Nooroo

Nooroo is the kwami of Transmission who is connected to the Butterfly Miraculous. With his power, Nooroo's wearer can use the brooch to transform into a butterfly-themed superhero.

Nooroo and his Miraculous are currently active, used by Gabriel Agreste to transform into the supervillain, Hawk Moth.

Nooroo is a little, purple, butterfly-like creature, who is 10 centimetres tall. He has butterfly wings that have a long tail with a tip at the end of each lower wing and dark purple eyes. There is a slightly dark purple spiral mark on his forehead and one on each lower part of the back of his wings.

Nooroo is a knowledgeable, helpful, and empathetic kwami. He shows a bit of his curious side in "Gorizilla" when Gabriel thought Adrien might be Cat Noir. Like Wayzz, Nooroo has a formal side, calling his holder Master instead of his real name.

Though he reluctantly succumbs to Gabriel's demands to help him get the Ladybug Miraculous and Cat Miraculous, Nooroo is distressed that he is helping someone use the Butterfly Miraculous for evil reasons. When Gabriel later learns that there are more kwamis and tells him that he wants to find them all, Nooroo is scared and concerned for his friends.

In "Stormy Weather 2", Nooroo demonstrates a remorseful side, being aware of the damage that's been happening with his powers.

In addition to this, Nooroo is sometimes scared of Gabriel and is quite meek with him, such as in “Syren”, when Gabriel interrogated him on how to obtain more powers. In “Sandboy”, when he attempts to sneak away but is caught by Gabriel, he appears frightened and meekly tries to explain his motives.

Nooroo transforms Gabriel into Hawk Moth.
Nooroo is able to fly, levitate, phase through solid objects, and carry things that are large and/or heavy for him.

As a kwami, Nooroo possesses and grants the wielder the power of Akumatization, transforming his wielder into a butterfly-themed superhero by entering the Butterfly Miraculous.