At 18-years-old (17-years-old before Season 5), Lori is the oldest child of the Loud family. This is a fact she uses to assert authority and absolute dominance over her siblings. Lori is an alumnus of Royal Woods High School, which she attended with her siblings Leni, Luna, and Luan. Lori is currently in college as of "Schooled!".
Being the oldest of the siblings, Lori is bossy, condescending, somewhat rude and she has a bad temper. Lori tends to come off as an anti-hero, if not downright antagonistic for those not familiar with her. She tries to keep the house from ending up in a pile of rubble or ashes. But aside from that, she is also friendly, kind, and insecure. She is protective as she locks her room with a key and electronic keypad lock.
She likes to keep her shoes under her bed for unknown reasons. She does not like the others touching her possessions, especially her cell phone, which seems to be her most valuable object. The reason for this is that she does not want to waste her phone memory for messages other than the ones from Bobby. She is also very territorial as she loudly yells at anyone who goes into to her room without permission before kicking them out.
In some occasions she acts without thinking, and commits malicious actions against the others for her own selfish benefits, like in "Driving Miss Hazy," but since her love for her family always comes before any petty problem, she has a caring heart underneath a rough exterior, and she will always try to fix her mistakes. Deep down, Lori is insecure and is usually frustrated with the responsibilities and burdens of having to take care of her nine wild sisters and only brother. It is also shown that while she gets annoyed and easily agitated by a lot of people, she feels lonely without the people she loves and cares about (such as Bobby and her family) and her worst fear is in fact, losing them forever.
"Lori Loud is 'literally' the oldest of the Loud children. She's the self-proclaimed boss and the only sister with a driver's license...so it pays to stay on her good side. A professional texter and avid eye-roller, Lori is never afraid to tell people how she feels."
Lori is the tallest among all her siblings. She has large blonde hair (a genetic trait she shares with her mother, even though the latter's hair is longer). Her original design depicted her with pink eyeshadow, a white tank top, navy blue shorts, and black shoes. Later it was changed with a light blue tank top, brown cargo shorts, blue-gray slip-on shoes, and light blue eyeshadow. She also wears white pearl earrings.
Her nightwear consists of a sky blue nightshirt and blue slippers, but later, her current one contains a white tank top, and small blue and white shorts, with a checkered pattern. Her swimsuit is a two-piece light blue bikini.
In "Come Sale Away," a picture showed that she used to wear braces and a blue ribbon and previously had acne when she was younger. In "Anti-Social," it was revealed that she also used to wear glasses.
Her phone is a handheld object owned by her. She often talks to her boyfriend Bobby with it, but she also talks to other people from time to time, and uses her phone to send and receive text messages as well. A common animation goof with her phone is that it changes colors at times.
In the alternate universe in which Lincoln has ten brothers instead of ten sisters, Lori is a boy named Loki Loud. Unlike Lori, Loki is even more selfish, greedy, and very bossy around the others. He is also mean and abrasive towards Lincoln and mocks him for Luke (Luna) using him to clean the toilet, Leon (Lily) for biting his thumb when he gets a "boo-boo," and teases him about Ronnie Anne. Loki is also more of a slob than Lori, bragging about his farts and not caring that the bathroom is messy.
However, in the dimension in which the sexes of the Loud kids are the exact opposite (meaning that it is one girl and ten boys), Loki's shown to be very caring and protective of his sister, Linka - in fact, Loki's the first of the brothers to ask Linka (technically Lincoln in Linka's body) if she's okay after he and the rest of the brothers heard her screaming in the middle of the night.
Loki eventually turns out to be a product of Lincoln's imagination as the whole adventure was revealed to be a dream, from which Lincoln wakes up at the end of the episode.
The High Card
In the minicomic Deuces Wild! and its animated adaptation, Lori takes on the superheroine identity The High Card. She is one of Ace Savvy's sidekicks. Her powers are not shown, as she's only seen driving a van. In the comic, she is summoned by Savvy alongside the rest of Savvy's deck to help him and One-Eyed Jack defeat the gas monster. After they defeat it, they prepare to fight against a garbage monster. (In reality, Lori and her siblings were only helping to change Lily and take out the trash).
In "Pulp Friction," she is only seen driving the van, and her abilities are not shown. This is also the episode in which Lincoln comes up with the High Card, making a comic featuring superheroes based on his sisters to enter in a contest.
In "Kings of the Con," it is revealed that Lincoln's comic featuring the superheroes based on his sisters has become famous, so when Lori came to the convention dressed as the High Card (along with her siblings in costume), everyone was impressed.
In Lincoln's dream where he has twenty-five rabbit sisters, there is one named Betty who seems to be even more based on Lori than Bridget.
Betty wears a drill sergeant outfit, like the one Lori wears when she's trying to be intimidating. Like Lori, Betty also seems to be a bit of a romantic, as she expresses great interest in her brother's love life. Clyde's alter-ego, Danny, also has a crush on her in a similar way to how Clyde has (or had) a crush on Lori.
An unnamed mermaid is Lori's alter-ego in the story the Loud children made up in "A Dark and Story Night". The mermaid resembles Lori, but with a ponytail, no shirt, and a blue tail.
In the story, the mermaid was using a shard of a crystal needed to bring electricity to a kingdom to charge her cellphone. When the story's protagonists asked the mermaid to give up the shard, she refused because she required her cellphone to keep in touch with her boyfriend, a bear. Lisa's robot alter-ego then built a waterwheel for the mermaid to use instead, so the mermaid, who was revealed to be a helpful sort, gave up the crystal shard.
Her name is a variant of the Latin name "Laura," and is the abbreviation of "Lorraine".
Her name also means "The laurel tree or sweet bay tree."
Lori's pajamas are similar to what she wears in her prototype design.
In "Selfie Improvement", Leni believes that her middle name is "Marie", perhaps because of their father saying it when they're in trouble. Her driver's license lists her name as "Lori L. Loud".
According to Bobby in "Back in Black", Lori is on the varsity golf team, implying she is an excellent golfer. She also talks about attending a golf tournament in "No Such Luck." In "Change of Heart," she is seen going to a golf tournament.
In Lynn's episode of the Listen Out Loud podcast, Lori says that one of the reasons she likes golf is because of her dislike of running.
Lori is the third most feminine Loud sister, after Leni and Lola. She usually wears shorts instead of a dress, but she loves fashion and other stereotypical teenage girl things.
From the picture of her feeding baby Lincoln ice cream in "The Whole Picture," it looks like she has worn similar clothes for most of her life.
According to episode 20 of the Nick Animation podcast, Lori's favorite movie is Dirty Dancing.
Lori says that her favorite food is sushi, although she has never tried it.
Her dream job is to be the chief executive officer (CEO) of a major corporation – or, at the very least, the co-CEO of a major corporation.
According to the image of her feeding Lincoln ice cream in "The Whole Picture", she had an extra pair of eyelashes when she was younger.
Lori is known to have a flatulence problem but refuses to admit it.
Whenever she farts, she always tries to claim that it was her shoes, creaky floorboards, or seats, that made the "farting" noise.