Dottore

Conventional wisdom holds that divine knowledge cannot be rationally understood. After attaining Divine Vision, he will take his next step. Dottore, also known by his alias "The Doctor," and whose real name is "Zandik," is the second of the Eleven Heralds of the Fatui.

Dottore's personality in Genshin Impact is that of a mad scientist: manipulative and amoral, a genius who despises human life, seeing it as a plaything for his experiments and a path to human "optimization," driven by a thirst for knowledge that led to his expulsion from Sumeru. He appears calm and calculating, but also cruel and obsessive, willing to do anything to achieve his goals, though sometimes his methods yield unexpectedly beneficial results.
Key features
Amoral Scientist: Their main motivation is truth and knowledge, regardless of ethical means.
Contempt for Human Life: Considers humans as mere experimental material, without feeling remorse for the harm caused.
Obsessive and Ruthless: He seeks human perfection and the transmutation of the gods, often through extreme and painful experiments.
Selfish and Proud: His pride and selfishness lead him to act, even if it is only to prove a point or to avoid feeling personally insulted.
Versatile (and Multiple): There are several versions of Dottore (the "Dottores"), each representing a stage of his life and thought, from a young idealist to a bitter scientist, being

About the Doctor

“I heard that he took parts of himself at different ages to make prototypes and assigned different tasks to each one. I know… All my colleagues are rather eccentric. Come to think of it, if he were to meet a prototype of myself… Ha! We'd have to fight on the spot to decide who survives.” From this text by Childe, it can be concluded that the Doctor, using prototypes, divides himself into many individuals, which can be understood as the Doctor's simultaneous existence in adolescence, youth, prime, and old age within the same timeframe.