Gen Asagiri, formerly a professional mentalist renowned as the "world's smoothest talker," endured global petrification alongside humanity. Revived millennia later by Tsukasa Shishio, his initial mission was verifying Senku Ishigami's demise. Discovering Senku alive and witnessing his scientific prowess, Gen defected to the Kingdom of Science, prioritizing its potential to rebuild civilization over Tsukasa's vision. His appearance showcases distinct bicolored hair—black left, white right—a shift from his original fully black hair. A jagged petrification scar once traced from his left eye down his cheek, healed after his second revival. He typically wears a lavender-pink Japanese-style coat over a wheat-colored yukata, secured by an orange sash, and often prefers bare feet. Gen masters psychological manipulation, leveraging acute understanding of human behavior to deceive, negotiate, and strategize. He employs stage magic, convincing impersonations (including female disguises), and sleight of hand for distraction. His multilingual fluency (Japanese, English) and Morse code proficiency facilitate covert communication. Though he projects laziness and self-interest to evade physical tasks, pre-planned countermeasures like concealed blood packs reveal resilience, as seen when surviving a spear attack. Throughout the Kingdom of Science's growth, Gen acts as a vital strategist and mediator. He manipulates adversaries such as Hyoga during the Stone Wars, sabotaging weapons and feigning loyalty before openly joining Senku. As one of the Five Wise Commanders, he specializes in "soft skills," translating scientific concepts and motivating allies. Joining the Perseus voyage to find the petrification source, he prevents Kohaku's rash confrontation after the crew's petrification on Treasure Island and aids in psychologically profiling the inhabitant Amaryllis. Gen forms key bonds: mentoring Suika, collaborating closely with craftsman Kaseki, and respecting Senku's ingenuity despite frequent feigned shock at ambitious plans. Though occasionally making perverted remarks or acting selfishly, his loyalty manifests through repeated sacrifices for the group's survival.