When he learns that the power of the well will cost the servant her memories, Jinbei goes into the well after her. She was prepared to lose her memories but Jinbei persuades her not to.  When she leaves, Sanada Yukimura is there...
Then there'd have been nothing for us to do.
No hubiéramos podido hacer 
nada en esa situación.
No hubiésemos podido hacer 
nada en esa situación.
Daí não teria nada que pudéssemos fazer.