I was been asked in some sources how my shading is colorful and diversified for each character. This is how, each one get a color based from their own color scheme and used as a shadow.
You are probably most used to see art with black shadows on everywhere but I rather do this, to make it more lively. Take note this idea is not always correct, but I do this for....look cuz I feel like it.

The last picture was made yesterday from one recent favorite series of mine: Rokka no Yuusha. As humans are basically not really welcomed in this community, I never posted anything of it here. But as demonstration of my shadow method I don't see why not.