Lisa Marie Loud is one of the main characters of The Loud House and one of the deuteragonists in the 2021 Netflix/Nickelodeon film The Loud House Movie. Lisa is the second youngest child in her family.
Before the beginning of the series, Lisa, despite her very young age, is a Junior Nobel Prize recipient. Though she is currently in first grade, she is exceedingly smarter than the other kids her age, nonetheless, that she can move up at least six grades.
Though the second-youngest of the Louds, Lisa is a child prodigy, so she's the smartest kid in the bunch. Because of this, she often tends to be egocentric, boorish, condescending, and sarcastic with other people. She speaks with a lateral lisp, and usually has a stoic frown, though she does smile from time to time.
Lisa is not as excitable as her siblings, although sometimes she can become excited when something really good happens, like when she and the other sisters find out about Lincoln's apparent romantic situation in "Heavy Meddle". She states this is because she does not partake in mundane human emotions. In "Study Muffin", she was also shown to have fallen for Hugh like all of her other sisters, and showed a more immature side to her, at one point having Hugh show off his six pack under the lie that she was teaching Lola human anatomy with him as an example. She also became somewhat irrational, claiming she would marry Hugh, and have children with him, despite the obvious age difference, and following him around like her other sisters. She also does not believe in superstition, fortune telling, blessings or curses as she is a realist and believes only in science, as stated in "Raw Deal" and "Study Muffin". However, she believes in aliens, as she claimed in "Friend or Faux?" Nonetheless, she likes to be with her siblings and have fun with them, even if she doesn't express it.
In many episodes, she can be seen working on strange experiments. In "Left in the Dark", she creates a cookie with the infused DNA of a jellyfish, which she called "Gloweos", and if someone ate it, their body would glow. One of her favorite hobbies is resolving very difficult math problems. She also likes to study the poop and bathroom habits of her siblings, something they all find gross and annoying.
As seen in "Overnight Success", Lisa not only likes to realize experiments with her siblings, but she also likes to realize them with people outside of her family.
Though easily the most mature of her siblings, she can also be quite mischievous and sneaky. For the most part her pranks are hidden in unassuming objects; such as acne cream, sunscreen, mouthwash, etc, with results like turning skin blue, mild sunburns, and hot-pepper induced fever, respectively. Lisa is also completely willing to join in the madness caused by her siblings, whether it be disputes over money, the "sweet spot", or just playing along. This proves that while Lisa is a genius, she's still a kid and acts her age.
Contrasting most of her family, Lisa is very honest and blunt about what is on her mind. Lisa's brutal honesty isn't so much out of a sense of morality, but because she doesn't want wasted brain space by making up a lie. This also makes her incapable of keeping a secret. Like Lincoln she's very individual in contrast to rest of the sisters as seen in "It's a Loud, Loud, Loud, Loud, House".
Lisa, like her polar opposite Leni, is ironically very scatterbrained. She can frequently forget crucial ingredients to her various experiments, which can lead to devastating, though hilarious, outcomes. She also frequently forgets to look up while reading while walking, much to her embarrassment, and tends to misplace her vials, test tubes, and chemicals.
In "Party Down", Lisa appears to have a fun side. As she gets a sugar high from having too much chocolate from a chocolate fountain. This proves that Lisa isn't a complete no nonsense person and can loosen up and act her age.
In "Time Trap!", Lisa and her siblings altered history, causing their parents to decide not to have any kids in the future. She and Lily work together prevented this timeline alteration to save her siblings from being deleted out of existence.
Personality
Despite her position as the second-youngest member of the Loud family at the age of 5 (formerly 4 in past 4 seasons), Lisa is a child prodigy capable of creating highly complex inventions. As a result, she has a tendency to be boorish, egocentric, sarcastic and condescending with other people. She suffers from a lateral lisp and has a stoic frown, but many instances when she is seen smiling do exist, such as after her Podcast was ruined in Listen Out Loud and she congratulated her family for making it up for her when they asked her to identify a species and she was told herself that she was that species.
Despite not being as excited as her siblings she has been shown sometimes to reach that state when something good happens such as when she and her sisters find out about Lincoln's romantic situation in "Heavy Meddle". Furthermore, she doesn't believe in curses, blessings, superstition nor fortune-telling since she's a realist who believes only in science.
Contrasting to her family, Lisa is very honest and blunt about what is on her mind. Lisa's brutal honesty isn't so much out of a sense of morality, but because she doesn't want wasted brain space by making up a lie, this makes her incapable of keeping a secret.
Like her polar opposite sister Leni, is ironically very scatterbrained. She can frequently forget crucial ingredients to her various experiments, which can lead to devastating outcomes. She also frequently forgets to look up while reading while walking, much to her embarrassment, and tends to misplace her vials, test tubes, and chemicals.
Her parallel counterpart, Levi, has a similar personality, yet is calmer and harsher.
Appearance
Lisa wears thick round glasses to improve her vision. These glasses actually hide her eyes, save the pupils, with their lenses. She has short, baggy brown hair (said to be a wig), and has a green turtleneck sweater, pink pants, and brown shoes. Her outfit droops to show her stoic demeanor. When running her experiments, Lisa wears a lab coat. It is shown her eyes are beady when their true form is revealed, which can only be done by removing her glasses.
Her parallel counterpart, Levi, looks similar except he sports his lab coat all the time, even when he's not running an experiment. He also has shorter hair.
Lisa is reminiscent of Dexter from Dexter's Laboratory.
Her song's genre in Really Loud Music is rap, which fits how it is called the Periodic Table Rap. Here, she goes into a rap about some chemicals related to the periodic table. Some of her words are puns, such as Afradium (from "afraid")
In The Loud House episode "Friend or Faux?", it is revealed that Lisa has no friends, due to her condescending and anti-social attitude as well lack of understanding of friendship.
Her Casagrandes counterpart is Carlos Casagrande.
She was the main antagonist in some episodes, such as "Snow Bored", "Making the Grade", and "House of Lies".
