The Blood Of Demons
He used some light healing magic to cure if there were any internal bleeding. He wanted to make sure that all other things were normal.
Of course, since there were no other injuries, the magic didn't work.
Nevertheless, he started the real treatment.
He then injected a bit of mana inside her right after which she took a look at the amount of poison that she had absorbed.
Her body was made to reject poison, but since she was absorbing a lot, the body started repelling more too.
Due to this, the talent of infinite poison resistance grew stronger. That was also a reason why the food that she was eating was being ejected.
Yes, she wasn't affected by the poison. In fact, this just made her stronger. She was only weak because she couldn't eat anything. The same was true with water – as long as the water is holy water, she could drink.
If it were ordinary water, then her body would repel that as well without absorbing even a tiny amount.