Hero

A Hero is a person who is admired or idealized for courage, outstanding achievements, or noble qualities. They are someone who is heroic and does heroic actions. This also includes making good decisions are also compromising and killing the villains. This also means being merciless/ruthless to villains if the hero has to kill a villain.

Trivia

 * In Star Wars: The Clone Wars the Confederacy of Independent Systems are the heroes of the show, as well as the antagonists, opposing the main protagonists/villains, the Jedi. Grievous is a major heroic antagonist in the series.
 * As well in the series, biased director Dave Filoni favors the Jedi alot to where he makes the show to perceive the Jedi as "heroes" and the Separatists as "villains". While the Separatists are the heroes, they do have villainous people inside of their faction (eg Dooku), but the Jedi are evil for their actions against heroes, like Grievous, and Trench, and various other Separatist members but Filoni continues to pass it off as if they're "heroes".
 * What makes Grievous a hero in Star Wars: The Clone Wars, is his backstory, his goals & his heroic actions of killing all Jedi for wronging him on his planet and killing thousands and millions of his people.