Nice vectoring and composing different scans to balance elements!
I can see your coloring is now more stable in terms of choosing right colors.
However lighting and shadows needs lots of improvement. Like in this wallpaper the light source for Mirai is from left,
Kanbara's from back left, but look at background especially the shadows casted by railings, the are on left side that
means sun is on right side right? So the characters and background aren't blending (they look like they belongs from
different sources of light) Also try to use textures on clothes, ground etc part they'll give some depth in your
artworks.
alenas.deviantart.com/art/Basic-Lighting-Tu(...) <------ Our Alenas has made an awesome tutorial for explaining how
lighting works, it's really helpful so I'll recommend to read it thoroughly.
But still you're getting better, so keep it up! <3