Leni's sleep attire simply consists of a nightgown, which resembles her regular outfit, only longer and sleeveless with white trimming on the collar. She also wears a magenta sleep mask with a picture of closed eyes on it.
Leni wears a pink coat, a green beanie, dark pink gloves, a white and red scarf, dark pink tights and green winter boots.
In these episodes, her swim attire is different. Her skirt was swapped for a bikini bottom with white puffs near her legs, she has her sunglasses, and also lacks the swim cap and sandals.
In Lincoln's fantasy about being at the grownup table, Leni, like everyone else, dresses in formal attire. She wears a fancier version of her turquoise dress.
In a flashback to when possums chewed up the house's wiring, she has her hair in an updo with a pink feather, and wears a green 19th-century dress, white opera gloves, a choker and different red earrings, after reading a series of books about pioneers with her siblings.
Leni's first Christmas outfit is a turquoise dress with an elevated skirt and a white waistband. She adds fringes near her chest and stripes on her skirt with material from Rita's Christmas tablecloth. She also wears red spherical ornaments as earrings.
In a flashback, Leni wears a swimsuit bearing a resemblance to her usual swimsuit, albeit without buttons or a swim cap.
Leni's second Christmas outfit is a dress made out of white tinsel. She wears a red bow around at the waist area and wears red Christmas light bulbs as earrings.
Leni's third Christmas outfit is made from the family's stockings.
On Christmas morning, Leni wears a pair of white high heels that she got as a Christmas present.
While putting on a play to persuade their parents to take them to the resort, Leni dresses in a pink cat costume with triangular sunglasses on her head, which are used as ears.
When Chaz discovers Leni's love letter, she’s dressed as one of the store mannequins. This outfit consists of a dark blue dress, slip on shoes, a light blue sun hat and a light purple feather boa.
While working as a waitress at the Aloha Comrade, Leni wears white slip-on shoes, a black skirt, a red shirt with yellow hibiscus all over it, crimson red earrings and a red bowtie.
During a flashback, there was a younger Leni wearing a seafoam green shirt, her white sunglasses, brown cargo shorts, white socks and seafoam green shoes.
In a flashback, Leni wears a fancy green dress and white slip-on shoes.
Leni wears a pink beret while posing for Lori's selfie.
While helping Rita by acting 'perfect', Leni wears a light blue shirt with puffy sleeves and white collar, a blue pleated skirt, white knee-high socks and black Mary Jane shoes. Her normal sunglasses are replaced by a blue hairband.
Leni disguises herself as Lori to stop Lori from attending Fairway University. She wears a light blue collar shirt and khaki shorts, and her hair is styled to look similar to Lori's. Leni also retains her red hoop earrings and her white sandals with light green bows on them.
Leni wears her teal dress but with a black and white striped top, a pink short sleeve hoodie jacket, a blue dress, a dark pink fingerless glove on her right hand, a couple of bracelets on her left arm, a white boot on her right foot and a pink spotted high heel with a light pink sock on her left foot. She also has her hair in a ponytail.
Leni is shown as a dog, wearing pink circles to hold her sunglasses in place, and a sky blue sleeveless dress with a white lace pattern on it. She also wears a white tag shaped like a house, with her name in blue letters.
In a drawing of herself, she wears a black jacket, a white shirt, grey pants, and black boots. She also doesn't wear her sunglasses.
In another drawing of herself, she wears large golden earrings instead of her usual ones, a necklace, an orange shirt, baggy blue pants with several slits in them, and white flats.
She wears a white hair bow, a seafoam green mask with white lace, a seafoam green dress with white trim and a large collar, white pants, and seafoam green fingerless gloves with white sleeves attached.
In a flashback to when she was a baby, she wears her sunglasses and a diaper.
In flashbacks showing her at ages three through five, she wears a seafoam green shirt, brown pants, white socks, and blue shoes. She also wears her usual sunglasses with red lipstick.
In a photo of her sewing, she wears the same outfit, but with purple shorts instead of brown.
She wears a long-sleeved, old-fashioned, black dress.
She wears the same dress, along with black cat ears, a pink fluffy earring, two gold rings, a diamond ring, a blue ring, a yellow bracelet, and a pink bracelet.
She wears white makeup, fake vampire teeth, a black dress, a vampire cape with a black choker featuring a red diamond, with cranberry jam disguised as blood around her mouth.
