Of course he's cool. You would be too if you wore that outfit every day. He'd only take that thing off if he absolutely had to. Oh well, at least he washes it. And by that I mean he wear it in the shower. 

Anyway, cool or not, Papyrus tries real hard. Like he keeps trying to be part of the royal guard. One day, he went to the house of the royal guard and begged her to let him in it. Of course, she shut the door on him becuase it was midnight. But the next day, she woke up and saw him still waiting there. Seeing his dedication, she decided to give him warrior training. It's, uh, still a working progress.

Oh yeah, I wanted to ask you something. 

*voice lowers and sounds more serious than usual*

Have you every heard of a talking flower? Yes? So you know all about it. The echo flower. They're all over the marsh. Say something to them and they'll repeat it over and over. What about it? Well, Papyrus told me something interesting the other day. Sometimes, when no one else it around, a flower appears and whispers things to him. Flattery..., Advice..., Encouragement..., ...Predictions. Weird, huh? Someone must be using an echo flower to play a trick on him. Keep an eye out, okay?

*very slow and unnerving voice*

Human. Don't you know how to greet a new pal? Turn around and shake my hand.

*Main character takes your extended hand, woopie cushion in the hand goes off*

*voice shifts into a much more laid back and relatively friendly manner*

Heheh... The old woopie cushion in the hand trick. It's always funny. Anyways, you're a human, right? That's hilarious. I'm Sans. Sans the skeleton. I'm actually supposed to be on watch for humans right now. But... Y'know... I don't really care for capturing anybody.