Mrs. Puff is a major character in the series. She is a paranoid pufferfish whose occupation is to teach students how to drive at her boating school.
SpongeBob has attended the school ever since its opening, yet has failed his final driving exam countless times, often injuring Mrs. Puff and/or damaging the school and other people in the process.
SpongeBob SquarePants, Mrs. Puff's longest-standing student, is the bane of her existence. His distracting personality, reckless driving, and inability to improve torment her to no end. SpongeBob has failed his driving test countless times, often sending Mrs. Puff to the hospital and often causing immense property damage in the process. On multiple occasions, she has been sent to jail as a result of his actions. To make matters worse, SpongeBob has failed to come to terms with the reality that he cannot learn how to drive properly, largely due to his boundless optimism. Due to this, she and Squidward Tentacles are on very good terms for good or evil since SpongeBob is also Squidward's bane of existence, so she has someone to relate to. However, in comparison to Squidward, she is much kinder to SpongeBob (probably stemming from their teacher/student relationship); for example, while Squidward usually tells SpongeBob face-to-face that he hates him, Mrs. Puff has at least tried to hide her fury. Also, she has even acted nice to SpongeBob on some occasions, like in the episode "Krusty Love," she shows no annoyance or anything negative towards him, except when she screams in horror when she thought they were doing the boating test and the second time, when she is on her second date with Mr. Krabs, he states SpongeBob is helping him tonight and she says a bit slightly worried, "Excuse me, I need to go call my insurance agent."
Mrs. Puff is a white, tan-colored pufferfish with light blue fins for limbs. She has blonde hair and wears a dark blue shirt with a yellow string tie, a dark blue hat, a red skirt, and red shoes. When frightened or shocked, she puffs up into a ball. This is her defining trait that makes her a pufferfish and a reference to the airbags in cars that blow up to protect the passenger when an accident happens. She is very large and plump but not overweight, as her size is a trait of her species.
Creation and development
Her size has changed over the series. In the first 3 seasons of the show, she developed a shape and grew in size. But in seasons 4-present, she has been getting smaller and skinnier. In a more recent appearance, "Patrick-Man!," she is slightly shorter than Patrick but in the first appearance of both together, "New Student Starfish," she is slightly taller.
Mrs. Puff is very paranoid and has had a history of mental instability. In "No Free Rides," it is implied that she has had to move to another town and start a new life with a new name from the past. While this is mostly caused by SpongeBob's antics, she also suffers her pain of losing her husband who is now a reading lamp. She is also shown in New Student Starfish to have a strict Zero Tolerance Policy as she accuses SpongeBob of all Patrick's disruptions and even ignores SpongeBob when he tries to explain anything and even doesn't tolerate fighting. In a deleted scene, she realizes her error and apologizes to SpongeBob.
At the beginning of the series, Mrs. Puff seems to be a little optimistic towards SpongeBob and actually treats him like a good student, save for a few moments when SpongeBob crashes during the course. However, as the series has progressed, Mrs. Puff seems to have developed hatred for him and can even get a fit of mental instability by just looking at him. This could be because of the fact that SpongeBob becomes more troublesome and annoying as the series progresses and has caused Mrs. Puff great trouble. Her thoughts and fears about SpongeBob caused her to think that she was giving SpongeBob a driving test even though they are not at school (or driving). This occasion happened in "Krusty Love."
In the episode "Demolition Doofus," it is shown that Mrs. Puff has finally been driven completely insane by SpongeBob's antics. After losing her ability to puff up, thanks to another failed test by SpongeBob, she becomes incredibly hostile towards SpongeBob. After seeing the many hospitalized competitors of the annual demolition derby, she decides to sign SpongeBob up for it, hoping that he will get literally killed in the derby. However, SpongeBob proves to be very hard to take down, and he even eliminates all the other competitors. At this point, Mrs. Puff enters the derby in a huge truck and tries to kill SpongeBob herself, only to crash into her own boating school and regaining her ability to puff up. It is also her first known time tranquilized.
In "Hall Monitor," SpongeBob causes a lot of damage to Bikini Bottom. However, the police arrest her instead, even though SpongeBob was the one who destroyed the city and not her. (This could be because he is a student driver and Mrs. Puff is the only one with a license.)
In "Mrs. Puff, You're Fired," she is fired because SpongeBob has failed so many times. However, all the other students are able to pass and even when the best instructor is hired, he still can't teach him (however he did come close).
In "Oral Report," SpongeBob steals her boat and causes some damage. However, she is arrested simply for being SpongeBob's instructor, overlooking the fact that she didn't instruct her students to do what he did and the fact that SpongeBob stole her boat and is simply "unteachable."
In "Patrick-Man!," she is helping a driver out of his boat. However, Patrick thought she was stealing it, hence she was arrested for actually helping someone.
Mrs. Puff sometimes even tends to be very anxious and fearful around SpongeBob, since she's been in so many wrecks and accidents with him. Her main goal is to get SpongeBob out of her boating school ASAP, as it has been since her very first appearance ("Boating School" - Season 1). With every episode after the next, Mrs. Puff has grown more hateful or likeful towards SpongeBob. The episode "Demolition Doofus" implied that Mrs. Puff wanted to kill SpongeBob, especially with her shouting out in the episode "WHY ARE YOU STILL ALIVE?!" The episode plot is that she enters SpongeBob in a demolition derby, just to get SpongeBob out of her life in the worst possible way.
Mrs. Puff tends to like Squidward more than SpongeBob due to his good driving skills as opposed to SpongeBob's bad driving skills (it was even shown that she portrayed him in a documentary as a "good boater"). They also share a common dislike of SpongeBob, as he is always getting both of them into trouble for things that sometimes aren't even their fault.
Mrs. Puff is commonly annoyed by Patrick, as shown in "New Student Starfish," when he was being an annoyance, and also wrote an offensive note behind her back (which SpongeBob was blamed for). In "Driven to Tears," he said that she wasn't the boss of him, thus annoying her; however he did show that he knew how to drive, thus leading to SpongeBob's jealous side taking control of himself. In "Doing Time," SpongeBob brings Patrick along to help break Mrs. Puff out of jail and she asks "Why'd you bring him?" sounding a little annoyed. Also, in "Patrick-Man!," Patrick accuses her of stealing a boat; however, she is actually trying to help someone to get out. However, she is falsely accused and sent to prison for it. Patrick also uses a possible pick-up line on Mrs. Puff in "Party Pooper Pants," though she appeared confused about it.
In some episodes, Mrs. Puff and Mr. Krabs tend to argue ("Growth Spout," "Summer Job"), but in "Krusty Love," it was shown that they were in a relationship. This could be due to the fact that "Krusty Love" took place after "Growth Spout," and "Summer Job," (in which they didn't get along). It is also possible that they broke up and didn't like each other at all anymore. This was also one of the few occasions a relationship didn't end by the time the episode ended. It is shown they still show little affection for each other. In "Whirly Brains" it is shown that Mr. Krabs and Mrs. Puff have been dating secretly.
Mrs. Puff is one of few characters that actually wanted SpongeBob dead and actually tried to get rid of him herself as stated in "Demolition Doofus." Other characters are the Tattletale Strangler in "SpongeBob Meets the Strangler," where he tries to strangle SpongeBob for being a tattletale, and Squidward in "The Lost Mattress," where he actually threatened to murder SpongeBob.
Mrs. Puff has the largest criminal record for a recurring/main character in the show.
Mr. Puff, her husband, was confirmed to be deceased in "Krusty Love" when Mr. Krabs asked "What happened to Mr. Puff?" then it shows he had been turned into a novelty lamp. SpongeBob says "She doesn't like to talk about it."
In Season 1, whenever Mrs. Puff inflated, she has a deep voice. However, since season 2, her voice didn't change when she inflated.