SpongeBob SquarePants has attended her 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, 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 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, Mrs. Puff is much kinder to SpongeBob; 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, though these moments tend not to last very long.
Mrs. Puff is a white, tan 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 the defining trait that makes her a pufferfish. 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 three 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 "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 a history of mental instability. In "No Free Rides," it is implied that she 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 to have a strict Zero-Tolerance Policy in "New Student Starfish," 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.
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 progressed, Mrs. Puff seemed to have developed an intense hatred for him and can even get a bit of mental instability by just looking at him. In "Krusty Love," her thoughts and fears about SpongeBob cause her to think that she was giving SpongeBob a driving test even though they are not at school or driving.
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 him. After seeing the many hospitalized competitors of the annual demolition derby, she decides to sign SpongeBob up for it, hoping that he will get 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 murder SpongeBob herself, only to crash into her own boating school and regain 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.
In "Mrs. Puff, You're Fired," she is fired because SpongeBob has failed his boating test far too 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.
In "Oral Report," SpongeBob steals her boatmobile 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 tries to help a driver out of his boat. However, Patrick accuses of her stealing it, prompting her arrest.
Mr. Puff (husband)
Mrs. Puff is revealed to have had a husband in the episode "Krusty Love." However, he passed away and was turned into a lamp at a gift shop. She has since had trouble recovering from this tragedy with SpongeBob stating that she does not like to talk about it.
Mrs. Puff sometimes tends to be very anxious and fearful around SpongeBob, since she's been in many wrecks and accidents with him. Her main goal is to get SpongeBob out of her boating school as soon as possible, as it has been since her first appearance in "Boating School."
With every episode after the next, Mrs. Puff has grown more hateful or friendly towards SpongeBob. The episode "Demolition Doofus" shows that Mrs. Puff wants to murder SpongeBob, especially with her questioning his very existence.
Mrs. Puff tends to care for Squidward more than SpongeBob due to having good driving skills as opposed to SpongeBob. It is 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. In "Driven to Tears," he says that she isn't the boss of him, thus annoying her. However, he does show that he knows 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 bit annoyed. Also, in "Patrick-Man!," Patrick accuses her of stealing a boat, even though she is actually trying to help someone to escape from it. However, she is falsely accused and sent to prison for it.
In "Krusty Love," Mr. Krabs and Mrs. Puff enter a relationship. This is also one of the few occasions a relationship didn't end by the time the episode ended. In "Whirly Brains," it is shown that Mr. Krabs and Mrs. Puff have been dating secretly for 16 years.
Despite being in a relationship, Mr. Krabs invades Mrs. Puff's property at night to obtain food for his daughter Pearl; Mrs. Puff notices him in the act and becomes armed with a crowbar, threatening to report him to the police. They also get into an argument in "Summer Job."
Mrs. Puff and Plankton have had very few interactions. They interact in the episode "Teacher's Pests" when Plankton has to go to her boating school. She doesn't seem to mind him, except him and Mr. Krabs kept arguing and annoying her.
Mrs. Puff has nearly died almost every time SpongeBob takes a driving test with her, from "Boating School" to "Bumper to Bumper."
Mrs. Puff is often accused of SpongeBob's reckless driving and havoc wreak, with the authorities believing that she fails to educate him, and usually gets arrested in each instance. A majority of her criminal history is for falsely accused crimes and rarely has she ever intentionally broken the law.
Attempted murder by proxy/Attempted murder: In "Demolition Doofus," she enters SpongeBob in a dangerous demolition derby to get him killed. Afany more racers fail to murder him, Mrs. Puff enters the derby herself to get SpongeBob killed with her giant monster truck. Despite committing a malicious act, she is not arrested for this incident.
Civil disobedience/Rioting: In "The Sponge Who Could Fly," Mrs. Puff is among the many citizens rioting against SpongeBob for refusing to do anymore favors.
Destruction of government property: In "Doing Time," she accidentally crashes into a police car.
Ditching jury duty: In "Ditchin'," she is arrested in the end for missing jury duty.
Illegal entry: In "Bumper to Bumper," Mrs. Puff accidentally crosses the county line and is thus arrested.
Littering: In "Summer Job," she rips SpongeBob's note on the Krusty Krab property, which she is sentenced to 4 and a half years in prison for doing.
Motor vehicle theft: In "No Free Rides," Mrs. Puff hijacks a boatmobile that belongs to SpongeBob, causing the latter serious injuries as he tries to control the vehicle. In "Patrick-Man!," Patrick frames Mrs. Puff for stealing a boat when she was trying to free a student trapped in it. The authorities believe him and thereby arrest Mrs. Puff.
Threat: Despite being an authority figure, she threatens to kick SpongeBob's butt at the end of "The Bully," believing that SpongeBob punched Flats the Flounder when in reality he passed out from exhaustion after punching SpongeBob.
Vandalism (falsely accused): She is blamed for SpongeBob's destruction of Bikini Bottom in "Hall Monitor," which leads to her arrest.
Worker rights violation: Mrs. Puff violates her rights as a teacher in "The Bully" by posing a life-threatening injury to SpongeBob. Also, in "Ditchin'," she fails to assure SpongeBob's return to class. However, this instance will also be held on SpongeBob's criminal record since it was his fault for ditching class.