Sai the elf: That might be exactly, why she was going to Ethel. Hats are powerful and I think, if you are really lucky, they are even helpful. The halfling girl in the hags lair is there because of her sick mother, but the question is, if they had change it and if we would have just knock her unconscious, if it would be Helia ( like with the Minsc recruitment). Maybe we found out beforehand, that she needs help and can be saved somehow.
I'm now avoiding knocking out characters, I knocked out Mayrina's brothers and the game still treated it as if I killed them, despite telling her, that they're alive, I learned that knocking out characters treats it as murder.
That is true, but in the quest to recruit Minsc it was a mechanism to get him later as companion.
"We are all stories in the end. Just make it a good one."