Nienna

Nienna
Tolkien's legendarium character
Aliases	Fui, Qalmë-Tári
Race	Ainur
Book(s)	The Silmarillion (1977)

Nienna [niˈenna] is a fictional character in J. R. R. Tolkien's legendarium. She is introduced in The Silmarillion as one of the Ainur (angelic beings), one of the Queens of the Valar and one of the Aratar.

She was the sister of Mandos and Irmo. Her name meant She who weeps. She lived in the far West of Arda, grieved for the suffering of the world, and comforted the spirits of the dead who waited in the halls of Mandos:

[S]he dwells alone. She is acquainted with grief, and mourns for every wound that Arda has suffered in the marring of Melkor. So great was her sorrow, as the Music unfolded, that her song turned to lamentation long before its end, and the sound of mourning was woven into the themes of the World before it began. But she does not weep for herself; and those who hearken to her learn pity, and endurance in hope. Her halls are west of West, upon the borders of the world; and she comes seldom to the city of Valimar where all is glad. She goes rather to the halls of Mandos, which are near to her own; and all those who wait in Mandos cry to her, for she brings strength to the spirit and turns sorrow to wisdom. The windows of her house look outward from the walls of the world. (The Silmarillion, Chapter 2, "Valaquenta")

Gandalf's rebuke of Frodo for wishing death upon Gollum in The Fellowship of the Ring is obliquely attributed in The Silmarillion to Gandalf's having been a disciple of Nienna in Valinor (Chapter 2, "Valaquenta"): "Wisest of the Maiar was Olórin [Gandalf]... [H]is ways took him often to the house of Nienna, and of her he learned pity and patience."

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Wikipedia