Juniper

No you won't... Sans will keep killing you, tiny hitler, over and over and over again...

until you finally quit and leave and never come back... and he can go and properly mourn the lives you have stolen and the deaths of all he held dear at your hands.

This is his vengeance, bucko. Just as much as it's Toriel's Vengeance, or Undyne's, or Papyrus'or any of theirs...

When you play Genocide route... you willing step into the yawning gates of hell.

So...don't complain when the Devil comes out to say hello.

I'm not complaining,

I'm persisting, every time I die, I'm a step closer to the end.

Only a few more steps and everyone will be finished.