Possible: Lincoln tries to get to the T.V. and shouts to Leni. She thinks there's a spider on her, and frantically rubs her head trying to get it off. Then Lincoln says there's actually a zit on the end of her nose. She runs off thinking she's a hideous monster.
When the lights go out, Leni thinks she has gone blind.
She thinks someone is touching her hand when she is actually touching her own hand.
When the lights are back on, she still thinks she's blind because her eyes are closed, but Lisa told her to open her eyes and she thinks it's a miracle.
When Lori tells her to make her bed because she needs a ride to the mall, she thought Lori meant it literally, and constructs a bed.
She failed her driving test 12 times, one of her failures included crashing Vanzilla into a tree, and setting a fire hydrant to spring a leak, with a nun screaming at the top of her lungs in a panic, and a paper boy hanging by a branch.
When she goes to the DMV to take her driving test, she goes the wrong way.
She fails her test again because she believes that everything she did on Lincoln's video game was realistic.
She does not know how to drive a lawnmower, and drives through the hedges.
She has no knowledge about car parts or their location.
She tries to turn off the lamp with her sleeping mask on, as well as thinking she got it when Lori says "Click."
While listing off all the places Leni could have driven her siblings to, she mentions the mall twice.
When Lori confessed she sabotaged Leni's driving test, Leni didn't seem to know about the word sabotage, and mispronounced the word as "sa-vo-taj".
After Lori says she'll make it up to Leni, she asks if she'll buy her the dress, after Lincoln explained the word "sabotaged" by using a hypothetical scenario with a dress.
She accidentally drives Vanzilla into a swimming pool, thinking it's the carpool lane.
She wastes water by running it and not even using it.
When Lincoln tells her to use a moist towelette to clean herself, she tells him she's showering and closes the curtain on herself even though she's fully dressed. Lincoln does this at the end of the episode as well although he probably means it as a joke.
When Lincoln takes the TV away, Leni picks up the remote and thinks their neighborhood is on TV.
When Lincoln takes the fridge away, Leni comes in to get a drink of water and ends up getting nothing but air. She even demands a refill when she and the other girls get their stuff back.
When Lincoln asks for help after Lana hogtied him, Leni comes back for him, apologizes, and carries him like a handbag instead of untying him.
Luna tells Leni to sing backup, and she sings the actual word "backup" as opposed to the actual lyrics. Then Luna tells her she has to sing what's on the page, to which she responds by literally singing "what's on the page."
During the family's performance, Leni walks backwards, claiming she is a "backup" dancer and falls off the stage.
After Lincoln and the girls trap Luan in a crate, they make fun of her with crate-related puns. Leni made a joke saying, "You're in a crate!" and laughs at that, while the others just stare at her confused. Lincoln says that they should all go to bed.
When the other girls are hiding from Luan's pranks and run out of food thanks to Lana eating it all, they suggest to draw straws. Leni just concedes to going and sacrificing herself because she claims to be a terrible artist, meaning she would make a terrible drawing of a straw.
While Lincoln avoided Luan's kitchen direction arrows, Leni follows them to an undisclosed location, and thanks each and every one of them.
When Lori needs a plan to get Bobby back from Lincoln, Leni suggests that she hang out with Ronnie Anne because she thinks Ronnie Anne would be like the sister Lori never had. Lori already has nine sisters by the way Leni meant it. It wouldn't be so dumb if she meant it the other way around though by saying that Lori would be like the sister Ronnie Anne never had.
Her male counterpart, Loni, runs into the wall, thinking someone moved the doorway.
When the boys dogpile on the alternate universe's version of their dad and tell him to say "uncle," Loni says it's their dad.
Both Leni and Loni are easily fooled by Lincoln's lie that he is referring to nuns when he mentions sisters.
Possible: In the dimension where the brothers have a sister named Linka, when "Lincoln" is confused that the brothers are suddenly nice despite being bullies earlier in the episodes, Loni assumes that Linka wants him and the rest of the brothers to stay in her room until she falls asleep.
When everybody is complaining that Lola knows their secrets, Lynn thinks there's a rat (slang term for a snitch) in the group. Leni thinks Lynn was referring to a real rat, as she jumps in fear and asks where it is before Lisa corrects her by giving her the correct meaning.
When Lincoln realizes Lola was the true rat, he tells his sisters that her name rhymes with "granola." Leni presumes that Lisa was the rat.
When Leni checks Lincoln's temperature to make sure he isn't sick, she wrongly says that Lincoln's temperature is 986 °F. She meant to say 98.6 °F (37 °C), the normal human body temperature.
While firing chicken noodle soup at the sick siblings, Lincoln warns Leni that Lori is at 9:00 (behind her). Leni tells him to make up his mind, asking what time it is, not knowing the contagious Lori is behind her.
When Lincoln says that she's starting to act like Mother Teresa, her rebuttal is that their mother's name is Rita, not Teresa.
She gets picky about the protective masks she could wear, even though the sick siblings are behind her.
When Lincoln tells Leni to duck after Luna sneezes, she thinks there's a real duck and asks if it's sick.
Possible: When Lincoln asks for the table, Leni wonders if he plans on making his sick sisters a meal, even though Clyde is already doing that.
However, since Lincoln was the only one communicating with Clyde, it is possible that she was unaware that Clyde was making a meal.
When Leni came downstairs wearing her new dress, she thought Lori holding her dress (which was the same one Leni bought) was a brand new mirror that was installed.
When Lincoln asks Lori and Leni how they resolved their fight over the dress, Leni says that Lori gets to wear it on any day of the week that ended with "Y", and she gets to wear it the rest of the time. In other words, Lori gets to wear it every day of the week (since the days of the week all end with "Y"), while Leni will never have a day to wear it.
Leni says her life's work is a six-piece children's puzzle.
When Lynn teaches Leni and Lola to fight a dummy just in case if a burglar broke in, Leni flirted with the dummy instead of attacking, claiming it looked cute. When Lola attacked it; however, Leni chastised Lola for attacking it, thinking "he" liked her.
When the Loud kids were cheering when Lincoln informed them that the burglar was caught, Leni still had feelings towards the dummy (which she named Donnie), and says that she and "Donnie" should've ran away to Mexico while they had the chance.
Leni claims she has a deadly spray to use against the burglar called "Fatal Encounter." However, Lori points out she's just holding a perfume sample.
Lincoln tells Leni that he doesn't want to go her charity fashion show out of fear that his "bad luck" could make her trip, jam a zipper, or break a heel. Later, when Lana offers Lincoln to come to her alligator wrestling match, Leni intervenes, and tells Lana to reconsider inviting Lincoln, giving the same exact reasons Lincoln told her earlier (trip, jam a zipper, or break a heel).
Possible: When Lincoln can't come to the movies with the family because of his "bad luck", Leni says she'll tell him how the movie ends, which is a spoiler.
When Leni asks Clyde if he wants a partner to play with on the seesaw, Clyde denies the offer, saying that he has Lincoln (which is actually a rock with Lincoln's face painted on it). Leni, not noticing that it's not the real Lincoln, says hi to "him". Later, when the twins attacked Clyde for ruining their sandcastle, Leni, needing to go to the bathroom, asked "Lincoln" to watch the twins while she's gone.
Possible: She gave Lynn Sr. a 10 just for using skates to cut up hot dogs as if he was actually in a figure skating competition.
She hides the ingredients for Lynn Sr.'s goulash in his slippers and robe, leading to the parents discovering the kids sabotaging the meal.
When deciding on what dish to make for their parents, Leni suggests they make goulash. When Lincoln tells her that goulash is one of the dishes their father cooks weekly, and want to avoid it, which is why they're doing this, Leni claims that she misses it.
Leni asked Lori if the dress she's wearing (which is her usual dress) clashes with the color of her toenails. When Lori says it's fine, she heads back into her closet, and a few moments later, she asks the same question while wearing the same dress.
Leni says that Lori's lucky that she gets her own room, despite having her own room now (because of Lori's absence).
When Lana came into her room to tell her that she had a bad dream, Leni asks Lana what the dream was about. When Lana said that blood-sucking aliens were approaching her, Leni panicked, and started barricading her door with her dresser, believing that the blood-sucking aliens were real.
When Lori faked the garage being infested with mice, Lisa used her latest invention to hypnotize the mice, saying that they're easily fooled because of their miniscule brains. Leni, however, falls victim to the machine, due to her low intelligence.
She thinks there are only forty states in America, instead of fifty. (Mr. Grouse also doesn't know the correct number of states, as he said there are 48 states. He may just be counting the Contiguous United States, hence excluding Alaska and Hawaii.)
She has difficulty passing the letter P in the alphabet.
When Rita and Lynn Sr. wanted Lori and Leni to take SAT prep classes, since it's the best way to get into a good college, Leni remarks "What about just using the front door?"
Because of that remark, Rita suggests they book Leni up for the double session, which could mean she needs twice as much education than Lori, due to her lack of intelligence.
While taking photos of Lori, Luan, and Lucy, Leni took a photo of them while Lori wasn't ready yet, due to her telling Luan that she was doing her duck face wrong.
When the Loud family was picking up trash on the interstate, Leni is unaware that her garbage bag has a hole in it, causing whatever trash she puts in to fall out, prompting her to put it back in, with similar results.
When Lori and Leni arrived home after taking their SAT prep classes, Leni, along with Lori, stated that their verbal scores went up 200, and Leni says her verbal score is now 200, meaning that her verbal score was originally 0 (which means she was completely illiterate beforehand).
This could explain why Leni wasn't able to say her own surname in "Suite and Sour," since she was reading it in a card.
Just like "Along Came a Sister", she thinks Luan's fake spider is real.
When Lynn was gloating "Lynn-er, Lynn-er, chicken dinner!", Leni responds with "I thought we were having salmon."
After Lynn smacked Leni into the wall, when "racing" her up the stairs, Lynn says "You went down hard!", and Leni responds with "I thought I was going up," while also walking into the direction of the wall.
Leni ruins the Louds' plan to throw the game, so Lynn could win by literally throwing the game board out of the window.
At the beginning of the episode, it was established that flushing the toilet would raise the water temperature in the shower. Leni, however, forgot about that, and unknowingly scalded Luna during the latter's shower.
Lincoln tells the siblings that Luan heard everything they said and she's giving up comedy. Leni thinks that Luan's show at the Chortle Portal will be really bad.
Leni does a spit take whenever someone talks, even if it's not a joke.
In Lori's flashback of Carol winning the golf tournament, she cheered for Lori for having the highest score, when lower scores are better in golf.
Possible: She asked Lori for her phone back so she could like Carol's picture.
When Lori says that cute, lovable animals are her middle name, Leni misunderstands the turn of phrase and says that she thought Lori's middle name was Marie.
On top of this, there's reason to suspect that Leni got Lori's middle name wrong entirely. In "Driving Miss Hazy," the middle name on Lori's license starts with L. However, it's possible that this is a retcon.
She thinks Lori is referring to the corgi when Lori says "That rat!".
Possible: She didn't understand why the main characters of Vampires of Melancholia have pointy teeth.
Possible: Right after Lori says that hanging upside down is giving her a migraine, Leni says that it's giving her a headache.
She could be referring to a headache weaker than Lori's.
She also says that sitting in a coffin is also hard on your back, after Lori says that coffins provide zero lumbar support (the lumbar is the lower area on your back), however this is also debatable because Leni might've hurt on a higher part of her back.
Her idea of a vampire themed snack is garlic bread, even though vampires hate garlic.
She thinks that one of the mannequins is talking to her when it was Miguel.
When Leni's work friends asked her if she double-booked, she said that made two separate plans on the same day, not realizing that that is exactly what double-booking means.
When Lincoln tells Leni how he got all of his friends together, Leni misinterprets his advice and thinks that he means her friends should meet his friends.
After Lincoln and Lori tell her that her friends have to learn to share her and to "march back to the store and tell them to grow up," she tells her friends "if you can't learn to share the store, then you have to march back to the room and grow me up!", later regretting not practicing on the bus.
When Lori tells Leni, assuming that she was the one using the bathroom, to hurry, Leni, instead of informing her that she was on the stairs, states that their mother told them to not to run on the stairs.
Leni doesn't know the "backpack" Lori gave her was a leash, even though the rope was clearly visible.
When Luna says that she and Sam have "nada" in common, Leni claims that at least they have "nada," only for Lori to tell her that "nada" means "nothing."
When an irresponsible teen is looking for work after he left the sunroof on his parent's car open during a rainstorm, she approves of him working at the restaurant, saying that she finds him "relatable."
She unknowingly opens the front door on Lincoln.
She unknowingly opens the kitchen door on Lynn Sr., and when she sees his unconscious body, she thinks he's asleep, asking "Why is he napping during the gland opening?".
When she offers two people a booth, she says, "Please take a seat, but give it back at the end of your meal."
When Lynn Sr. decides to name some of the dishes after the kids, the kids list off dishes with their names in it; but, Leni comes up with "hamburgers" as her suggestion.
When the family starts to reminisce on past memories after giving Lynn Sr. their scrapbook, Leni comments that they'll never forget the time they made that scrapbook, despite doing that very thing that very morning.
Possible: In order to distract him, Leni offers Lincoln to take him to Gus' Games 'n' Grub by claiming to have found money in her purse, which was actually just buttons, bottle caps, and washers. When Lincoln asks her if it is money, she says "Yes".
However, when she said "Yes", she didn't sounded completly sure, implying that she was at least unsure that she had money in her purse.
Additionally, when Lincoln asked Leni if she was sure that what she had in her purse was money, he says that "[they have] talked about this", meaning the Leni has mistaken objects for money before.
She tries to talk her problems out with Mr. Coconuts, but leaves when she believes he's giving her the silent treatment, despite Mr. Coconuts being an inanimate object.
Leni tells Lily that she's been close to Lori since before she was born.
She calls the golf uniforms ugly, despite the fact that Lori is already wearing that uniform.
She thought the golf course's water hazard was a swimming pool.
When she states the outlandishness of Lori having to share a bathroom with nine other people, Lori tells her it's no different from their own home, where she has to share the bathroom with twelve other people.
She tries to get Lori in trouble only for it to backfires.
She keeps calling Coach Niblick "Nibbles".
Possible: When Coach Niblick is on the phone, Leni cuts the cord rather than putting the phone back onto its receiver.
When everyone is off topic, Lincoln tries to get them back on track by picking up where they were in their talk, Leni tells him they're in his room.
When Lisa says she wants to talk about genome mapping, Leni thinks she means their pet Geo.
And when Lisa corrects Leni, Leni wonders when they renamed him.
She accidentally told her siblings a secret involving her stepping on Lincoln's model spaceship, and tossing the pieces in Mr. Grouse's garbage can so he would never find it. When Lincoln questions if she actually did that, Leni is quick to chastising Lola for blurting it out (since her episode involves gossiping), despite Lisa telling her that she just told everyone herself.
Later, when the siblings refuse to let Lola continue with her podcast, Leni tries to say the spaceship incident was her (Lola's) fault, where, once again, Lisa corrects her by saying that she did that.
According to Lola, Leni once brought a bar of soap to a meteor shower.
She did not know that the red light meant the microphone was on.
She spent $70 on a new outfit even though the podcast was strictly auditory.
She wanted to start at the nail salon, but later she figured the listeners didn't want to hear about it.
When Leni and Lincoln went to the pet store, she only commented that their family buys food and toys for Lana, causing Lincoln to remind her that the family also buys things for their pets in the store.
She thought 50% off and half off were two different things.
She commented on the department store being called the anchor store, even though she never saw an anchor in it.
When Lincoln said "You're the best, Leni!", Leni thought he meant she was the best among other Lenis, (who she didn't know).
Possible: She accidentally laid her eyes on a puppy at the pet store, prompting her to adopt it.
According to Lynn Sr., Leni frequently tries to dry her hair with the microwave.
When Lana asks about the most important member in the family, Leni's answer is "Mr. Grouse."
She answers him again after Lana asked her about going to the mall.
She confessed to scratching the van even though Lana didn't even know who did that.
She thought that compact spaces are for people with makeup compacts, not compact cars.
When she sees how good toothpaste is at getting scratches out of the van, she wonders what it could do for her under eye circles and squirts it in her eyes, resulting in serious stinging.
She calls Lana's air compressor a "blow dryer thingy" and uses it to dry her hair.