Draco Malfoy
Draco Malfoy is similarly constrained by fate as Harry is. Yet unlike Harry, Draco was brought up with an arrogance implanted in him. Draco lives in a world that is profoundly dark, both in terms of the magic he favors and the emotional toll it has on a young lad. Draco had grown up hearing tales about Harry Potter - especially allegations of his skill as a Dark wizard - since his early years were characterized by his family's tragedy.
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Draco first extends a warm welcome to Harry due to these stories. Also, he knows that his dad would embrace a pure-blood warrior with abilities comparable to Voldemort's. However, his efforts to befriend Harry fails. And for Draco, Harry's rejection cements his position as an adversary, since he realizes his father's expectations are misplaced.
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However, it is his attitude toward others that exemplifies Draco's malice. From his torments on poor Neville to his snide remarks about the Weasleys, labeling Hermione Granger a Mud Blood and driving Buckbeak to death, it is safe to say Draco Malfoy is not a kind person. Still, as J.K. Rowling demonstrates, he has some 'unextinguished good.' We begin to get glimpses of it as he develops throughout the story.