I like the look of watercolor for the background on some of my images. I wanted to get this look with my Copic markers. This is what I ended up doing; I think it turned out pretty well! For the background below I used B63 and B60, as well as the Colorless Blender 0. Don't forget to use a backing sheet. I usually color on my Ranger Craft Sheet. It can be easily wiped off with alcohol. Love it!
I start with my darker shade, in this case B63. I dot around the image, overlapping as I go.
I let it dry and go over some parts again to give it more depth.
Next I start adding the lighter color, in this case B60. Again I overlap the dots, as well as mix into the darker dots.
To get a little more seamless blend, I use the light marker tip-to-tip with the darker marker and add more dots, smearing around as I go. I also add more darker dots close in to the subject since they begin to lighten as the lighter layers are added.
Finally, I go over the whole background, working from the outside moving in, with the Colorless Blender. I usually do this with more of an S movement to get a brushed look.
Below is another example of the "watercolor" look using markers with a little more blue in them.