I don't think he killed any sharings. The mages said one of the sharings killed all the others and in a flashback we saw a sharing with similar hairstyle accusing the ml of not loving her so I assume it's a yandere situation
If you re-read the later chapters, you’ll see that the ML hasn’t used sharing or participated with “sharing,” as he did mainly mage support so he didn’t use his mana too much to need a “sharing,”.
As regarding to the sharing incident, I believe his sharing wanted to monopolize him or some sorts hence why he’s fearful of love or has that attachment style and shuns off sharing which he did to the MC in the beginning.
I’m thinking the main conflict of the series will be her belief in the religion and her world and his hatred of god for being a bystander in the world
I don’t trust the blonde ML. How many sharings has he killed?
I’ll keep reading but I hope this isn’t one of those stories where the FL runs away.
It would be some cute smut fluff if the ML isn’t sucking her soul dry or whatever