I got this ask around when I posted the last twitter dump, I believe, so I assume watercolor-wise you’re talking about that unfinished drawing with Pearl and Steven? Because those watercolors are, well, watercolors : ) Used a dip pen for the lines as well, I believe (G pen nib?). I like using Chinese calligraphy brushes when I do watercolors because they can hold a loooooooot of water and/or paint, so that’s an option : ) For the fake digital watercolors I do sometimes, I use Clip Studio Paint.