Longg

 is the kwami who is connected to the Dragon Miraculous. With his power, its wearer can use the Miraculous to transform into a dragon-themed superhero. He is currently dormant in his Miraculous in Master Wang Fu's Miracle Box, as seen in "Sapotis".

Appearance
Longg is red with four black horns on his forehead: a black horn on each side of his face, and red horns from the upper back of his head with black spirals. Additionally, he has golden eyes, a whisker on each cheek next to his mouth, two small black spikes on his lower back, and a long tail with three black tips at the end.

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Personality
Longg is a bit formal calling Kagami "young lady" having a gentleman's approach and is quite informative explaining his powers. He has a tendency to ramble on a bit not seeing that his wielder is trapped inside an akumatized villain, but knows not to rush as he tried to tell Kagami Ladybug's plans.}}

Abilities
Longg can fly, levitate, and phase through solid objects. He can also carry objects that are larger and/or heavier than him.

As a kwami, Longg is able to transform the holder of the Dragon Miraculous into a dragon-themed superhero.

{{HideSpoiler|He gives the user the power to use abilities of water, air and lightning transforming into one of the three elements they chose just by saying water, air or lightning dragon. After all three elements have been used Longg loses energy giving the wearer five minutes until they transform back. It seems that Longg can fuse his powers with Tikki's to create the hybrid wielder Dragon Bug.

Kagami Tsurugi
As Longg and Kagami meet the Dragon Kwami tells her the abilities he'll grant her as Ryuko, but as she activates the Miraculous, Longg tries to stop her before he could fully inform Kagami of Ladybug's plan.

Ladybug
Longg knowing Ladybug's plan to defeat Ikari Gozen, as he had tried to tell it to Kagami before she activates transformation of the Kwami's miraculous, indicates that Ladybug might have gone over it with Longg before sending the Dragon Miraculous Kagami's way. As well as how she knows the Kwami's name, when she asked Ryuko if Longg had indeed gone over their plan with her.}}

Before Season 2
When the concept of weather came into existence, Longg came into existence. Before the Miraculous jewels were created, Longg and the other kwamis traveled all over the universe unable to interact with humans. Then, thousands of years ago, a mage created the Miraculouses. When his Miraculous was not being worn, Longg was dormant in the Dragon Miraculous, which was stored inside the Miracle Box.

Season 2
During Season 2, Longg was dormant in the Dragon Miraculous.

In "Sandboy", Longg was celebrating Nooroo's birthday in the Miracle Box with the other kwamis, and they were excited when Tikki and Plagg arrived. The kwamis marveled at the gift Tikki brought, a marker, and played with each other. When the time to find Nooroo came, Longg got into position in an effort to contact him, but the kwamis contacted his wielder instead. Hearing his voice, the kwamis shuddered at the thought of being his slave and prevented them from being discovered when they all cut off the connection. They realized if they contacted Nooroo's wielder, rather than Nooroo, then someone must have been akumatized, and Tikki and Plagg's wielders would be in danger.

Season 3
During Season 3, Longg was dormant in the Dragon Miraculous.

Trivia

 * Longg was first revealed from a second season trailer on August 31, 2017.
 * Thomas Astruc confirmed its name on Twitter on November 11, 2018.
 * Longg is the only currently known kwami to be based on a mythical animal.
 * Chinese dragons symbolize good luck, prosperity, heroism, boldness, and more.
 * The dragon is the fifth animal of the Chinese zodiac.
 * Longg's name is based on lóng (龙/龍), the Chinese word for "dragon."

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