Have you ever noticed how the word speaks of wisdom in a feminine since?
I think it runs much deeper than the beauty of poetic language that Solomon has chosen to use as he is inspired of God to pen the book of Proverbs.
I believe if we were to dig deeper, and uncover the foundation and root to why he refers to wisdom as "she and her", we would find it in Genesis.
It was God who said, "It is not good that man should be alone..." so He created and brought to him all the animals but there was not found among them ANY that was a suitable help meet or companion. So God put Adam to sleep, took a rib FROM him, then fashioned and made for him a woman, from his flesh and bone. It was not good for man to be alone, without a woman, and "It's not good" than man be without wisdom. I think this is why the inspired writings of God refer to wisdom in the feminine voice, pointing us back to the garden.