Recommended Prompt:

chibi, feral, rabbit, pink fur, yellow inner ears, red glasses, blue ribbon on head, yellow chest fur, blue crescent gem, white pearl necklace,

Negative:

circle eyebrows, clothing, anthro, hair, glasses vine, simple background, white background,

Luna is Jewelpet of netherland dwarf rabbit. she was mostly a different color of Ruby, but with the start of the 7th season of the anime in 2015, the charm point of glasses was added.