Hello!
Here's a step-by-step WIP's sequence of recent Sonia picture (original lineart by Legoman)
As you may see it was a pretty straight forward process, the only complicated thing were the sheets since you have to keep them somewhat random - took me a while to find a decent reference images
If you'd have any questions about the coloring process of this picture - please don't hesitate to ask me! You can either reach me here in the comments or drop me a message on Discord (AleskaArt#1058 )Will be more than happy to answer!