Thanks for getting back to me. Holy crap, I didn't realize I was so spot-on with my guess of an 85% critical fail rate o n the male twin! LOL!
As for the HP thing, I can see it getting redder on body parts for me, and bleeding for the enemies (or saying destroyed) but it doesn't say how much overall HP one has. I made one enemy's entire body 'destroyed' and he was still alive, for example. It's a very convoluted system, imo.