[Wow! If they knew that was all it took to get Sans riled up they would have done it a long time ago. When Chara was ticking all of the other characters off like a list he had...gone quietly into the night, so to speak. But that's how things only went for them. It could be different! They'd LOVE it to be different =)

Chara doesn't flinch under his words and it's likely by this point he might realize it's more than just pretending to be an unflappable demon. This "Chara" can't feel a single thing. But when he advances...

* You equip the Real Knife.]

Is that why you made them choose?

[Sans knows what they mean. Both photographs in his possession and he couldn't be nice enough to just give them the better one to Spare Chara's feelings? Only not, because Sans was Sans and couldn't do it himself. It's what to expect from someone who twisted MERCY around like he did.]

Pretty words will do nothing for them Sans. Don't you think they've heard them enough? "I'm sorry." "It won't happen again.". Like Frisk dealing with those in the Underground, they weren't worth much unless they were good. But how do you define 'good'?

[Sparing everyone? Being a perfect person, a narrator with a nice, yet snarky text? Smiling, even though their Partner had to go through a loop of death? Because big kids don't cry.

You are only worth your SOUL, the Underground said to Frisk.

You are only worth something if you are perfect, the Surface said to Chara.

And in the end, they were not.]

If you well and truly wish to do right by Chara, Sans, then you will give them what they want. Not your SOUL if you wondering. There is not much use in that, considering.

[And Chara smiles, wide and happy because they're always happy.]

Buttercups, once upon a time, worked wonders. Or you can take matters into your own hands. There is only one way this will end, after all.