[She's almost convinced herself, a couple of times, that outside of the forest everything is normal. No one's realised what happened to her, life goes about as usual, everyone she encountered at the start of the week is fine... but then those old, well-remembered images she once was shown, her silhouette torn apart by an angry mob, keep replaying in her mind... and she just can't make herself go back to see for herself how things are.
So when she sees him approaching in the distance - sees the drawn sword - is it any wonder she's immediately on the defense? Unlike how things will play out back home she hasn't had any practise with her powers, and so her reaction is unsophisticated and instinctual: sharp icicles, at least half Arthur's height, shoot up from the ground right before him. As long as he stops they're not hurting him and he can easily walk around them, but the message should be clear: go away.]