Fallen Jedi turned Sith Lord and Separatist leader.
Dooku is Anakin's first major defeated opponent in the film.
Anakin and Obi-Wan battle Count Dooku aboard the flagship, and Anakin decapitates him at Palpatine's insistence.
Obi-Wan participates in the battle that removes Dooku from the conflict.
Obi-Wan fights Count Dooku with Anakin during the rescue mission aboard the flagship.
Palpatine sacrifices Dooku to advance Anakin's fall and his own plan.
Palpatine insists that Anakin kill Count Dooku during the flagship confrontation.
Related entry on Wikidata (Q51727), public domain (CC0).