Answer:
Edmund was never truly evil like the White Witch was, but he was easily tricked because he was a spoiled and greedy child.
Step-by-step explanation:
Most of Edmund's conversion occurred because of external factors—the Witch's cruel behavior and petrification of the animals at feast or the conversation with Aslan. Ultimately, it is up to Edmund to redeem himself and complete his transformation. This change takes a tremendous force of will and courage, but in the end, Edmund finds freedom.