Preface: I tend to do/explore the Archon quests at a snail's pace so this is why I am just getting to this now, lol. Apologies if someone has already brought this up!

I'm 99.9% sure the physician with the redacted name in the Eleazar hospital is Il Dottore, who as we know "treated" Collei's Eleazar through brutal and callous experimentation. Reading the bits of lore from the Ancient Key drawers was a really eye-opening view into his methods, redacted as they are, and into the elemental causes of Eleazar.

One sentence in particular really stopped me in my tracks: "Note: The enrichment process of elemental quantities in humans may be dynamically sustained." I had to reread this a few times. I was puzzled with the use of the word "enrichment." What do they mean by it?

A Wiktionary search shows that the term "enrichment" is also used to describe the process of making enriched uranium which is used in nuclear reactors and nuclear weapons. Given that Eleazar symptoms are reminiscent of survivors of atomic warfare or severe nuclear energy accidents—skin lesions, ulcers, etc.—and Il Dottore then talks about "recycling materials" of (dead?) specimens whose treatments were unsuccessful, I wonder what exactly is part of his treatment plans, and whether these "materials" that are key to successful treatment of Eleazar are in fact concentrated, "cancerous" elemental energy transmuted into something just as intense but with a rehabilitative effect. After all, every action has an equal and opposite reaction, and we now know that physics exists in Teyvat lol. Then it makes me think about if this same process is used in Delusion production, what it means to wield/harbor elemental energy in the first place, etc. but let me avoid that for now.

Anyway that was just something that caught my attention, not sure how much sense I made but my goodness the lore in this game is so good. Side note, Eleazar means "God has helped" in Hebrew.. "Teyvat" is sort of Hebrew in origin.. Vishaps are indigenous to this world.. hmm...