The floating head turning to dust is Musou/Flavio. It was painted by hand (water colors) and then color stripped. The other person is Hanabira/Hanabi. He was inked by hand and then given some life in PS6.

The point of this is a little spoiler to a future event in SF, hence Hanabi's odd outfit.

Many brushes used were downloaded from DA. I will try to remember them all later.