Miss Tuffsy was a snail owned by Grandma who went missing before she took in Gary in the episode "Have You Seen This Snail?" and the book Where's Gary?, under the mistaken belief that he was Miss Tuffsy himself.
Biography
It is unknown where Grandma had adopted Miss Tuffsy, though in the episode it's implied that she had Miss Tuffsy sometime before the episode. From what is known, Miss Tuffsy was basically spoiled by going to out to do daily activities such as the ones that Grandma and Gary go out on and being fed a lot of food. At one in point in time, Miss Tuffsy had presumably learned Grandma's dark secret about what she really does to snails and escaped and not much was heard of since the event.
Role in episode
Grandma mistakes Gary for Miss Tuffsy and treats him as if he were her: they go shopping together, go to a beauty salon, listen to music, and watch movies. After Gary realizes she has spoiled and overfed all of her "Miss Tuffsys" to their doom, he escapes her house and goes back to SpongeBob. Grandma follows him and then picks up one of the scary snails that Gary met in the alleyway, mistaking him as well for Miss Tuffsy.
Trivia
- She's the first of Grandma's snails to successfully escaped and survived before Grandma had the chance to eats her like all of the other snails.