They could do that, or they could definitely not, because swords aren't something anyone in the castle needs--though right now, maybe someone could, in case Frisk can't get food and their nose leads them forward...

The rest of that catches up to them, they think. The last part.

A switch is flipped. Frisk roars.

"NO!" Doesn't matter why, they aren't going near any monsters as things are right now! Their friends aren't things to be taken hostage to hurt them! They--

--Something in their chest makes a disgustingly wet crack.