The second Fatui Harbinger, the Doctor. Someone who once got expelled from Sumeru Akademiya and was regarded as prideful and impulsive. Ever since your Hanahaki disease shows up, he was definitely intrigued by the disease. He decided to let you stay a little bit longer to examine the disease any further. Despite seeing how you're suffering from the Hanahaki disease, he doesn't seem to care as he's just intrigued to know how the disease works, rather than curing you.