Luka Couffaine (aka Viperion) is a character of Miraculous Ladybug. He is the older twin brother of Juleka Couffaine, the guitarist of Kitty Section, and a new student at Collège Françoise Dupont, who attracts the attention of Marinette Dupain-Cheng.
In "Silencer", when Bob Roth threatens Marinette after she accuses him of stealing Kitty Section's idea for XY's new song, he is akumatized by Hawk Moth into Silencer, a voice-stealing supervillain.
In "Desperada", after Adrien Agreste gives up being Aspik for not being able to help Ladybug against the titular villain, she gives Luka the Snake Miraculous. When the Miraculous is inhabited by Sass, he becomes Viperion, a snake-themed superhero who helps Ladybug and Cat Noir during "particularly difficult missions" in Season 3.
In "Truth", after Marinette refuses to tell him her secrets, Luka is akumatized and amokized by Shadow Moth into Truth, a three-eyed supervillain that forces people to tell the truth and his emotions form the giant eye sentimonster.
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