Betsu Ten Gai is a prominent antagonist in the series Thunderbolt Fantasy. Known for his enigmatic and sinister demeanor, he is a powerful necromancer who seeks to gain control over the ancient and mystical sword, the Tian Xing Jian. His actions are driven by a desire for ultimate power and domination, making him a formidable adversary for the protagonists. Throughout the series, his cunning strategies and dark magic pose significant challenges to the heroes, cementing his role as a central villain in the story.