There is only 1 snake. Check out the eye of the one in the cave, it's clearly bloody. And when u get swallow by it after gun fort it just withdraw to its lair and***** you out. There maybe a continueity error?
no there are 2 serpent i checked it out at 1.04 at gun fort. After bridge scene. She has blind eye, can see from under water and-"puppetsu monkey serpent scene" his eye is not blind, can see from "after lying to wall" or "after pass her shortly after but not enter the first door"
Interesting thing to note: If you don't kill the first serpent when doing the plunge attack, it will swallow you and bring you to the entrance of the cavern with the dried serpent viscera. Shocked me when it happened by accident. You discover something every day.
There's a pretty cool lore item in the game that talks about how to marry the snake by being eaten by it. It's a really obscure riddle and I'm not quoting it. I don't remember where I found it but I think this information you're giving proves that this lore item is a riddle and I think you solved the riddle. Lol
Just wanna note that the Fresh Serpent Viscera is NOT the heart of the Serpent but its liver. It's mentioned by the divine heir I think. Anyway it makes me think that it didn't really get killed by Sekiro.