One of the dragons living in the Silent Grove. Here she is lying somewhere in the the Emerald Dream.

I headcanon that trees in the Dream get absolutely ridiculous, tall enough that even the largest dragons could walk comfortably underneath. Of course they are also subject to dream-logic so even when you are deep in the Dream and completely enveloped by a massive forest that should by all rights leave the ground in complete darknessā€¦ you might find beams of light with no discernable origin.