Viperion

Luka Couffaine is a supporting character from Miraculous: Tales of Ladybug and Cat Noir. In the season 3, he receives the Snake Miraculous from Master Fu, which, when inhabited by the kwami Sass, can transform him into Viperion, a snake-themed superhero.

He is voiced by Andrew Russell.

History
Luka and Marinette first met in Captain Haddrock and Luka quickly develops romantic feelings for her.

In "Silencer", Luka is akumatized by Hawk Moth into the voice-stealing supervillain Silencer, Luka even confesses his feelings to her.

Trivia

 * Luka Couffaine is the sixth person to become to a Miraculous holder who was also an akumatized villain, following Nino Lahiffe in "The Bubbler" and Alya Césaire in "Lady Wifi", Lê Chiến Kim in "Dark Cupid", Max Kanté in "Gamer", Chloé Bourgeois in "Antibug", but excluding Gabriel Agreste\Hawk Moth, who akumatized himself in "The Collector" into the titular villain.