Aerlire (Aear+Lîr, "seasong") was born in Edhellond in the year 760 of the Second Age, a daughter of the House of Glingaer (Glîn+Gaer, "the sea gleams in the eyes"). Growing up in the southern haven of the Eldar, ever living under the growing shadow of Mordor and her own people leaving for the West in great numbers, Aerlire learned at an early age how to stand and defend, knowing that if she would not do so a fall was certain. Trained for years as she served Edhellond's banner, she joined her father Lagoron's side as the war between Sauron and the Elves began in the year 1693. Her home on the ground of Men, Aerlire had dealings with the mortal Race for centuries, her house fighting among them, and she herself witnessing how Umbar and Pelargir were built in the name of Númenor.

In the year 3430 the Last Alliance was made between Elves and Men, and Lagoron and Aerlire both answered the call of war. Both stood ready with their blades during the siege of Barad-dûr, again alongside the Men of Númenor. Lagoron fell in this war, and even though Sauron vanished after these years of battle, Aerlire would always remain bitter over a war she felt had not ended. After the presumed fall of Sauron the years of decline started for the Eldar and Aerlire started a more secluded life as a warden of her city, keeping lingering enemies at bay and making sure those who wished to sail West could do so in peace. During decades she watched from a distance how Númenor declined slowly, king after king rising and falling, and rumours reached Edhellond about new threats and shadows in Mordor and Mirkwood. But still the elven warriores remained silent, forever bitter over the loss of her father and mentor, deeming herself done fighting, only willing to defend what was left until the last of her kind would have sailed West.

In the year 3018 of the Third Age word came to the south, a letter for Aerlire written by her trusted friend Ariewen of Imladris, a keeper of lore and lost knowledge who Aerlire had once met on the borders of Eregion. Fragments of the letter urged Aerlire to pick up her blade once more and travel north, to Eriador, where new perils were in rising. For the sake of her old friendship only, and nothing else, Aerlire answered to the call and took the long journey north. Through circumstances Aerlire arrived first in human lands, and it did not take long until the Elda ran into Vinti, a ranger who saw she was on unfamiliar ground, and accompanied her to the lands of Evendim. Seeing a land that once belonged to the Númenoreans stirred Aerlire's heart, as did the man who showed them to her. Long had Aerlire known deep inside of her that, even though she defended those who sailed West, she would never do so herself. She had always known she'd live and die in Middle-Earth. Maybe it was this, among many other things, that made her heart more than willing to accept Vinti's hand, from now on taking on the name of his house, Alaghir.

During the following years Aerlire joined the cause of the Rangers of Evendim, making Tinnudir her new home, as she occasionaly travelled to Imladris to seek Ariewen out. She joined Vinti's tireless efforts to keep the grand city of Annúminas free of the forces of evil, and also made herself known and earned her ranks among the Rangers further east, aiding them from their stronghold in Esteldin. It was safe to say the Elf had fully returned to her old occupation, always fighting, always standing, never ceasing.

After years of both battle and happiness, darkness came over Aerlire's life as Vinti disappeared. As she waited and looked for him as long as she could bear, there came a point where the heart of the Elda seemed beyond saving. Aerlire left the lands of Evendim and travelled into Ered Luin, making her way to the Havens. She was last seen in Haudh Lin, and even her best friend Ariewen and her daughter Iselilja presumed Aerlire had fell to the burden of her heart and had never reached the Havens. But she remained alive, although barely, a lingering shadow under the diminishing trees, unhappy as she stayed, but unwilling to really leave. It was now she took on the name Daewathien (dae+gwath+-ien, "of the slender shadow"), a name that was once given to her in her time aiding Esteldin.

Aerlire was still seen, occasionaly, around Imladris, Duillond, and at times even Tinnudir, a place eternally close to her heart. It was recently that her heart finally gave in to a sorrow she could not bear any longer. After Daewathien's last ride, that took her to Imladris, she collapsed not to rise again. During her final moments - shared with her friend hiril Ariewen - it was her final wish that Cyras Neveris, Dunádan and her ally in battle, would have her sword Silivegil, to hold, keep and wield until his days as well would come to an end. Her ring, the Green Jewel of Alaghir, she gave to Ariewen, for her to give to Iselilja.

Aerlire's passing was mourned deeply, and until this day Ariewen and other Eldar of Imladris sing laments to honour her memory. Her life and her tale are an inspiraton to many, a legend to the world, and a warning to some.