Only in the absence of the Sun's gaze is Luna's glory evident. Under the dark sky when mortals are dreaming and Fair Folk are lured by their hunger Lunars stir.
The Wyld doesn't endanger Lunars any more than their Essence does. The Fair Folk are things made from the Wyld that have made themselves lies to exist in Creation. Lunars are Creation-born who've become host to an Essence that contains Wyld energy and connects with their own soul. This interaction between their soul, their identity as a being and the fusion of Wyld Essence with it through the intergration of their Exaltation is what makes shapeshifting possible. Through changing their now mutable Essence they can change their physical form.
