A character from Genshin Impact, he is the second of the Eleven Fatui Harbingers, known by his codename "The Doctor". He first appeared in the supplementary manga before his first in-game appearance.
Prior to becoming a Fatui Harbinger, he was a researcher from Sumeru known as "Zandik". He was exiled from his homeland for performing unethical experiments and "enhancing" humans. Pierro would later recruit him to join the Fatui. He finds his name "humorously ironic."
