Oooooh that sounds awesome! I'm addicted to making animated presets x3 They are so much fun for me. I'd like to do this for ya, however I need a bit of information.
Mind providing a ref sheet for Cosmo? I think i've seen one around but it might be best you link it here.
And perhaps provide a little more information about what you would like the fire to look like. Is there an image of what the wing colors and designs are? If not, please describe what you would like them to look like to the best of your ability and I will get right on it.
Also, feathered wings or bat wings?