Münchhausen II is the son of a deformed German scientist affiliated with the occultist Vril Society and the Nazi Party. His father attempted to summon the Kyō-Ō (Evil King) for Adolf Hitler in 1944, claiming it was the god Odin. The failed experiment triggered Hitler's death and the destruction of their Berlin headquarters by Allied bombers. Though Münchhausen I was executed for this failure, Münchhausen II survived and retrieved the mystical orb used in the ritual. This catastrophe forged his obsession with dominating the human, demon, and man-beast worlds, convinced this required killing the prophesied Chōjin (Overfiend), the supreme god destined to merge the three realms. Sent to a Hitler Youth academy, he pursued occult research in secret. Upon discovery, he murdered the principal and sacrificed a secretary to summon the demon Kohoki. Kohoki revealed the existence of the parallel worlds and the Chōjin legend, cementing Münchhausen II's goal: to rule the tripartite worlds by eliminating the Chōjin. By the 1990s, he relocated to Tokyo and constructed a new portal in Shinjuku's Shintocho Building. Believing Tatsuo Nagumo was the Chōjin, he ordered Kohoki to kill him, but the demon refused. Münchhausen II traveled to the man-beast world, killed the guardian of the Gokumonkyō shrine, and seized its idol as a vessel for the Kyō-Ō. He orchestrated a plane crash killing Takeaki Kiryū's parents, Nagumo's cousin. Saving Takeaki with Nagumo's blood, he manipulated him into a monstrous pawn tasked with kidnapping women as sacrifices for the Kyō-Ō. To ensure Takeaki's complete transformation, he tormented him with visions of his dead parents and kidnapped Megumi Amano, intending Takeaki to kill her and sever his humanity. His plan fractured when Kohoki rebelled against sacrificing Megumi. Münchhausen II used the orb to mentally dominate Kohoki, forcing him to fight Megumi's brother, Amano Jyaku. Amano destroyed the orb and severed Münchhausen II's arm, leg, and eye with a helicopter rotor. The machine overloaded and exploded, yet Münchhausen II survived. He replaced his lost limbs using mechanical components and transported Takeaki's corpse to the Gokumonkyō shrine, impaling it to activate the idol with his blood. In the 2020s, after the Chōjin's apocalypse merged the three worlds, he adopted the pseudonym "Faust" and allied with the tyrant Caesar. Together, they built an empire in ruined Tokyo, enslaving the Makemono race. Using Caesar's resources and his occult knowledge, they created Negros from Nagumo's discarded heart, intending to merge it with the Kyō-Ō to form Faburil, a demon designed to kill the Chōjin. Münchhausen II replaced his destroyed orb with the Gokumonkyō idol's third eye, implanting it within his mechanical hand. He captured the Makemono fugitive Buju, mistakenly believing him to be the Kyō-Ō. After Buju escaped with Caesar's daughter Alector, Münchhausen II pursued them to the Valley of the Eagle. There, he identified the infant Himi as the true Kyō-Ō and saved her from Nagumo's attack by summoning Negros. He imprisoned Himi within the Gokumonkyō idol to merge her with Negros. During Caesar's nuclear strike against the Chōjin's lair, Münchhausen II battled Amano Jyaku atop a missile. Faburil emerged but sustained damage from the Chōjin's counterattack, forcing Münchhausen II to retreat. After Caesar's empire collapsed, his organic components began decomposing. He sought out the Makai princess Yoenki, manipulating her into believing Amano Jyaku killed her brother. This alliance marked his final effort to consume the Kyō-Ō's blood and achieve godhood.