@thegentelman Um, she's an assassin, not a fighter. Second, male versus female physique. Third, the two male characters seem to be two of the best assassins in their line of work. Good job not using your brain, Mr. Gen"tel"man
These people are really trigger-happy, to an almost childish degree, as if the author is trying to make the story more gritty with shock-and-awe tactics.
But the phone trick was pretty cool, so I'll cut it some slack