@Akera93 : And I'm talking about mental stability, not mental maturity.
She basically suffer from emotional whiplashes that spilled over into that slap.
Start with negative impression of him.
Turn into more hopeful positive one when she pondered the timeline of him coming up with the medicine written in the letter to her father.
Then she came here and spend several days of hearing only negative rumors/atmosphere, and now there's this story of him personally killing people with many people talking about it.
So she went to him, hoping to hear the truth, or rather that he denies it, and got her hope crushed and he even 'gloated' about the deed.
Hell, even Harold who IS trying to push her away is mentally hurt about the slap (told Zan he wanted to be alone + woke up late in this chapter), what did you expect?
>I personally think she is boring, unnecessary and adds nothing to the story.
You know what would actually make her a boring, unnecessary character that adds nothing to the story? The very same thing you suggested earlier:
>I do expect her to not bother him and try to force her ideals on him
If she simply exist without any character of her own or influence on any characters/story, why does she even need to be mentioned?