Genpou Saji, whose true identity is Shishi Ouin, is a third-year student at Nanyo Academy and one of its elite Big Four fighters. His Three Kingdoms counterpart is Zuo Ci, reflecting his mastery of manipulation. He orchestrated the betrayal and assassination of Chuuei Toutaku by manipulating Housen Ryofu, mirroring historical Three Kingdoms events. Ouin harbors romantic feelings for both Ryomou Shimei and Ryofu Housen, while frequently exhibiting womanizing behavior toward other female characters. During *Dragon Destiny*, he emerges from seclusion to stop Koukin Shuuyu from interfering with Hakufu Sonsaku's duel at Kyosho Academy. He rejoins Nanyo's forces for the Battle of Red Cliffs, where he deduces the Dragon Jade's power-suppressing capabilities during negotiations with Seito Academy. In combat, he faces Bun'en Chouryou to a mutual knockout and later teams with Ryomou to defeat Myosai Kakouen using a combined chi attack. His fighting style employs hypnosis and mind control, though he rarely wears his magatama publicly; his observed combat prowess suggests an A-level rank. Physically, he possesses light-colored hair that darkens when using Shishi Ouin's magatama. He typically wears Nanyo's standard uniform: a light-brown vest, buttoned shirt, and black pants. His personality blends arrogance, strategic cunning, and a tendency for perverse actions like non-consensual groping. A *Great Guardians* retcon reveals "Genpou Saji" was an alias. Another character, later identified as the real Genpou Saji, emerges—an anime-exclusive female master of illusion magic. Traumatized by bullying over her gothic appearance and insect fascination, she collaborates with Ouin to revive Ryofu, intending to harvest Ryomou's dragon power by manipulating romantic jealousy. Following *Dragon Destiny*, Ouin continues using the Saji alias while adopting a more lighthearted, flirtatious demeanor. He studies with Koukin and interacts casually with female fighters across factions, indicating a shift toward atonement for his past.