Gentoku Ryuubi leads Seito Academy as the "Little Vessel," successor to Liu Bei. She is 17 in the manga and 18 in the anime, standing 160 cm tall with blood type B and measurements of 96-61-92. Her green eyes and long brown hair, typically tied in two ponytails, complement her frequent attire of glasses and the Seito Academy uniform. Initially unskilled in combat, lacking strategic intelligence, and showing minimal grasp of leadership duties, she nonetheless garners peer admiration through her kind, gentle, and deeply caring nature. She fiercely prioritizes protecting friends, physically interceding despite her ineffective fighting prowess. Her dragon, Rairyuu (Lightning Dragon), awakens as a Superpowered Evil Side—a merciless, sadistic alter ego that brutalizes allies and enemies indiscriminately, often while smiling. In *Ikkitousen: Dragon Destiny*, Rairyuu manifests during a Kyosho Academy assault triggered by Shimei Ryomou’s Dragon Jade activation. This transformation unleashes uncontrollable violence against peers, forcing her confinement in Seito’s basement until it subsides. Motivated by Unchou Kanu’s capture, Gentoku commits to leadership, joining Nanyo Academy against Kyosho. During the final battle, Rairyuu resurfaces but falls to Sousou until Hakufu Sonsaku intervenes. Their combined dragon elements (water and thunder) defeat Sousou, granting Gentoku partial dragon mastery. *Ikkitousen: Great Guardians* explores her dynamic with Kanu, who harbors unreciprocated romantic feelings. Gentoku misreads Kanu’s protectiveness as intimidating or embarrassing. When possessed by Genpou Saji via Ryofu Housen during an outing, she becomes a puppet manipulating Seito’s fighters. Kanu frees her by enduring a near-fatal strike, prompting a reconciliation where Gentoku admits, "I wanted to give my favourite book to my favourite person." In *Ikkitousen: Xtreme Xecutor*, Gentoku pursues greater leadership responsibility. Her development includes rescuing Bachou Mouki and sheltering her at Seito Academy, underscoring her enduring compassion.