This is Cancer, the Darklight (Which are Doveflower's species). Her species are similar to their rivals, the Nightlights (Also Dove's species). You can find out what a Nightlight is by going to Dove's art book and going through it,  But they're pretty much the same. Nightlights have Dragon-like wings, and can make their spots/speckles glow, and Darklights have Feathered wings, and can turn invisible.
Anyway, here's the art!