Lady of Imladris

Elrond Half-elven wed Celebrían the daughter of Galadriel early in the Third Age. After the twin sons Elladan and Elrohir, their third child was a daughter, Arwen, born in the year III 241. As the daughter of Elrond, she had Half-elven blood, and so she remained immortal as one of the Eldar while her father remained in Middle-earth.

Over the next three thousand years, Arwen dwelt in her father's House at Imladris, better known as Rivendell. During the earlier part of this period, it would presumably have been Arwen's mother Celebrían who would have been known as the 'Lady of Imladris' or the 'Lady of Rivendell', though such uses of the titles are not recorded. After the loss Amroth of Lórien in III 1981, Arwen's grandmother Galadriel took up the rule of his land, and after this Celebrían and Arwen would travel from Imladris across the Misty Mountains to dwell for a time with Galadriel in the Golden Wood.

It was during such a journey that Celebrían was waylaid and captured by Orcs and, though she was rescued by her sons and cured of her wounds, she fell into despair. Celebrían departed from Middle-earth in the following year, III 2510, after which Arwen truly became the Lady of Imladris.

More than four centuries later, returning to Imladris from one of her journeys to Lórien, Arwen encountered a young Man in the forests surrounding her father's House. This was Aragorn, at that time a young ward of Elrond, and their meeting would have profound consequences for the Lady of Imladris. She would eventually wed Aragorn after he became the new King following the defeat of Sauron, and thus the Lady of Imladris became the Queen of Gondor. Arwen's choice came with a price, however, for when her Half-elven father Elrond departed into the West soon afterward, she became as mortal as her husband.