Koushaku Chouno

Driven by a desperate, obsessive hunger for immortality, this sinister antagonist serves as a primary threat to Kazuki Muto and Tokiko Tsumura. Known by the alias Papillon, he possesses a frail, sickly appearance and unsettling eyes, a physical state caused by a mysterious, debilitating disease. Using his Busou Renkin, "Near Death Happiness," he pursues eternal life at any cost. Alongside his grandfather Bakushaku and brother Jizou, he stands as a formidable foe until the L.X.E. emerges.