amighost:

Alphys is the kind of person who needs time to really open up to someone. When she meets someone for the first time she starts to stutter, and talk about cartoons, because that’s the one thing she’s comfortable talking about. After a while, she calms down, though, and stops acting as shy and nervous, and when you really get her to open up, she’s a really fun and nice person.

Sans is the exact opposite. At first encounter, he’s already 100% chill, and acts really open and honest about himself, but then it’s like walking into a brick wall. And he sure as hell won’t let you through that wall unless your name is either Papyrus or Toriel.

As for Papyrus, you have to give him time to lay that “I’m the best”-attitude aside, and show you who he really is. Turns out who he really is, is actually the best, just not in the way he wants to.

Undyne loves and wants to protect every monster citizen in the Underground, so if you’re a monster it’s probably not gonna be that hard to befriend her. She’s brutally honest, though, which makes her sound kind of rude sometimes, and if she really likes you she’ll want to wrestle with you. But she’s nice and doesn’t really have anything to hide.

You’ll befriend Asgore in a whim as long as you let him make you tea. But really getting to know him for real takes a long time, perheps years. He only opens up to those closest to him, like those he conciders his family.