior, he shows kindness, bonding with Suika and Kaseki, and admiration for talents like Lillian Weinberg's singing. His skills extend beyond psychology to stage magic, sleight of hand, and impersonation, including convincingly mimicking female voices. He possesses notable endurance, traveling over 100 kilometers injured to deliver false reports to Tsukasa. He also demonstrates survival and tracking abilities, navigating wilderness terrain unaided to locate Senku's group. Fluent in Japanese and English, he is proficient in Morse code, used to coordinate traps against adversaries like Homura. During the Stone Wars, Gen served as a key strategist. He manipulated Tsukasa's forces, tricking Hyoga’s troops into attacking during a storm and sabotaging their weapons. Later, he facilitated communication between Senku and Tsukasa, leading to a truce after Tsukasa's injuries. As one of the Five Wise Generals, Gen focused on diplomacy and psychological operations, negotiating for resources, mediating conflicts, and motivating allies, such as deceiving Ryusui Nanami into funding the Kingdom's ventures. Gen transitioned from opportunism to dedicated allegiance, admitting Senku's vision for scientific progress won him over, though he maintained pragmatic motivations like requesting cola as a reward. His later actions emphasized protecting the Kingdom, through espionage against Dr. Xeno’s group and supporting Suika during the second petrification event. Following Tsukasa’s revival and alliance with Senku, Gen continued leveraging his psychological expertise in global missions on Treasure Island and in South America. His appearance features a distinctive bicolored hairstyle—black on the left and white on the right—pale skin, and sharp eyes. His petrification scar, originally jagged across his left cheek, healed after his second depetrification; he later repainted it as a symbol of solidarity. He typically wears layered, lavender-pink robes tied with an orange sash, adapting to practical footwear during colder seasons.