Shiryuu Chouun serves as a Special A-Rank fighter for Seito Academy and stands among the Five Tiger Generals alongside Unchou Kan-u, Ekitoku Chouhi, Bachou Mouki, and Kouchuu Kanshou. She carries the soul of the legendary Chinese general Zhao Yun, inheriting his epithet "The Eternal Victorious" and his near-flawless combat legacy. Her long silver hair partially obscures her ears and forehead, and she typically keeps her eyes closed. She stands 170 cm tall with measurements of 89-59-87. Her standard outfit features a brown vest layered over a striped white collared shirt, a dark brown skirt accented with red trim, knee-high black socks, and brown loafers. A tiger tattoo is visible on her left shoulder blade during specific moments. She wields the Youtou Muramasa "Zanryuu" from the Hyakuhekitou collection, employing the technique "Shiden Issen." Chouun embodies calmness and profound loyalty, consistently prioritizing non-violent conflict resolution. She displays unwavering dedication to Seito Academy's leader, Gentoku Ryuubi, declaring a willingness to sacrifice her life for Gentoku's protection. She also follows orders without question from Koumei Shokatsuryou, hinting at a pre-existing connection. While generally reserved, subtle emotional depth surfaces, like disappointment when over-trimming a bonsai. Romantic implications toward Gentoku are suggested by blushing during physical contact. In *Ikki Tousen: Dragon Destiny*, Koumei dispatches her to secure the Dragon Jade. She defeats a weakened Teni, transports an unconscious Ryomou to Hakufu's residence, encounters Ryomou's awakened dragon, and withdraws after Ukitsu confirms Hakufu's dragon is controlled. She ultimately delivers the Dragon Jade to Unchou Kan-u and relays Koumei's message regarding the "Crouching Dragon." Her role in *Great Guardians* centers steadfastly on protecting Gentoku. Acknowledged as one of Seito's strongest fighters, rivaling Kan-u, she effortlessly thwarts an assassination attempt on Gentoku by Kakouen Myousai and multiple assailants, emerging unscathed without visible effort or damage to her uniform. Her full combat potential remains largely unquantified due to limited challenging engagements across the series. Chouun occasionally reveals cat-like pupils when opening her eyes mid-combat, suggesting a controlled connection to dragon powers shared by other key fighters, though this trait remains unexplored. Her background includes an unrevealed history with Koumei prior to the series events.