The maiden paused, as if again

She thought to catch the distant strain.

With head upraised, and look intent,

And eye and ear attentive bent,

And locks flung back, and lips apart,

Like monument of Grecian art” — Sir Walter Scott’s Lady of the Lake

In Idylls of the King, Tennyson split the Lady of the Lake into two characters, the Lady and Vivian. The former was a benevolent spirit and the latter a seductive enchantress. In reality, they are the same person – good but not tame, beautiful and wicked, mortal yet not quite – the embodiment of Avalon.  

Photo credits:

Luthiae http://luthiae.deviantart.com/

Demicent http://www.flickr.com/photos/shootandpoint

Leucareth http://leucareth.deviantart.com/

Fabio Meschini http://www.behance.net/clockworkpictures