Who is the main enemy of the movie coco?

In the movie "Coco," the main antagonist is Ernesto de la Cruz, a famous musician who is revealed to be a fraud. He initially appears to be a beloved figure and Miguel's idol, but as the story unfolds, it's revealed that he is responsible for the death of Miguel's great-great-grandfather, whom he betrayed. Ernesto's desire for fame and immortality leads him to steal the songs and legacy of others, making him the central conflict in Miguel’s quest to honor his family's true history.