Papyrus is a Lethal And uncontrolled Royal Guard commander and he cares little about the well-being of other monsters, and will not hesitate to slaughter anyone just to set an example. He will also kill anyone who threatens him or Sans directly while being sober. He does yell at Sans and they fight a lot. However, He does love his brother even though he doesn't show it. He tries to toughen Sans up in the harsh world of Underfell. He is the very opposite of his UnderTale counterpart.