The meeting of Melian and her great-granddaughter must have been …a lot
Imagine: you are an Ainu. You took part in singing the world into being. You entered into it, clothing yourself in the strange sensation of material body, according to need and fancy. Then you met a creature — a creature that you had no part in making, that was alien to you, but also eerily familiar. You fell in love
Your clothing became an inseparable part of yourself the greatest wonder, and then among the flowers you bore the strangest child for many ages. You were happier than you could imagine back then, before time.
And then your daughter died of love, and you knew you'd soon lose her beyond the ending of time and space and anything you could comprehend. And then your husband died of stubbornness, and part of you knew that him at least you will regain eventually, but this part was inaudible beneath the shattering of your very essence when a part of you was ripped up and faded like old cloth, and you were torn from everything you knew, and you knew that you must go and leave those you love defenseless — or clothe yourself in your grief and despair and become something you weren't made to be.
And, not very long after, while your tears haven't even fully started flowing, there come a couple, and he bears the very thing that got your daughter and husband killed — and in its light, the promise to push away every grief — and she bears the very face of your daughter .
You welcome them with the others, your heart breaks and breaks (it was broken already), but this is how it must be.