Seeing the giant robot on her side lets him just pretend it's another battle. A less terrifying one than the one he was in, but still a battle between robots. Now... what an this version of Zearth do?

First thing to do is to find a weak spot. If there isn't one, make one. Ushiro grins, and tries to pretend that he's more dramatic than he is. Ugh okay just pretend it's an anime or something.

"Rakunda!"

Even if he can't hurt her too badly, at least this'll even the playing field a bit.