(Re-upload due to technical difficulties!)
This is an edited version of the default G-Pen in Clip Studio Paint! It has a more grainy texture to it that makes it like a kind of pencil or rough inker. It’s a good cartooning brush for sketching, doodling, and even line work! I recommend using a smaller canvas size and Dpi for optimal outcomes, though you're free to edit the brush to fit your tastes and use whichever canvas size you want!

You can also make the brush have color and could use it for coloring, though it might be best for sketches/doodling and line-work since it doesn’t come with any painting aspects--like color-mixing and such.
I hope you all find this brush enjoyable! I dedicate it to all the cartoonists out there :b
