Duusu

 is the kwami that is connected to the Peacock Miraculous and with her power, its wearer can use the brooch to transform into a peacock-themed superhero.

Her Miraculous was somehow damaged, as stated by Gabriel Agreste in "Mayura". As of that same episode, Nathalie Sancoeur is Duusu's current owner.

Appearance
Duusu is a deep blue creature and is 10 centimeters tall. She has a small pale crimson circle on the center of her forehead, and her eyes are pale crimson with dark blue sclerae. Her tail, reminiscent of that of a real peacock, contains five feathers. The eyes of the feathers are pale crimson, with a black interior and a dark blue exterior. She also has three feathers coming out from behind her head, the central one of which is longer than those to its left and right. Her mouth is a plum color and contains rows of teeth on the top and the bottom.

Abilities
Duusu is able to fly, levitate, phase through solid objects and carry objects that are larger and/or heavier than her.

As a kwami, Duusu is able to transform the holder of the Peacock Miraculous into a peacock-themed superhero or super-villain and gain the power of summoning, which implies the power to create a sentimonster who represent their emotions.

Before Season 1
When the concept or idea connected to Duusu came into existence, Duusu came into existence. Before the Miraculouses were created, Duusu and the other kwamis traveled all over the universe, unable to interact with humans. Eventually, a mage created the Miraculouses, which allowed humans to see kwamis and the kwamis to help them.

For an unknown amount of time, Duusu had been dormant in the Peacock Miraculous, stored in the Miracle Box at the temple of the Order of the Guardians in China. More than one hundred years ago, Master Fu's mistake resulted in not only the destruction of the temple, but also in the loss of the Peacock and Butterfly Miraculouses. At some point in recent times, Gabriel Agreste found the Butterfly Miraculous and the Peacock Miraculous, and he took them with him back to Paris.

Season 1
Throughout the first season, Duusu was dormant in the Peacock Miraculous in the safe of Gabriel Agreste's mansion.

Season 2
In "Sandboy", she was briefly mentioned by Sass, he said that he had not heard from her for a long time.

In "Mayura", her Miraculous becomes temporarily activated by the titular villain to save Hawk Moth then was returned to Gabriel's safe afterwards.

Season 3
In "Miraculer", Duusu is briefly activated by her owner to transform into Mayura, though she isn't seen on screen.

Trivia

 * She was first revealed by Jeremy Zag with a picture posted on his Instagram on June 27, 2016. The post did not contain any comments from him.
 * The official Miraculous Ladybug Twitter, however, did comment on the image, stating "Who do you think is hiding behind the peacock kwami? 💙 "
 * As seen in the concept art, when she cries, her tears appear to glitter.
 * This idea, however, is part of an old concept and may not be true in the completed version of the character.
 * Her name was revealed on October 7, 2016, during the Miraculous panel at New York Comic-Con.
 * Duusu's name may be based on the Serbian and Croatian word "duša", meaning "soul."
 * Also, another piece of concept art that was revealed shows Duusu with her Miraculous' future holder, which later turned out to be Nathalie Sancoeur.
 * Her first appearance in any Miraculous media is in the second issue of Miraculous Adventures, alongside several kwamis, known and unknown, as they fly through space in a flashback.
 * Out of all the known kwamis, she's the only one who didn't appear in "Sandboy", however, she was mentioned by Sass.
 * Also, she's the only kwami known at the time who didn't appear in Season 2.
 * She and Nooroo are the currently the only known kwamis who have fallen into the hands of a villain.

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