This page describes Leni Loud's relationships with her family and friends.
Her siblings generally
Her younger siblings see her as a very sweet and kind-hearted older sister, contrasting Lori, but her ignorance and clumsiness can sometimes cause harm, or irritation for them, as much as they know she doesn't mean for it. When her siblings are in need of assistance, she will always come to their aid, without letting her ignorance get in the way. All-in-all, they love her very much, and take very good care of her.
In "Job Insecurity", it is shown that she trusts her siblings, to the point where she believes that they won't take her food when she's not around.
In "No Spoilers", they decide not to tell her about their Mom's upcoming party, so the sisters hired Lincoln to distract her. However, without her, they messed up with the decorating.
Leni and Lincoln get along very well. Most of their interactions are generally positive, despite Lincoln getting annoyed with her absent-mindedness from time to time. Along with Luna, she has the best relationship with Lincoln of his older sisters.
It's noteworthy to point out that Leni has been shown to be very accepting of Lincoln's odd white hair, as seen in "Chore and Peace", when she said it makes him look like their grandfather, Pop-Pop, and in "Ties That Bind", where she defends it when their parents seemingly decided to "get rid of" him.
In "Driving Miss Hazy", he helped her to pass her driving test, by using her semi-language. He also convinced her to not give up trying.
In "Linc or Swim", she was always the first one to invite him to spend time with his other sisters. First, to "chill" with them next to the open fridge, second, in to the "Paradise for One" pool he had set up, (this shows how nice Leni really is compared to the others, unconditionally offering him to get in to the pool with her and Lori) and third into a newly purchased pool, even though he kicked them out of his.
In "Along Came a Sister", Lincoln brought his class's pet tarantula home for the weekend and Leni attempted to kill it, due to her fear of spiders. However, after she learned Lincoln will get into trouble if he let his class' pet die, she protected it to save her brother's status quo, showing how much she loves her brother.
In "House Music", the siblings decided to form a band, and while all the sisters left Lincoln hogtied to the floor, thanks to Lana. Leni was the only one who returned for Lincoln, apologized to him, and she carried him like a handbag, much to his annoyance.
In "Roughin' It", it was revealed that sometimes Lincoln and Leni sew clothes together, and she taught him how to keep warm.
In "One Flu Over the Loud House", Lincoln sacrifices himself to protect Leni from becoming infected with the zombie flu. When she asked why he did it, he tells her that it's because she has a good heart, and she deserved to be saved more than him, before he sneezed on her.
In "No Such Luck", Leni wants to invite Lincoln to her activity, but Lynn interferes, and tells Leni not to bring Lincoln, since he's "bad luck". This causes Lincoln to get an idea, and convinces Leni that his presence might cause something to go wrong, and Leni immediately believes him.
In "Change of Heart", she happily agreed to help Clyde try to act normal around Lori, when Lincoln asked if she would help him.
In "No Spoilers", Lincoln is hired to distract Leni in order to keep her from finding out about their mother's surprise party.
In "Not a Loud", Lincoln questions Leni about his birth.
Although Leni and Lori differ from one another in both kindness and intelligence, they are actually very close with each other and they have the same bedroom. They are both enthusiastic about fashion, taking selfies, and talking about boys. Despite this, Lori will often try to control Leni and boss her around. At times, it seems as though Lori takes advantage of Leni's ignorance and naivety, and makes her complete tasks that she should have done herself.
In "Driving Miss Hazy", Lori didn't want Leni to pass her driving test, because then her siblings would ask Leni to drive them places instead of her. Therefore, she would no longer be able to get them to do favors for her. She sabotaged Leni's driving test, but later, she felt extremely guilty for her thoughtless actions and wanted to fix her mistake by helping her prepare for her next test.
In "Picture Perfect", Lincoln walks upstairs to see Leni and Lori taking selfies with each other and laughing.
In "Undie Pressure", she and Lori polish each other's nails.
In "It's a Loud, Loud, Loud, Loud, House", they both teamed up to search for hidden money in their house. They were seen dancing together at the end once the money was found.
In "Brawl in the Family", the two had a very heated fight over buying the same dress, which lead to a lot of friction in the house, and eventually with the other siblings.
In "Back in Black", Leni blames Lori for taking her dress.
In "Vantastic Voyage", they both go over to a car dealership to take use a car to their advantage, and they both manipulate Steve to do so.
In "Party Down", Leni is the only sibling that Lori didn't kick out of her sophisticated party because she acted as Lori wanted.
In "Potty Mouth", Leni and Lori fight over a sweater, which causes them to swear in front of Lily.
In "Garage Banned", it is shown that she sometimes asks Lori for fashion advice.
In "No Spoilers", she ruins Lori's surprise party.
The two of them don't interact with each other much, but in "Along Came a Sister", it is shown that she does enjoy listening to her music, and dances while she and Lily used pots and pans as drums, although it was actually a diversion to keep Leni from noticing Frances.
In "The Sweet Spot", Leni flips off Luna when she wants the best seat in the van.
In "House Music", Luna lets Leni sing backup, but the latter is unable to, due to not understanding her role.
In "Come Sale Away", Luna corrects Leni, because she thought that a welcome mat was Lily's blanket.
In "L is For Love", Leni was the first to ask Luna why she wasn't cheering over the fact that she was still in the running of the secret admirer mystery.
In "No Spoilers', the last flashback showed Leni asking Luna which dress she should wear to Luna's surprise party, unknowingly blowing the surprise.
Luan gets easily annoyed by Leni's absent mindedness, as much as the latter gets annoyed by the former's bad jokes. Luan often scares Leni with her plastic spider. Despite this, she and Luan have a good relationship, and they can be seen having fun in some episodes.
In "Linc or Swim", Leni doesn't know the rules of the game "Marco Polo", much to Luan's annoyance and/or dismay.
In "Cover Girls", Luan dresses up as Leni at one point, and they even copy each other's movement.
In "Raw Deal", they were playing together in the lake.
In "Funny Business", Luan revealed she asked Leni to be her her clown assistant, but she failed due to her ditziness.
In "Brawl in the Family", Luan believes that Leni has the right to be mad at Lori.
In "Room With a Feud", Leni and Luan become roommates, they seem to get along at first with Leni laughing at Luan's jokes, but eventually gets annoyed when Leni laughs at every little thing she says.
In "No Laughing Matter", Leni stated Luan has been "so annoying" with her pranks during the sibling meeting. Then, when her siblings state how weird it is that Luan suddenly became serious, she's the only one who had some concern for her and wanted to see if she was okay. At the end of the episode, she congratulated Luan on being the winner of the contest and hugs her.
They don't have many interactions, but they do get along with each other.
In "No Such Luck", Lynn prevents Leni from being affected by Lincoln's "bad luck".
In "Room With a Feud", Leni and Lynn become roommates, which baffles the both of them due to their lack of common interests. They don't agree to share a room, but they get along well, as Lynn uses Leni as a weight lift, while the latter decorates the ceiling.
They don't have any interactions but, like their siblings, Leni gets frightened by Lucy's sudden appearance while the latter gets annoyed by the former's absentmindedness.
In "Linc or Swim", when Leni miscalculated the siblings to 10, Lucy corrected her by saying that they are 11.
In "A Novel Idea", Lucy and Leni both enjoyed ziplining.
In "Spell It Out", Leni says she's sorry to Lucy by playing a game of Tic-Tac-Toe.
In "Tricked!", Leni said she's happy their mom let Lucy organize the house for Halloween as she sees fit.
They don't have much interaction, but they get along really well.
In "Come Sale Away", Leni said that Lana couldn't sell a dress if it was 50% off, not even if it was half off.
In "Cover Girls", Lana and Leni dress up as each other.
In "No Such Luck", Leni prevents Lana from being effected by "Lincoln's bad luck".
In "Kick the Bucket List", Leni takes care of her and Lola.
In "Garage Banned", after Lori moves out into the garage, Lana comes to Leni for comfort after a nightmare she had. Leni takes her nightmare literally and blocks the door to protect the two of them.
While the two don't have much interaction, they are shown to get along as sisters. Lola tends to get annoyed when Leni acts dumb, and Leni gets scared of getting on Lola's bad side, as Lola once gave her stuff away for free after she accidentally sat on Lola's crown (although this was shown to be a made up story). As the most feminine sisters, they enjoy fashion and in "Homespun", the two were shown to enjoy dressing up in traditional ball gowns during the time of the Wild West, with Leni helping her dress up.
In "Back in Black", Lola accuses Leni of stealing her perfume after noticing that it's gone.
In "Kick the Bucket List", Leni takes care of her and Lana.
In "Future Tense", Lola and Leni work together to get people to vote.
In "No Laughing Matter", Leni paints Lola's nails.
Lisa often uses Leni as a test subject to prove her experiments and inventions. The reason of this is because of Leni's poor intelligence. This is evidenced in various episodes like in "Project Loud House", when Lisa changed Leni's blemish cream for an experimental skin pigmentation ointment, turning her skin blue.
In "No Spoilers", she sends Lisa an invitation to her own surprise birthday party.
Given their completely different IQ levels, Leni's absentmindedness tends to get on Lisa's nerves at times.
She and Leni have a great relationship. After their sister, Luna, Leni seems to spend most of the time with Lily out of all their other siblings.
In "Changing the Baby", Leni tries to implement her interests on Lily, because she had nobody that shares her likes.
In "One Flu Over the Loud House", Leni prevents Lincoln from firing chicken soup at Lily, who was sick.
In "Back in Black", she plays with Lily.
In "Potty Mouth", Leni accidentally swears in front of Lily.
In "The Crying Dame", Leni tries to cheer up Lily when she is sad.
In "Future Tense", her parents force her and Lori to take SAT prep classes.
In "Attention Deficit", she helps Leni to apply makeup, without making herself look like a clown.
In "No Spoilers", when the surprise party that her siblings organized for their mom turned out bad, Leni stepped in and made it much better.
In "Fed Up", Leni helps him with dinner, and says she has the perfect outfit for the dish they made for dinner.
In "Job Insecurity", it is revealed that Leni wants to get her belly button pierced, but her father forbids it.
In "Health Kicked", Leni helps her dad "exercise" by folding t-shirts.
In "No Spoilers", Leni accidentally spoils a surprise party for Lynn Sr.
Clyde and Leni's relationship seems to be pretty good. In the episode "Overnight Success", she asks for his help on a new facial cream she needs to test on before trying it. She also seems to enjoy his company at the sleepover.
In "Along Came a Sister", Clyde recalls one time on Halloween when Leni mistook his spider costume for a real spider, and sprayed him with bug spray. Of course, this was just her arachnophobia getting the better of her.
In "The Whole Picture", she cools Clyde down with a fan when he passes out from seeing Lori and tells Lisa not to say Lori's name so loud.
In "Kick the Bucket List", Leni offers to ride on the teeter-totter with Clyde, but he declines, as he wants to do it with Lincoln by drawing him on a rock.
In "Change of Heart", Leni helps Clyde not act nervous around Lori, which leads Lori to believe they like each other.
Leni suffers from arachnophobia, so she kills all spiders she sees. Because she was afraid of Frances, she tried to kill the tarantula. However, when she learned the tarantula belongs to Lincoln's class, she saved Frances from the exterminator, but mainly to save her brother Lincoln. However, just because she saved the tarantula, doesn't mean she got over her arachnophobia.
Leni is good friends with Chaz, as she had him on the guest list for Lori's party in "Party Down". She later sends him the video of Lori having fun with her siblings at another party, prompting him and the other guests to go back to the Loud House.
In "L is For Love", it's implied that Leni has a crush on him, as shown when he helps her pick out a sweater that had matching stripes of two colors she had trouble choosing from. She later sends him a love letter to show her passion for him.
The fact that Leni would be romantically interested in a guy like Chaz despite her obsession with fashion and appearances, she's really not shallow or superficial--she cares more about a guy's inner beauty than his outer beauty.