Kars (カーズ Kāzu) is the main antagonist of Part 2, Battle Tendency.

Kars is the leader of the Pillar Men, and the designer of the Stone Mask. His goal is to evolve further to become immune to the sun's rays and thus he seeks the Red Stone of Aja to empower his Masks, battling the Ripple users for its possession. He is ranked 1st out of all of the Pillar Men.

As the creator of the Stone Masks and Vampires, Kars is one of the more influential characters in the series; his invention having far-reaching repercussions for a number of major characters such as Dio Brando, the Joestar Family and the Zeppeli Family.

Kars is also a major character featured in the light novel JORGE JOESTAR as he meets Joji Joestar and obtains many Stands throughout the novel. He creates his own and more superior versions and naming them Ultimate Stands, making them stronger than their original versions.