Fatui Lore

I was in somewhat of a rush when writing this thread, and I must apologize for not emphasizing that this is a theory. Speculation on the evidence we have.

La Signora has a soft spot for children. Arlecchino recounts how the Fair Lady brought gifts to the House of Hearth to receive affection from the orphans. This may be in part due to a subconscious yearning for the life she could have had with Rostam. #Signora #Arlecchino

Capitano likely wasn't in charge of the Phlogiston Extraction Research Center. The banners are old, Capitano's plan never involved refined phlogiston, and the man with black fur is the Pyro Agent. The Harbinger in command never disclosed the purpose of the experiments. #Capitano

Dottore's segments have similar constitutions to the Raiden Shogun. Ei used Khaenri'ahn technology to build her body, with Scaramouche being an early prototype. Wanderer Character Story 4 states that Dottore reverse-engineered him to create his segments. #Dottore #Scaramouche

The Harbinger Sandrone has ties to the Adventurer's Guild. The organization originates from Snezhnaya, and the Katherynes (bionic Snezhnayan puppets) resemble the Marionette. This may indicate that she is the "important figure" that will greet us in Nod-Krai. #Sandrone

At Wangshu Inn, there is a man named Landa who claims to be from Mondstadt. He is actually a Fatui spy working for Pantalone. It is heavily implied that he was the Snezhnayan merchant who tried to destroy Mondstadt's wine industry from Noelle's Character Story 2. #Pantalone

There is a good chance that the Harbinger Dottore has severe motion sickness. Zandik's Note in the Wounded Shin Valley details how a piloting trial went awry due to "severe physiological side effects caused by disrupted balance". #Dottore

Only 4 Harbingers have been confirmed to be associated with Project Stuzha. Pulcinella and Pantalone are seemingly leading the project, with Arlecchino's "children" being involved as potential sacrifices and Tartaglia being recalled. #Pulcinella #Pantalone #Arlecchino #Childe

Historically, very few have managed to access the Ruin Golem on Devantaka Mountain. Among the known few is Pir Kavikavus, a genius hailed as the pride of the Akademiya's Kshahrewar Darshan. The other was a young Zandik, secretly researching Khaenri'ahn technology. #Dottore

Before the Cataclysm, Il Capitano was the Khaenri'ahn Commander Thrain, with his immense combat prowess earning him the title of "Sentinel Knight". However, his title in the original CN text is 天柱騎士, which directly translates to "Heavenly Pillar Knight". #Capitano

Arlecchino may have inadvertently given Dottore the means to burn Irminsul. Her flames have demonstrated to have memory-erasing properties, which The Doctor experimented with in their collaboration. Irminsul serves as a repository for memories in Teyvat. #Dottore #Arlecchino

Pulcinella is known for making sacrifices for greater gains. When the Ninth Company's supply line was cut off in the Chasm, his subordinate Anton noted that he wouldn't hesitate to abandon them as less valuable assets. This is reinforced by Arlecchino's voiceline. #Pulcinella