That’s easy! Grillby would run a pub where monsters, pirate or not, are welcomed. Muffet baker/merchant. - Lurker!Anon
Hey good idea! I couldn't think of another fire colour I HAVEN'T used, so I made a water Grillby!
there is a jellyfish that sometimes drifts through him, and he has heard the 'water you doing?' pun so much that it hurts.
But with supply issues and no threats to her spiders, UC Muffet would probably make clothes, and maybe make sweets from coconuts or some other plants to give to people who buy things from her spiders.
She would hear about the human either through her spiders or from other monsters and stop them on their journey to figure out their motive. Of course if the human has purchased anything from her spiders, she'll thank them and let them move on.