ARYA STARK & MOTHERHOOD
This clear parallel foreshadows Arya’s journey into maidenhood. The Lyanna-proxy lays out hints of Arya’s pending evolution. We already see those changes happening as Arya moves towards her maidenhood.
Both Lyanna & Arya were tomboys and in Lyanna’s case, she evolves into her beauty and femininity. Arya has often shown disinterest in such things - but as the story progresses… is Arya also growing out of that way of thinking just like Lyanna did?
It’s rather telling that Arya develops a rather obvious fascination with Courtesans while she is in Braavos. Her bias for them is continually pointed out by George. Arya appreciates their beauty and grace. Would a young Arya in Winterfell give that a second thought?