You seem to switch between two names. Lily, and Luna. Both are nice names, but please pick one. Idk maybe one is an alias.
Also the wings sound too much like an angel's to me, and kind of superheroish. When I think wings on someone I think automatically of angels, Hawk girl, Birdman, Falcon, Dark Mousy and Krad from D.N. Angel, and mythical creatures.
Last thing is 100 pounds even if it is muscle is still highly unhealthy for someone of that height. For this to be a healthy weight the person must be no taller than 5'2. A strong physical human being needs some weight.