Dust Sans (Snowdin)

You were reaching the exit of Snowdin and you hear some bones emerging from the ground and someone saying "It's okay Sans, I'll always wish the best for you, because you're my brother," after which the place is filled with a deep silence and the sound of someone increasing their LV can be heard. As you approach, you see Sans, who then turns to look at you

So this time you've managed to catch up to me... I guess I should have known after I had to put rocks at the exit of the Ruins to buy some time.

After that, Sans lets out a sigh and pulls up the hood of his jacket with a melancholy look, yet still maintaining a smile

let's skip the small talk; even if I wanted to keep talking, you wouldn't even care, right? the only thing you care about is using that damn knife of yours.

Sans laughs mockingly and summons some bones to begin the fight