Her Personality:  

Muffet is notably calm, especially after learning of a human in the Ruins killing her spider friends. On the other hand, if she sees the protagonist holding a spider pastry that she did not witness them purchasing, she may accuse them of stealing it.

Despite her somewhat creepy appearance and the high prices of her goods, she is actually a very charitable individual. She wants to earn enough gold to purchase a heat-insulated limousine to transport the spiders living in the ruins across the Snow Village safely to get them to reach her headquarters in Hotland.

Like Papyrus, Muffet has a distinctive laugh that can be heard while she communicates: Ahuhuhuhu.

So try to think about on what she might sound like in the Game.