Mylène Haprèle

Mylène Haprèle is a student at Collège Françoise Dupont. In "Horrificator", after feeling humiliated for getting scared easily while filming Nino's movie, she gets infected with an akuma by Hawk Moth and becomes Horrificator, a monster supervillain.

Appearance
Mylène is short and chubby with golden brown eyes and blonde hair, with some strands dyed green, blue, and magenta, put in dreadlocks. One dreadlock on her left side of her head has a purple cat bead, and another dreadlock on her left side has a golden loop.

She wears a pink bandanna to hold her hair back, and she has a necklace with a stone pendant. She wears a periwinkle shirt with a white silhouette design on the front of a bird holding a branch with leaves, which is underneath an olive green hoodie jacket. There are pins attached to her jacket: on the right side, she has a daisy pin; on the left side, she has a ladybug pin, a panda pin, and a yellow and green pin. Additionally, she wears dark gray jean shorts, black leggings, and dark purple and white sneakers.

As Horrificator, she is a large salamander-like monster, the top half of her body mainly pink and the bottom half, along with her forearms, mainly purple. She has three yellow eyes with red pupils, the third eye being in the middle of her forehead, and periwinkle tentacles with spots are on the back of her head. Her head has freckles; her mouth has sharp, jagged white teeth, and her tongue is light blue. She has dark purple claws on her hands, while the claws her her feet are brown, the toes being tan-colored. Also, she has a long purple tail. The pin that Ivan gave her is attached next to one of her head tentacles, but is hidden by her pink goo.

Personality
Mylène is meek and cordial. Although she tries to be brave, she is easily frightened by anything that she sees as scary, which she is ashamed of and even cries about in "Horrificator". She also is sensitive to being made fun of, hurt by Chloé's mean remarks about her. She appreciates kindness, and she speaks very fondly of those she loves.

As Horrificator, she relishes in making everyone scared (as opposed to her being scared). Aggressive and menacing, she attacks everyone and doesn't like it if any of them aren't freaked out by her. She doesn't harm Ivan, though, because she likes him. When she is calmed down and tiny, her bravado and confidence are gone, leaving her terrified by the others and running into Ivan's arm for comfort and protection.

Ivan Bruel
Mylène has romantic feelings for Ivan.

In "Horrificator", she appreciates his attempt to console her after she was insulted by Chloé, but she ends up crying and running away to the bathroom anyway. Once akumatized, she doesn't attack Ivan, licking his face instead. After shrinking thanks to her calming song "Smelly Wolf", she runs into Ivan's arms and, after transforming back, they kiss.

In "Darkblade", when she and her classmates are in the City Hall sieged by Darkblade and his knights, she gets close to Ivan, so he hugs her to comfort her.

Fred Haprèle
Mylène loves her father, and she is proud of his acting abilities.

As a villain
As Horrificator, she can spit a very resistant purple goo that she uses to block exits and trap people. Whenever she catches people, she brings them to her lair and traps them inside hardened cocoons. Whenever people scream in fear because of her, she grows larger, but if they stay calm or calm down, she shrinks, becoming as small as a house cat. The larger she is, the stronger she gets, and she can make use of her tail by grabbing people with it.

Sightings

 * Miraculous: Tales of Ladybug & Cat Noir Theme Song

Season 1

 * The Bubbler (background)
 * Mr. Pigeon (background)
 * Timebreaker (background)
 * Copycat (background)
 * The Evillustrator (background)
 * Rogercop (background)
 * Dark Cupid (background)
 * Horrificator
 * Darkblade (background)
 * The Mime
 * The Gamer (background)
 * Antibug
 * Reflekta
 * Ladybug & Cat Noir (Origins - Part 1)
 * Stone Heart (Origins - Part 2)

Trivia

 * Whenever she needs to feel better, she sings "Smelly Wolf" to herself. Ladybug uses this to stop Horrificator by singing the song to her with Cat Noir and their remaining classmates.