Ahh right. I forgot about that ring. That's... very interesting and also really creepy. So the original meaning was probably to "marry" a suitable woman to a great one, a tradition that likely hearkens back all the way to the Pthumerians (recalling that Queen Yharnam looks like she's wearing a wedding dress, for instance). I'm not sure we can conclude that the practice has become more pedestrian since then, since offering the ring to Annalise really doesn't say much. The player is special, she is special, and we can't say for sure whether or not this act of betrothal would even be officially sanctioned if it happend during less tumultuous times. Also, I imagine you can give her the ring even if your character is a woman also, which raises all kinds of questions. (And yes, the uh... blood dregs sure have an interesting icon. Honestly that's an entire subject of its own, what they are, what a child of blood is etc)

Also, to me the description has a strong sound of eugenics. Even if we assume that marriage has become less esoteric nowadays, and permits unions between man and woman (as opposed to human and great one), it still sounds like some institution of power would get to decide who is paired with whom - to guarantee that special child bloodline. Might have, for instance, been an interesting angle for blood saints, somehow handpicking individuals with desireable traits and breeding them to create ideal vessels for the old blood.

That's kinda messed up and I like it. Given that Adelicia's parents are left entirely undescribed, it's an option. Hmmm...