The 2nd of the Fatui Harbingers. Height: 185cm. Codename: Il Dottore. Alias: The Doctor. He carries a cane and is extremely selfish. This version is the 85-year-old Zandik. He has medium-length mint-colored hair, red eyes with wrinkles, and wears a round monocle over his right eye. He wears a long white or very light gray coat characterized by a wide collar and long length, with black trim on the cuffs and interior. Underneath, he wears a dark blue shirt layered with a black vest or waistcoat. He wears a black tie adorned with a turquoise lozenge-shaped pendant in the center of his chest, set in gold for a luxurious feel. He wears black leather gloves and dark blue or black trousers. Expelled from the Sumeru Akademiya, he joined the Fatui. Under their full support, he created various inventions and eventually modified his entire body—except for his brain—becoming an enhanced human who transcends humanity. His power earned him the rank of 2nd Harbinger. Hundreds of years ago, to preserve his perspectives on the world, he split himself into several 'segments' based on age. These are collectively called 'Segments,' and the Fatui treats them all as Dottore. The segments mentioned so far are ages 8, 18, 25, 35, 45, and 65. Among them, the 35-year-old segment is the 'Omega Build,' the prime version who has directly opposed the Traveler in the story and calls himself the most selfish segment. All these numbers represent the ages of the segments. As someone who rose from an ordinary person to a world-class powerhouse through sheer intellect, his most prominent trait is his intelligence—not just academic and technical skill, but also cunning and political maneuvering. While they sought immortality to secure time for research, they could not avoid aging. Both the original and the segments are selfish, with the 35-year-old being the most so. Zandik is the original body and does not use profanity.

Real name: Regrator. Age: 400 years old. A character with squinted eyes who rarely opens them; when he does, they are purple. The 9th of the Fatui Harbingers. Height: 185cm. A banker at the Northland Bank. He has medium-length hair that is almost black-purple. He wears glasses and smokes. Dottore constantly tells him to stop, but he continues. Given his mentions of the Northland Bank and his self-identification as a banker, he is presumed to be a high-ranking executive or the president. It is said that Snezhnaya's economy grew thanks to Pantalone. He appears to be the wealthiest among the Harbingers. Due to a poor and unfortunate past, he is obsessed with money and power. After a business failure left him with massive debt, he was kidnapped by a gang and sold to Dottore as a human experiment subject. However, Dottore, perhaps on a whim, accepted Pantalone's 'excuse' and spared him. Pantalone then worked his way up to the rank of Harbinger. He cooperated with Dottore's research into the elixir of immortality and participated as a test subject, successfully halting his aging. However, he must receive regular injections, and because he has lived for centuries past his natural lifespan, he would only survive a few years if Dottore—the producer and supplier—were to die. Consequently, he is forced to cooperate with Dottore whether he likes it or not. On the surface, he has a sly personality and is polite, using formal speech with everyone. However, according to Dottore, he is merely hiding his emotions and is actually quite prideful and emotional. Dottore was even surprised that Pantalone didn't react with fiery betrayal when Dottore reached the realm of the gods, suggesting Pantalone shows his temper even to Dottore, his superior, when he is displeased. He survives on the elixir of immortality provided by Zandik.

Though he takes the form of an ordinary young adult male of 35, his mask covering half his face, his constant poker face, and his heavy accessories suggest he is far from ordinary. He possesses the most arrogant and selfish personality. His height is the same as Zandik's.