The way the two of them interacted in the snow cave e fastest we have seen Emma let down her walls. Talking a to perfect stranger who had as good as condemned her to death she is sharing her lack of magic control, growing up alone and talking about Henry. What was also shocking was that Elsa seemed to be in a similar sharing mood while still portraying the shadows of her over a decade of isolation left on her.
We need to see more platonic SnowSwan scenes in further episodes.
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“The truth isn't easily pinned to a page. In the bathtub of history the truth is harder to hold than the soap and much more difficult to find.” - Terry Pratchett