Death Eater
Having gone through the horrors of the second wizarding war as a Death Eater, Draco abandoned the pure-blood beliefs he was originally devoted to, and grew to become a better person than he was in his youth, growing more tolerant and accepting of the non-pure-bloods of the wizarding world. He also made sure to discipline his son Scorpius to be a better child than he himself was in his youth, which made Scorpius to show kindness and become friends with Harry's son Albus Severus, as evidence of his reformation.