During a Q&A session with Quancredible, "Black Clover" creator Yūki Tabata shed some light on Luck Voltia's "Cheery Berzerker" nickname. According to him, it stems from Luck's performance in his Magic Knights entrance exam, where he almost killed someone during the combat test. That answers the "berzerker" portion of the alias, but where does the "cheery" part come from? Well, one of Luck's defining traits is that he's almost constantly smiling, no matter the scenario finds himself in. Therefore, it stands to reason that as he beat his opponent within an inch of their life, he had a grin plastered across his face.
Despite his frankly scary abilities and overly-happy demeanor, Luck has caught on as a favorite among "Black Clover" fans. In fact, Reddit user u/Fennekin12062022 ran a poll that asked fans of the show what they think of Luck, and the results clearly skewed in one direction. Of the roughly 2,000 votes received, only 15 of those voters consider him awful, 32 think he's bad, and 509 are on the fence. Somewhere in the neighborhood of 2,500 individuals think he's good, and 258 would name him their favorite character. The comment section below the poll leans in Luck's favor as well.
Luck Voltia, aka "The Cheery Berzerker," is a popular yet flawed character who has left an impression on most "Black Clover" fans. Whether that impression is positive or negative clearly varies from person to person, though most have come to appreciate him for one reason or another.