Gentoku Ryūbi leads Seito Academy, embodying the spirit of Liu Bei. She has auburn hair often in dual ponytails, green eyes, and a notably buxom figure with measurements of 96-61-92, typically clad in her Seito uniform. Inherently kind and protective of friends, she generally lacks combat skill or strategic intelligence, often seeming carefree or oblivious to her leadership duties. Her latent power, "Rairyuu" (Lightning Dragon), involuntarily triggers a violent, sadistic alternate personality when allies face danger. This transformation radiates destructive energy, risking self-harm and uncontrolled attacks. In *Dragon Destiny*, her dragon first awakens during an assault by Kyoshou Academy, leading to confinement after she injures allies. The capture of her devoted protector, Kan'u Unchō, by Kyoshou's leader Sousou Moutoku pushes Ryūbi to embrace leadership. She forges an alliance with Nanyo Academy, participates in the Battle of Chibi, and merges dragon powers with Hakufu Sonsaku to defeat Sousou. *Great Guardians* explores her relationship with Kan'u, who harbors unrequited romantic feelings. Ryūbi's obliviousness causes friction, culminating in her possession by Saji Genpou via Ryōfu Hōsen during a theme park incident. As the possession spreads across Seito, Kan'u intervenes sacrificially, enduring a near-fatal injury from Ryūbi to break the control, repairing their bond. Ryūbi expresses deep appreciation for Kan'u. By *Xtreme Xecutor*, Ryūbi shows increased responsibility, rescuing an unconscious Bachō Mouki and overseeing her recovery. Despite this growth, her dragon's influence persists, occasionally forcing her into a comatose state as it ravages her body, requiring Kan'u's intervention to subdue these episodes. Notable media differences exist: her initial dragon outbreak critically injuring Kan'u, Chouhi, and Ryomou Shimei occurred three years pre-manga storyline, while the anime shifts this to *Dragon Destiny*. The English manga adaptation added elements of homophobia absent in the original Japanese version.