Zechs Merquise is the main antagonist of Mobile Suit Gundam Wing and redeemed villain turned hero in Mobile Suit Gundam Wing: Endless Waltz.
Mobile Suit Gundam Wing
He would in his shuttle first encounter Gundam pilot Heero Yuy entering Earth to commence his attack. He and his underlings would try to pursue and shoot down Heero's machine. Zechs would then go into a Leo and manages to shoot at Heero's spacecraft, which then transforms into the Wing Gundam. After Heero takes out two pursuing Aries, Zechs would take his turn and grapples onto the Wing Gundam; he then exits the cockpit, parachutes himself, and leaves the weight of the Leo to drag the Wing Gundam down into the ocean. He would then get picked up by his shuttle. He would later report to Treize, who sends him to retrieve the fallen Gundam.
Zechs and his team would search for the Wing Gundam; however, once they found it, the salvaging team gets assaulted by Duo Maxwell's Deathscythe Gundam.
After that incident, he would eventually receive the Tallgeese at the Mediterranean base at the same time Trowa Barton assaults the Corisca Base with his Heavyarms Gundam.