AD-W4

AD-W4, also referred to as Ay-Dee, is a minor villain in the Star Wars Universe. He is the main antagonist of the Jedi of the Republic - Mace Windu  comic series. He is a greedy and bloodthirsty mercenary droid.

History
Shortly after the beginning of the Clone Wars, AD-W4 was approached by the General Grievous, the cyborg supreme commander of the Seperatist droid armies. Grievous hired Ay-Dee to oversee the Separatist operations on the planet Hissrich, a job the droid mercenary only accepted after Grievous noted that there would likely be someone, probably Jedi, to kill during the mission.

While on Hissrich, AD-W4 was informed of the arrival of a small team of Jedi, consisted of Jedi Master Mace Windu, Kit Fisto and Prosset Dibs, and recently promoted Jedi Knight Rissa Mano, when they ambushed one of the droid patrols. AD-W4 learned of this when a B1 battle droid reported it to him. Later on, Rissa accidentally activated a droid scout, which gave AD-W4 the chance to set up an ambush for the Jedi. During the ambush on the four Jedi, AD-W4 faced Mace Windu in single combat. As they fought, both combatants criticized their opponent's motivations; Windu regarded the droid's greed as a sign of depravity, whereas AD-W4 viewed the Jedi's beliefs—in particular their commitment to peace—as asinine. The robot mercenary eventually bested Windu for a few seconds and escaped. Upon returning to his base, he attempted to increase his payment by lying to General Grievous about besting and killing Windu. Grievous, however, was not fooled and demanded Windu's lightsaber as proof, which forced AD-W4 to take further action against the Jedi.

AD-W4 was soon confronted by Mace Windu a second time. As they fought, Ay-dee attempted to bait Windu by acusing him of hypocrisy, as well as secretly enjoying his new role as a warrior and military leader. Although Ay-Dee managed to briefly overpower and disarm Windu, he was ultimately no match for the Jedi Master's Force abilities and was critically damaged. He also rejected Ay-Dee's claims against him, asserting that his virtues were influenced by altruism and the concept of right versus wrong. Realizing that he had lost, AD-W4 detached his head from his body in an attempt to escape, but Windu managed to blow up Ay-Dee's s head using the Force, finally putting an end to the droid mercenary.

Personality and traits
AD-W4 was a tall, fearsome droid of an unknown model, with red sensors and purple plating with red markings. He was a greedy mercenary who was known for his literal worship of credits, which he regarded as the one true ruler of the galaxy. He was also sadistic and bloodthirsty, and had a penchant for murder, particularly Jedi. According to General Grievous, he was also known for having a "flare for the dramatic."

Ay-dee was disdainful of the Jedi Order, regarding its members as arrogant and their beliefs—particularly their commitment to peace— as asinine. He also disliked the Separatist battle droids he was assigned to command, viewing them as stupid and totally expendable, an attitude not unlike that of his final client, General Grievous.