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She seems to dislike Mr. Krabs when he is acting cheap towards her. She is almost the complete opposite of her father when concerning money. She has spent great amounts of Mr. Krabs' money in the past on superfluous things, and has admitted to maxing out his credit cards trying to buy shoes.
Despite her cheap father, she acts very bratty and spoiled often trying to control her father into getting her whatever she wants. She also cries whenever something goes wrong or she doesn't get what she wants. The irony is that usually children act like this when their parents spoil them which Krabs does the exact opposite of.
In "Selling Out," Pearl can be seen as a baby in a scrapbook. Mr. Krabs was holding her in the picture: It's possible he could have possibly taken it. In another photo, she can be seen riding a bike with the guidance of Mr. Krabs.
Pearl is seen wearing a short pink cheerleader dress, with a P stitched into it which stands for Pearl. She also sports short, white, heeled boots. She has smooth gray skin and is huge. When she cries everyone covers themselves. She has a red heart lipstick on her nose that turns into lips when she kisses, and she has blonde hair pulled into a ponytail with a pink clip. She has blue eyes and three eyelashes on each eye.
In the past, Pearl seemed to like him so much due to "The Chaperone," their relationship grew stronger, however in "The Slumber Party," she showed a strong dislike for SpongeBob, it is unknown why, but Pearl seemed to be annoyed now by his actions. However, in some episodes, they had a like/hate relationship, Some fans think this is love between SpongeBob and Pearl, but that's highly unlikely since Pearl is only 16. However, age is debatable due to multiple mentions of her birthday during the show.
Pearl and Sandy never interacted to each other officially but the only time seen so far was in Bubble Troubles when Pearl helped Sandy by giving air to her air helmet and said that mammals need to stick together. And at the start of the episode "Mr. Krabs Takes a Vacation" though it was just a brief cameo, Sandy was seen sitting directly in front of Pearl while Mr. Krabs was getting everyone (except Squidward) excited about the story of the vacation trip.
Fans think they are rival love interests of SpongeBob. In "Texas," she was one of the townspeople who wanted Sandy to stay in Bikini Bottom. She and the rest cheering for Sandy that she decides to stay in Bikini Bottom. They are most likely only friends.
Mr. Krabs is Pearl's father. Almost every episode Pearl appears in, Mr. Krabs is in too. Pearl loves her father very much but gets angry when he is cheap. Mr. Krabs loves Pearl very much too. It is possible that she is adopted or that Mr Krabs' wife was a whale.
Squidward and Pearl have an awkward relationship. In The Chaperone, Pearl refuses to go out with him to her prom. And in Welcome to the Bikini Bottom Triangle, he called her a 'drama queen', they were sunbathing while SpongeBob's Patty meter was empty. Pearl thinks that Squidward is such a "barnacle".
Friends in Bikini Bottom High
Pearl and her friends were best friends, in "The Chaperone," they didn't laugh at Pearl that SpongeBob is her prom date, then in Tunnel of Glove, they teased and humiliated Pearl that SpongeBob is her boyfriend, then they told the whole TV broadcast that Pearl and SpongeBob are dating. Then at "Drive Thru," Pearl had new friends. It is possible she got new friends because her old friends made fun of her.
Although Pearl has been seen with her father many times throughout the series, Pearl has never been seen onscreen with her grandmother, Betsy Krabs.
"Oh, actually it was really funny when that hot dog landed in Judy's hair!" (The Chaperone)
"SpongeBob! What are you doing?!" (The Chaperone)
"Totally rude, SpongeBob!" (Bossy Boots)
"Back off, pizza topping! Can't you see I'm doing The Sponge?!" (The Chaperone)
"I know it's you, SpongeBob SquarePants! Get him, girls!" (The Slumber Party)
"But I am having a good time..." (The Chaperone)
"Yay! My first prom picture!" (The Chaperone)
"Come on, SpongeBob." (The Chaperone)
"Yes, you can still wear the wig..." (The Chaperone)
"Daddy! I'm borrowing your wallet! Line dancing? Ewww, that is so lame. What they need is my way cool cheer routine." (Tentacle-Vision)
Pearl and Sandy are the only major characters who are mammals.
Currently, she has only appeared in one episode ("Tunnel of Glove") without Mr. Krabs.
She becomes more spoiled and rude in later episodes, possibly due to the cheapness of her father. In the episode "Selling Out," she was extremely rude to Mr. Krabs for wanting to spend time with her even though he did nothing wrong. In Welcome to the Bikini Bottom Triangle, she demands to go to the mall, even though she should be concerned that she's trapped in a deserted island.
Since Pearl is a whale, and mammals have lungs, she needs air to breathe. It is revealed in "Bubble Troubles" that she holds air in her nose in order to breathe when underwater.
Pearl and Sluggo are the only characters to be a different species to their parents.
Stephen Hillenburg is against revealing who Pearl's mother is so has kept it a secret throughout the series.
On the Krabs family tree, it is revealed that Pearl is an only child.