In Episode II, which Jedi Master defeats Jango Fett in the arena battle?

The story behind the answer

In the Geonosis arena, the purple-bladed Jedi Master leads the strike team, confronts Count Dooku in the stands, and later decapitates Jango Fett after the bounty hunter’s jetpack is damaged when a rampaging reek slams into him. Yoda doesn’t engage Jango at all—he arrives with clone gunships to evacuate survivors and then duels Dooku. Ki-Adi-Mundi and Plo Koon are part of the Jedi assault but are not shown fighting Jango.

Context: Jango is the genetic template for the Grand Army of the Republic and guardian to Boba; his death directly sets Boba on the path to becoming a feared bounty hunter. The purple lightsaber became iconic after actor Samuel L. Jackson requested the color so he could spot himself in large battle scenes.