Born and raised among Avari in the east, beyond the Sea of Rhun, late in the Second Age. She is of mixed Nandor-Sindar-Avarin heritage. Much of her family perished in the wars of the Last Alliance. Her parents were friends to the Blue Wizards since first they came to Arda, and later died in their service, trying to make Middle Earth a better place.

She then came west with her Sindarin grandmother, who was tiring of the world. They dwelt in Lorien a while, until the coming of the balrog to Moria. Her grandmother then sailed from the havens in the south, and Liltheniel became alone and independent.

She has remained so. She roams Middle Earth, often joining one of the many bands of wandering elves, but seldom the same one twice. She goes from one elven outpost to another, and delights in their festivals and revelry, but yet remains apart. And as her parents did, she works for the wizards, who seek to help the world to organise itself against the powers of evil.