Muffet is a miniboss the protagonist encounters in Hotland. She runs a bake sale, being very angry at passers-by who do not purchase anything from it despite selling overpriced items for 9999 gold. She was a bought-in character during the Kickstarter for the game.

Muffet is an anthropomorphic spider monster with periwinkle or lavender skin, five eyes, six arms, and two legs. She wears red rompers with buttons in the front, a red ribbon across her chest, as well as twin pigtails in her hair. She is also shown holding two teacups with her top pair of hands and two teapots with her middle pair.

Her pet accomplice appears to be a giant muffin with a face on the frosting part as well as spider legs sticking out of the sides.

Muffet is often portrayed as a greedy, stingy, intimidating and somehow hypocritical monster, although having a courteous and sweet way of speaking. Even so, she seems to have a quite malicious aspect on her personality whenever she is crossed, something that occasionally triggers her fight. During her battle, she also has a tendency to cite morbid or inappropriate things, such as commenting on the protagonist's possible fate in being used to make food.