In the anime "Dragon Knight," Green Dragon is a minor demonic antagonist associated with the forces inhabiting a demon-filled castle. This entity serves Queen Nena, the primary antagonist who captures female warriors and possesses magical jewels. Green Dragon actively confronts the protagonist Takeru Yamato, a swordsman destined to save the area and recover the jewels. The character's design features horns and a cape, consistent with other demonic figures in the series.