Thats so cool! Incredible work
Could I ask what pen(s) you used? On the right looks like a brush tip?
I would love to know how you managed to get such clean lines, if you only used a brush tip type pen? Whenever I try with one, my hands either shake too much trying to be really gentle to get a fine line, or the line ends up way thicker than I intended.
edit
OP is not the original artist (and literally states the artist in the title) - I missed that, my bad. Not calling OP out
If anyone has suggestions or comments on using brush pens, that would be really appreciated!