Yes, that is lucky...perhaps he was only permitted to kill one person, and opted for the perceived biggest threat? One has to wonder why they've only been killing once nightly, after all...they could simply slit all our throats and have done with it.

[ being that. they are all asleep. ]

...Again, sloppy work. If you must kill someone in their sleep, have the decency to do it so they die on the first stroke. Still, it's good he was sloppy...it'd be annoying if you were to die.

[ that's as close to aw she cares as she's getting re: it being good he lived i guess ]