Hm...I think that your outfit looks great.

Add the silver moon blue sky background ?

remove the box on the ground

I'd add more black to match the tail in the ankas.

Hmm..get rid of some black that overlaps the red to show more red..? xD

I'd remove the armband. :3

I would remove the headphone.

I would add some blue onto your outfit.

remove the scythe

I would add hair xD

Place some white along the bottom and middle (just small items like anka anklets stuff) for balance

remove staff.

Remove Faust's boots.

remove the winged boots (my opinon)

Remove the staff