Gabriel Agreste

Hawk Moth (Le Papillon in the French version, which translates to "the Butterfly") is a villain who wants Ladybug and Cat Noir's Miraculous and powers for himself. He creates and leads the akumas, evil creatures who transform normal people into supervillains.

Appearance
Hawk Moth is tall with dark gray eyes.

He wears a dark purple dress shirt with a black vest, a light pink butterfly-shaped bow with a purple button in the center, and black dress pants. Over his face, he wears a black mask. Whenever he is controlling someone with an akuma, a bright pink butterfly-shaped outline appears above his face and around his eyes.

Personality
Hawk Moth is cold, cunning, and determined. His greatest desire is to claim Miraculous to take over the world with, and nothing will stand in his way. His akumatized villains as his most powerful known weapon, he chooses his victims carefully and cleverly, giving them ideas if they're struggling to think up ones. He is a great deceiver, persuading people that he cares about their problems and give them powers, when in fact, he does it because of his ulterior motive to use them to get the Miraculous for him. If things aren't going his way, he easily loses his patience, threatening harm to Ladybug, Cat Noir, and even the villains he creates. After defeat, Hawk Moth vows revenge and, while stopping for a while afterwards, doesn't wait too long to try again with his akumas.

Ladybug
Hawk Moth wants nothing more than to defeat Ladybug, take her Miraculous, and make her suffer once he wins. While he despises both her and Cat Noir and wants both of their Miraculous, he seems to blame her more for their successes and feel more aggression towards her.

Cat Noir
Like with Ladybug, if to a slightly lesser extent, Hawk Moth despises him and intends to take his Miraculous.

Akumatized villains
The only purpose Hawk Moth creates akumatized villains is because he needs them to retrieve Ladybug and Cat Noir's Miraculous from them. He pretends to be a caring friend, promising to assist them with their dark desires by giving them powers, just as long as they return the favor with the Miraculous. He often stays involved with what they're doing, and he'll give advice or plans to them in some situations. However, if an akumatized villain doesn't follow through with obtaining the Miraculous, Hawk Moth isn't pleased. He is frustrated by the Bubbler kicking a bubble that holds Ladybug and Cat Noir into the sky without their Miraculous, and when the Evillustrator avoids his responsibility by preparing for a date with Marinette, he temporarily controlled his body just to warn the Evillustrator if he didn't get his work for him done soon.

Abilities
Hawk Moth can energize butterflies with dark energy, which transforms them into akumas. He sends them out to possess the object of a vulnerable person, and then after they agree to serve him, he transforms them into supervillains. To telepathically communicate with his creations, a pink butterfly-shaped frame of light appears in front of his face and the villain's face. For a brief amount of time, he can control the villain's body, preventing them from doing anything.

Trivia

 * Hawk Moth is also called the Butterfly in other sources.
 * The Butterfly Miraculous that the pink kwami inhabits, as seen in the theme song, looks identical to the bow that Hawk Moth wears, likely meaning he already has possession of at least one Miraculous.