Comments posted to our Dark Souls 3 Wiki
the soul of my waifu....I am MAD
Giving the soul does not End Yuria's quest. only healing the Dark Sigil does.
"hmmm it says i can use it, i wonder if it will activate that effect of boosting my estus"
This does not end Yuria's quest. I've done it on every playthrough with no repercussions. However, healing the dark sigil via the soul WILL end the quest.