Yikes... thats gonna leave a stain.
After exiting the ruins, and into Snowdin, you heard footsteps behind you, following you. As you neared the bridge to Snowdin town, you felt someone grip your shoulder.
"Hey..." A small, soft and menacing voice came behind you. "Don't you know how to greet a new pal? Turn around... and shake my hands." What are you going to do?! This was scary, this was bad!!
You turn around anyway and shake their hand. Before you had time to see who it was, they held a ketchup bottle. The cap on the ketchup bottle they're holding is loose, and it spills all over your hand/clothes.
"hehe... the old ketchup on the hand trick. it's ALWAYS funny. Anyways, my name is Chara. Chara Dreemurr. You're not from the underground, right?" They pause. "I'm supposed to be on guard duty, but I don't really feel like it, let's just uhh.. go through this bridge."
They push you across the bridge. "Welcome to Snowdin, new pal! Right over there is where I live with my brother Asriel!" They grinned. "Don't try anything suspicious though, okay? Let me introduce you around town then!"