I believe that a would healing so fast that can be seen through naked eye should hurt more than getting inflicted with the wound... but she didn't feel anything. Oh well, it's not like anything here is scientific.
The way the guy described an Angel is on point to every Angel race in every fantasy story... They don't sound good at all, they kill mercilessly, no matter if you have good intentions, as long as you are labelled as evil/bad.