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This article is about the Ladybug Miraculous. You may be looking for another Ladybug or Miraculous.
I used to think that maybe [Ladybug] was a scientist who got stung by a radioactive ladybug while strolling at the Cité des Sciences. But the more I think about it, the more I believe it's actually the earrings that help Ladybug to transform, so the whole bug-bite theory kind of went out the window.
In general, the earrings are circles with a smooth surface and a silver lining. In charged mode, they become red with five black spots in a quincunx pattern. If a minor is using the miraculous, the earrings start running out of power, they make a beeping sound, and the dots start disappearing one at a time as an indication of how much time (one dot is equivalent to one minute) Marinette (or another Ladybug Miraculous holder) has left.
In its Activated mode, the black dots disappear, making the earrings completely red.
In its camouflage mode, the earrings change in shape and color depending on whose possession it's in:
When worn by Adrien Agreste, the earrings are silver and flatter than Marinette's.
When worn by Alya Césaire, the earring are in a honey caramel color, And there is a circle bump on top of the earrings, The bottom part of the earrings are more flattened than Marinette Dupain-Cheng's camouflaged design.
The Miraculous' camouflaged form when worn by Adrien Agreste.
The Miraculous' camouflaged form when worn by Alya Césaire.
The Ladybug Miraculous grants its wielder incredible powers of speed, endurance, and strength. Its special weapon is an unbreakable yo-yo, which can be utilized as both a weapon, a communicator, and an object that can be used to breathe underwater. Its special superpower is called the Lucky Charm, giving the user the ability to create a useful arbitrary object in order to obtain their goal, like defeating a villain. As long as the superpower isn't used, the wielder can remain transformed indefinitely. However, as soon as the superpower is used, the wielder loses power and the transformation wears off in about approximately five minutes. The earrings also have the ability to give the wielder the costume they truly desire.
The Ladybug Miraculous can also purify anything “corrupt or malignant”.
Using the yo-yo, the holder traps the infection, an infected creature, or an infected object, so the yo-yo cures it. When the yo-yo opens, the infection is gone, and if there was an infected animal or object, it is healed or clean. The person can use the Miraculous' purification power on various things, like akumas created with the Butterfly Miraculous or an unknown black substance, as seen in fourth issue of Miraculous Adventures.
The other power is the Miraculous Ladybug. If there is damage caused by a villain, Cat Noir's Cataclysm, or any other Miraculous superpower, no matter the amount of damage, the holder throws the Lucky Charm object in the air and says Miraculous Ladybug, the Lucky Charm turns into a swarm of magic ladybugs with restoration power that repair all damage from the recent crisis in an instant. The restoration power is also capable of healing those who are hurt by villains or their own powers, even going as far as to bring people back from non-existence.
If the Ladybug Miraculous and Cat Miraculous are used together while also using a special invocation, the holder will achieve ultimate power. The person wielding them can make a wish that can alter reality. However, because the universe must maintain balance, every action has a reaction; for instance, a wish to become human would result in someone losing their humanity.
In "Troublemaker", Cat Noir suggested that when Ladybug lost an earring it weakened her powers but it's unknown if that is completely true.
The Ladybug and Cat are also more powerful than the rest of the Miraculouses.
It could be possible that any user of the Ladybug Miraculous can use any Lucky Charm to summon the Miraculous Ladybug (superpower) even if they didn't summon the object, as seen with Ladybug in "Sandboy". Also seen in "Weredad" and "Miraculer", if the holder can't use the Miraculous Ladybug (superpower) as the result of having no Lucky Charm, the power can be activated by using the yo-yo.
In "Mr. Pigeon 72", it's revealed that Ladybug Miraculous holders powers are limited only by the limits they put on themselves and can develop new powers simply by allowing themselves to do so. Once Ladybug learned of this, she invented a new superpower for the Ladybug Miraculous: the ability to create Magical Charms to ward away akumas from anyone who is wearing them, protecting them from future akumatizations.
With this new power, whenever she summons a Lucky Charm, her costume gets upgraded, and it lasts until she throws the object to summon the Miraculous Ladybug. Once this is done, she is able to conjure a magical charm from her yo-yo.
After Tikki consumes one of several special potions or an eatable made with one, and the wielder transforms, they are able to unlock power-ups, an additional specific ability granted by each potion. So far, only seven potions have been shown, each with a unique color:
The green-blue potion transforms Tikki into "Aqua Tikki", which grants the wielder the ability to breathe underwater and improve their swimming capability with flippers added on the feet.
The light blue potion transforms Tikki into "Stalac Tikki", which grants the wielder ice-related abilities, and the suit gains a pair of skates to move freely on ice. In this form, the round spots on the suit and the yo-yo change into hexagons.
The purple potion transforms Tikki into an unknown space form and grants the wielder the ability to move freely and breathe in high altitudes and space.
A French teenage girl and the current Ladybug Miraculous holder. Given to her by Master Wang Fu, Marinette is working to stop Hawk Moth and his supervillains. She uses the Miraculous to transform into Ladybug. Later, she would unify it with the Mouse, Dragon, Bee, and Horse Miraculouses to transform into Multibug, Dragonbug, Lady Bee, and Pegabug.
A famous French fashion designer and the current holder of the Butterfly Miraculous. In an erased timeline, Gabriel Agreste takes the Ladybug Miraculous from Marinette and, together with the Cat Miraculous he had previously acquired from his son, uses it to access the Ultimate Miraculous Absolute Power.
A French teenage girl who briefly kept the Ladybug Miraculous after Marinette gave up to be Ladybug and put it in her bag in "Stoneheart", until Marinette took them back. She also held onto the Ladybug Miraculous when Marinette was in London with her parents.
In the theme song, the Ladybug Miraculous are in the raised center of the Miraculous jewelry box with the Cat Miraculous, both of their sections creating a yin-yang symbol inside the box.
The Ladybug Miraculous is in the yin section (like in every yin-yang symbols, there’s also both of them in each). Some of the things that yin represents are coldness, darkness, passiveness, and intuition (which interprets the Cat Miraculous).
Ladybugs are known to be symbols of good luck, protection, and love.
Ladybug's legacy is over 5,000 years old, as revealed in "The Pharaoh" and also dates all the way back to Ancient China.
Both the Ladybug Miraculous and the Goat Miraculous are so far the only known Miraculouses that have two pieces.
The appearance of the Ladybug Miraculous appears to be based off a pair of studded earrings
The user needs to be wearing both earrings for the transformation to work. Although it is unknown if the transformation works with just one.
As seen in "The Dark Owl", if one of the earrings is taken, the suit will slowly dematerialize, though the yo-yo remains.
When the left earring was taken, the dematerialization began with the right side of the mask and the right hand, showing Marinette's bare skin.
In "Troublemaker", the left earring was taken, and the dematerialization began with the left side of the mask, both forearms, and both shins. Additionally, a high pitch beeping was emitted from the earrings. As the suit dematerialized, Marinette's body, excluding the face, was covered with pink energy. When the earring was returned, the missing parts completed themselves, and the beeping stopped.
In the early concept for the series, including before kwamis were created, the earrings gave pure luck to its wearer. However, as Thomas Astruc explained, "it only works when [the wearer uses] it for others. Otherwise, it backfires."
Because broadcasters believed pure luck as power was "too abstract for kids," Thomas figured out a different superpower, Lucky Charm. 
The design of the earrings was different in the Ladybug PV and early CGI animation. In them, the earrings had gold outlines around the edges of the earring and the black spots.
In "The Pharaoh", Ladybug gives Pharaoh a fake pair of earrings that more closely resemble the earlier design.
Thomas Astruc stated that he might include previous Ladybugs into the show if he finds a good story for them.
Like for the Ancient Egyptian Ladybug in "The Pharaoh", when Tikki mentions of the past Ladybugs in "Befana" and the Ancient Ladybug Miraculous holder in "Feast".
For a staged battle for Mr. Damocles as the Owl in "The Dark Owl", Marinette creates a fake replica of the Ladybug Miraculous, which she later uses to trick Mr. Damocles' akumatized form and Hawk Moth.
In the NYCC 2016, the Ladybug Miraculous seems to have other magical abilities. These abilities seem to be related to objects known as Stones and Pearls.
Stone of the Sun - Flying power
Pearl of the Mysteries - Infinite Lucky Charms
Pearl of the Heart - Cure the akumatized
Pearl of the Sea - Breathe and swim underwater
Stone of the Moon - Fly and breathe in space
However, Thomas later confirmed on Twitter that the Pearls and Stones are a concept that won't be featured in the show anymore. The Pearl of the Sea power was replaced by the green Miraculous potion.
So far, only one male, Micazoyolin, is known to have wielded the Ladybug Miraculous, thus until, followed by Adrien Agreste when he uses them to turn temporarily into Mister Bug after an incident causes a mix up of the Miraculous in "Reflekdoll".
The Ladybug Miraculous users are the only ones who can purify akumas and amoks.
In "Kwamibuster", in order to defeat the titular villain and to save the kwamis she had captured, Multimouse (Marinette with the Mouse Miraculous) combines the Ladybug Miraculous with hers, becoming Multibug.
The Ladybug Miraculous is the Miraculous with the most combinations, following the Mouse Miraculous, with four: the Mouse, Dragon, Bee and Horse Miraculouses.
It's unknown if all Ladybug Miraculous users were chosen to stop evil Miraculous users like Marinette with Hawk Moth.
Similarly as the Ladybug Miraculous can also repair a Miraculous in almost any condition it's likely used as a backup just in case if the users of Akumatization, Amokization, Liberation and any other powers that do damage either can't or won't undo their powers.
In ''Cat Blanc", the Ladybug Miraculous was destroyed alongside Marinette due to the titular villain's power hitting her. However, the timeline was then fixed by the Ladybug from the past, making so that the earrings were never destroyed in the current timeline.
As of "Mr. Pigeon 72", Marinette is the first Ladybug Miraculous holder to develop new superpowers, let alone figure out that her power is limitless.