Free
Subtle Fuzz Brush
This pack is free — download it straight from the author's page. All rights belong to the author; BrushCatalog links to the original source.
How to install: download the file, then in Clip Studio Paint, drag the .sut file onto the Sub Tool palette (or Sub Tool palette menu → Import Sub Tool). More details →
Similar brushes
Rough blur
CSP
It's just a slightly gritty blur tool. I think it goes well with blurring analogue-ish…
Downloadassets.clip-studio.com
simple droplet chain_render
CSP
she was just a little brush...... ⚞^. .^⚟
Downloadassets.clip-studio.com
simple droplet chain_line only
CSP
just a very very simple brush for drawing simplified chains and such~....
Downloadassets.clip-studio.com