so I was held at gunpoint making this. i'm sorry this is my first osc project of 2026. how to vector: use the line tool and place where necessary, then use the reshape tool to curve it, then your shape is done! (tip: you could use outlines to block shading, just make the main outline(s) front and what's in them nothing,) (tip2: to get a weird curve, you would press alt+click+drag it should have both sharp and curve as options, then try to twist it.)
btw I added more to mustard, loliscratch20 didn't do behind the mouth.