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Gru, voiced by Steve Carell, is the main protagonist of the "Despicable Me" franchise. Initially introduced as a supervillain known for his grand heists, Gru undergoes a significant transformation as he becomes a loving father to three adopted daughters. Throughout the series, Gru's character evolves, showcasing his capacity for kindness, compassion, and family values, while still retaining his quirky and humorous nature.