Ukyo Saionji, a former SDF Navy sonar operator, wields exceptionally sensitive hearing honed during his naval service, enabling precise target detection vital for intelligence operations. Respected for analytical prowess prior to the 2019 petrification event, his rational judgment and technical acumen positioned him as a strategic asset. Revived by Tsukasa Shishio, he ascended within the Tsukasa Empire while privately clashing with its violent ideology, covertly aiding Senku Ishigami’s faction to prevent lethal statue destruction—acts he deemed equivalent to murder. Formally joining the Kingdom of Science as a Five Wise Commander after negotiating a peace alliance, Ukyo spearheaded critical missions: exposing Gen Asagiri’s Lilian Weinberg impersonation during a pivotal call and unraveling Treasure Island’s irregular statue patterns. His pacifist ethos drove nonlethal combat tactics, deploying archery with surgical accuracy to immobilize foes—pinning Chrome’s clothing mid-fall or disarming adversaries without injury. The Treasure Island Arc challenged his ideals, compelling acceptance of Senku’s reversible petrification strategy as a bloodless alternative. During Kirisame’s ambush, his swift intervention disabled the Medusa mechanism, preserving Ginro’s life and turning the tide. Later, in South America, temporary petrification by Stanley Snyder’s forces proved a tactical setback before his revival and continued contributions against the Why-Man threat. Bilingual fluency in Japanese and English allowed Ukyo to encrypt communications, shielding intel from enemies. His acute hearing deciphered Morse code transmissions, while analytical rigor assessed risks during reconnaissance. Though typically composed, he visibly reacted to Senku’s ethically gray maneuvers, underscoring his unwavering moral code. Post-global revival, Ukyo aided Superalloy City’s construction before joining the San Francisco expedition to confront the Why-Man, prioritizing regional reconstruction over broader campaigns. His arc traces a pragmatic idealist navigating a brutal world—adapting tactics without compromising nonviolent principles. Physically distinguished by short white hair, green eyes, and a lean frame, Ukyo’s attire evolved from an orange turtleneck and paper cap to Kingdom of Science-branded gear. A petrification scar, replicated as a loyalty emblem to Senku, remains a permanent yet unspecified bodily marker.