|“||It's Louise, as in 'Jeez Louise, You're the best!'||„|
|~ Louise introducing herself|
Louise Belcher is one of the main protagonists and the youngest member of the Belcher family of Bob's Burgers. She is nine years old and in the fourth grade. Despite being the youngest member of the family, she has been shown many times to be smarter than her older siblings, Tina and Gene. She is voiced by Kristen Schaal, who also voiced Mabel Pines in Gravity Falls, Trixie in Toy Story 3 and Jake Jr. in Adventure Time.
Louise typically wears a short-sleeved, olive-green dress slightly below the knees; black, mary-jane flats; and a hot pink beanie hat with rabbit ears on top of it. Like the rest of her Italian-looking family, she has black hair and olive skin. Her black hair peeks out from her large hat, slightly exposing the hair-ties holding up her pigtails; her yellow hair-ties in the front covered up by the long ends of her bunny hat along with the aglets of her hat. Like her mother and older sister, Louise's hair has curls at the ends, specifically her pigtails have curls at the ends.
In spite of being the youngest, Louise usually dominates her two older siblings by "wear[ing] down [their] self-esteem over a period of years." Precociously intelligent, manipulative, and aggressive (even towards adults), she is more than willing to exploit people if there is anything to be gained, and has a history of gaslighting her siblings, especially Tina. She has an offbeat and dark sense of humor and picks locks as a hobby. She tends to be very loud and often shouts at the top of her lungs to get her points across. Since she was a baby, Louise has always liked Bob more than Linda, opting to spend more time with him as she finds him much more interesting; it can generally be assumed that Louise and Bob have a very strong relationship, although she is the most prone amongst her siblings to mock him.
- She is the only Belcher in the family to be voiced by a woman, while Tina and Linda are voiced by men.
- Her personality is very similar to Mabel Pines from Disney's Gravity Falls (aside the fact that they're both voiced by Kristen Schaal).