The most Badass scene from any anime character I've seen? That would have to be near or at the beginning of SAO season 2 when Sinon was sniper the guy with the machine gun. When she jumped from the building, getting her leg shot off in the process, and still managed to make the shot with her sniper and survive the fall with a tumble roll was awesome! She's so cool and badass for a number of reasons throughout the anime that I can't count them all.
Grenade Hug!!!
