Az wasn't used to using his own power and was becoming tired already. He fired his own blast back, but that only stoped one, the other two hit him and he flew back. He flipped in the air and landed on his feet and balled fists.
He darted at her again, this time on a ceruving path, he activated his armour cloak and became invisible. He was totally silent, not making anything kind of sound at all.
He snuke around to Zero's side and jumped on her, his feet landing on her shoulder, still cloaked he manged to land a few heavy blows to variuos parts of Zero's upper body.