Gabriel Agreste reveals that the Miraculous was damaged under unknown circumstances, however, at the end of Miracle Queen, Gabriel was able to repair the Miraculous with the aid of the tablet he had stolen from Master Fu, which contained a translated version of the spellbook.
In its charged mode the brooch changes from seven or nine feather segments to five. Its main color is pale, light grayish blue-violet, while the crystals on the top of each segment are pink. The lower part of the Miraculous also changes from the body of a peacock into a single teardrop.
As seen in "Ladybug", "Truth", and "Evolution" the actual damage to the Peacock Miraculous itself includes visible cracks on the back of the Miraculous.
In its Activated mode, the crystals on top turn black.
In its camouflage mode, the brooch changes color and form depending on whose possession it's in:
In the possession of Félix Graham de Vanily, the brooch looks like a peacock with an orange raindrop-shaped gem and dull gold triangle at the bottom center and with five dull gold tail feathers coming out from it with arrow-like geometrical patterns. It has an orange pearl-like gem topping each tail feather segment.
When it was worn by Gabriel Agreste, the brooch was gold and shaped like a peacock. It had seven tail feathers and on each of them they had red-purple rubies.
When it was worn by Nathalie Sancoeur, the brooch had the appearance of a peacock with the shape of a peacock's body and head at the bottom center and with nine light sea-green tail feathers protruding from it. It had a gold pearl-like gem on each tail feather segment and a blue gem at the base, which served as the peacock's body.
The Peacock Miraculous grants its wielder superhuman characteristics of speed, endurance, and strength.
Its special weapon is a Hand Fan. This weapon can be used as an offensive weapon and a means of communication with other Miraculous owners, as seen in "Miraculer".
The Peacock Miraculous' superpower is Amokization, which allows the user to manifest a Sentimonster, a monstrous creature manifested from a person's emotions. This is achieved by turning a feather into an amok and sending it to inhabit an object belonging to the recipient. The Sentimonster will obey whoever possesses its amok. The wielder of the Peacock Miraculous has the power to revoke the amok, destroying the Sentimonster and purifying the charged feather.
The wielder can also form a telepathic connection between themself and their target. They can also sense where an amok is.
The wielder can also use the power on themselves, namely by charging an amok and placing it in an object the wielder possesses. They can then create a Sentimonster that is completely loyal to them, so long as they possess the amok.
The wielder can destroy a sentimonster by snapping their fingers, even if the sentimonster was created by a different wielder.
Former Peacock Miraculous holder. Emilie fell into an endless sleep after overusing the Peacock Miraculous, which was damaged at the time. She is the mother of Adrien Agreste and the wife of Gabriel Agreste.
A famous French fashion designer and the former Peacock Miraculous holder, who also possesses the Butterfly Miraculous and is using it for evil purposes. Unifying the two Miraculouses, he transformed into Shadow Moth until "Strikeback", where he traded it with Félix for his ring and for Ladybug's Yo-yo which contained all of the Miraculouses of the Chinese Miracle Box.
Peacocks symbolize integrity, vision, and vibrancy.
As seen in "The Collector", the Miraculous spellbook has a depiction of the Peacock Miraculous that is blue and has five tail feathers. However, in "Mayura", the Peacock Miraculous uses the five-feathered design when inhabited by Duusu and the nine-feathered design when in its camouflaged mode.
As noted during an event with the writers, it was "weird" that Plagg didn't recognize it when he and Adrien looked inside the safe in "Volpina".
It has been confirmed that the jewel stored in the safe at that time wasn't the real Peacock Miraculous and is merely a copy created by Gabriel. However, the Peacock Miraculous shown in "Mayura" is clearly the real Miraculous, shown by it being in its charged state, which is activated by having a kwami in its Miraculous.
According to Gabriel Agreste, the Peacock Miraculous was "damaged", which resulted in it causing an adverse effect upon its holder when being used. This is demonstrated by Nathalie's coughing and fatigue as a result of using it.
In "Reflekdoll", the Peacock Miraculous malfunctions between its camouflage and charged state when Nathalie activates it before her transformation.
In "Ladybug", cracks can be seen on the back of the Miraculous.
As seen in "Miracle Queen" and "Truth", the Peacock Miraculous was fixed by Gabriel Agreste using the deciphered spellbook on Master Fu's tablet.
The Peacock and Butterfly Miraculouses have rather similar powers.
Both allows the user to charge small things with magic to infect objects of specific people and telepathic communication with them.
They are also the only two known superpowers which the user does not need to say the superpower's name to activate it.
Interestingly, both Miraculouses take the form of brooches, which may cast light on the fact that they have such similar powers.
They are also both currently used for evil purposes.
However, the Butterfly Miraculous's power of Akumatization cannot be used on the wielder (unless they renounce it), unlike the Peacock.
Unlike Akumatization, however, Amokization can infect an object that's been destroyed, although it is still possible to damage it further to release the Amok.
Also, unlike Akumatization, the Sentimonster can only be controlled by the one who possesses the object containing the Amok, while the power to control Akumatized champions belongs to the Butterfly Miraculous owner.
Like the Ladybug and Cat Miraculouses, the legacy of the Peacock Miraculous dates back to Ancient China and is over 5000 years old.
Exactly how the Peacock Miraculous was damaged whilst the Butterfly was not is unclear.