Kuroro Lucilfer is a central antagonist in the anime and manga series Hunter x Hunter. He is the enigmatic and highly intelligent leader of the Phantom Troupe, a notorious group of thieves with formidable Nen abilities. Kuroro is known for his calm demeanor, strategic mind, and mysterious aura. He possesses the ability to steal and use other Nen users' abilities with his skill, 'Skill Hunter.' As the Troupe's leader, he commands loyalty and fear, making him a significant threat to the protagonists.