Kars is one of the two overarching antagonists (alongside Diavolo) of the JoJo's Bizarre Adventure franchise, serving as the overarching antagonist of JoJo's Bizarre Adventure: Phantom Blood and the main antagonist of JoJo's Bizarre Adventure: Battle Tendency. Being the leader of his band of Pillar Men, he is also the creator of the Stone Masks and the cause of Dio Brando's rise as the main antagonist of the series, making him the catalyst of the whole series.