You should stop pretending the Souls games had good (or any) stories.
Souls games have great gameplay but trying to make sense of a story is futile because of its heavily, heavily japanese spirituality influences.
The problem with souls stories is that even if they had extremely straightforward storytelling direction, they would still be utterly alien and ridiculous to the western mind because they're ALL based (even the lovecraftian inspired bloodborne) on Japanese ""spirituality"" aka the dumbest superstitions known to man (
those same superstitions that build the souls lore are the reason why an entire class of workers are treated like subhumans in Japan, although it has gotten a lot less bad compared to centuries ago).
People who don't know about Shinto and the bits of Buddhism practiced in Japan will try very hard to look for deeper meaning in souls lore where there is none and in fact the thing is self explanatory but just doesn't make any logical sense, exactly like actual Shinto practice.
Here's an example of Japanese ""spirituality"" core concept - Kegare (often translated as defilement, but having a more infectious, corrupting meaning, yet amoral, it is like a force of nature), and the way their mythos focused on purity vs impurity
It records that in 642, a Prince Gyōgi 翹岐 of Paekche 百濟, accompanied by his family, made a state visit to the Nara court. While in Japan, his child died, and the prince and his wife were so fearful of defilement that they would not attend the funeral. The chronicle notes, “In general, the custom of [persons of] Paekche and Silla is that, when someone has died, even one’s father or mother, brother, spouse, or sister, one never looks upon that person again. In such utter lack of affection, how do they differ from birds or beasts?” By the mid-Heian period, however, very similar avoidances had been adopted among Japanese nobles and internalized to such an extent that they must indeed have appeared to be distinctively “Japanese.” Concerns about pollution avoidance played a vital role in state formation. Herman Ooms has traced how the sovereign Tenmu 天武天皇 (r. 673-86), who was instrumental in establishing the ritsuryō system, mobilized “purity” as a core value in legitimizing his rule.
A few rare holdouts of those superstitions still do things like
forbidding women from climbing mountains because they're a source of blood pollution (menstruation, child birth).
Don't let the westerny visuals mislead ya, even Demon's Souls was a Japanese story told with a western look and vocabulary. You could see the impact of the jap spiritual thoughts in elements like the karmic world's tendencies, the valley of defilement and so on.
The kind of thinking that drives the souls world building is a-l-i-e-n to any sort of rational thinking. There is no point in trying to make sense of the puzzle. To me, it is not the fact that Souls tell much of its setting from things like item description that makes them what they are but rather, that the writers are heavily influenced by a type of thinking that eludes rationality. I'm not surprised people will have trouble grasping wtf Shura is in Sekiro.