Here's why:
* Motivation: The Evil Queen is driven by envy and a desire for power. She is obsessed with being the fairest in the land and cannot bear the thought of anyone else surpassing her beauty.
* Actions: She attempts to kill Snow White on multiple occasions, first by hiring a huntsman and then by disguising herself as an old woman and offering Snow White a poisoned apple.
* Impact: The Evil Queen's actions lead to Snow White's exile, her near-death experience, and ultimately, the need for the prince's intervention.
While other characters like the Huntsman and the Dwarfs play important roles in the story, the Evil Queen is the driving force behind the conflict and the one who poses the most direct threat to Snow White's well-being.