Just as I answered in a previous ask, majority of my works included experimenting so this is probably far from being the actual right way to achieve DR style but it’s what I did so ahaha sorry :v
I used Sai.
<—Soft line brush—Flat brush—Airbrush—Eraser—>
Soft line- Used for sketching, colouring, painting. You’ll need to be familiar with the pressure sensitivity when blending so better get a feel for when to press hard to get solid colours. Adjust the min size depending on where you’re using it, eg. at 0 for fine lines.
Flat brush- The whooshy effect lines. Again, adjust min size to your preference; set to 0 to get the pointy flick stroke.
Airbrush- Didn’t use it on John but tried on Jane. Mostly on her face to give it that glowing kinda look. Else, mostly used for minor adjustments of colours and extra blending.
Eraser- Self explanatory, adjust density to fit your needs. 20% then stroke a couple of times to get the whispy lines. I Used 80-90% for normal erasures
After sketching, added rough shading, then the base colours on a different layer underneath the sketch. I just flattened it afterwards and worked on one layer all through out.
I went and redid a lot of parts as I progressed.
For after effects, moved it to photoshop: duplicated the whole thing -> gaussian blur -> set blur layer to linear burn at 25% opacity
Also added a pattern overlay on the original layer: greyscale paper (kraft paper) -> Overlay at 45%