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