Hawk Moth

Gabriel Agreste (a.k.a. Hawk Moth) is the main antagonist of Miraculous Ladybug.

Miraculous abilities
Gabriel owns the Butterfly Miraculous, which grants the power of Transmission. With it, he has the following abilities:
 * Akumatization - he can create akumas.
 * Telepathy - he speaks to his akumatized victims.

List of akumatized victims

 * Alya
 * Sabrina
 * Chloe Bourgeois

History
Gabriel married an actress named Emilie and had a son named Adrien. Sometime, he found the Butterfly and Peacock miraculous as well as receiving the miraculous book from his wife herself. Sadly, his wife died of an unknown cause (although likely because of the Peacock miraculous). Since then, he used his miraculous' power for evil.

Trivia

 * In two episodes, Hawk Moth said that "revenge is a dish best served cold". In "Feast", he referenced to it, saying, "revenge will be served, very cold".