As far as I know Ebrietas was found on the Isz chalice by the Church as a form of a little slug, The church discovered the great ones and the use of blood incluence on the Phumerian with her and founded the Choir Church branch to take care of her in that chamber. While Bryenwerth and Micolash do their respective search but Ebrietas had other plans in mind, she slowly grow up and started to get into the Healing church members minds. When Wilhem knew this it was a little too late the Healing Church closed the gates and let Yharman die while ebritas summons all the human great one babies or she was the one who made the females pregnant all this time?.
The timeline is really confusing, we have Gehrman who in the history have lived centuries then was used as the Hunters Dream host, Eileen is an old lady but she is the last hunters of hunters not the first one. Micolash who is the only host in the game's night with the player Hunter but you can see several host before him and it looks like the church recently discovered the host mechanic. Djura who is old but no as old as old yharman I wonder when they decided to burn Old Yharman looks like it was a week ago but the locked door like like it was sealed by years .
Queen analise who is probably older than Gehrman alonside with the Executiones who arent a Hunter branch, they existed before the Hunters creation using the corrupted blood as a weapon against them yet Alfred looks pretty young to be part of the executioners and talks about Logarious incident like it was on the recent hunters nights era
afaik, the healing church was founded by Laurence who parted ways with his master willem, after the scholars of byrgenwrth discovered the "holy medium" in the tombs bellow yharnam, that was a chalice which they used to get old blood from the Great Ones.
Laurence saw the potential and used it to form the healing church, still, the healing church saw that there was something wrong with the blood and it had the beast scourge as a secondary effect in some people, so the healing church was founded with 3 branches:
- The choir, who provided the church with old blood as well as a investigating more on the Great Ones and gaining insight, they keep they eyes closed as a remembrance of Master Willems oath, which they did not obey
- The Hunters who took the job of killing anyone showing the scourge of the best, they wear black attires for 2 purposes: hiding in the night, and also as a remembrance to the dark jobs and how hidden they should be.
- The school of mensis which was in the job of investigating the Great Ones, how to solve the Sourge of the Beast and also any other way to help the church ascend to a greater plane, like the Great Ones.
of course, we see in the game what each of them became, and after the Old Yharnam incident a different church was made, the church Ludwig founded, the Healing Worshop Church because Laurence could not predict that the Old Blood became over used and a hell lot of people became infected by "ashen blood" (the first symptom of the Scourge of the Beast)
The school of mensis then went terribly wrong since they seemed to have found a way to access the nightmare realm by the use of One Third Umbilical cord from the Great Ones, Micolash performed a ritual with it. All his scholars, as well as he himself parted to the nightmare realm, but the consequence of that ritual was a real hell on Yharnam, everyone, more than before, started transforming into beasts
BTW, queen analise seems to be of the same time as Queen Yharnam, because she recognizes the Betrothal ring, an artifact that was only used by the Pthumerians (presumably, Queen Yharnam used it)
The voice comes from the brushes, naughty.
it is a bug, that voice is the last seconds of a sound clip from one of the Yharnamites near Arianna's house