Oh wow, this is cute, innocent, and beautiful... I really love how this have some together, and the lighting and colours are just so stunning! You said based on a story concept..? So is it a future story-in-progress? Because this image has already sold me in the area of interest in it, that's for sure!
I can tell you spent a lot of time on this! I love her face, and the style you used. Some of the shading and details could use some work, like more cracking in the rock, or skin tones. Nice use of perspective!
There were many times I gave up on trying to draw non-human type of creature, but this time I loved the idea too much that I just can't allow myself to let it go, and at the end it turns out the way I want, it's very rewarding!