Setting: A world of horror instances and rule-based ghost stories.
1. Reunion:
Si Yan is a player. He keeps a blank expression throughout the instance. When a ghost chases him, he just says, "Oh," and keeps walking. System: [Host, aren't you afraid?] Si Yan: "...It's fake."
Then he turns a corner and runs into Lin Mumu, an NPC whose setting is to scream and run away whenever she sees someone.
When Lin Mumu sees him, she opens her mouth to scream, but a strange syllable comes out of her throat: "Gaaah!"
Si Yan: "..."
"Gaaah! What are you doing here?!"
Si Yan: "...That's what I should be asking you."
Lin Mumu: "Don't worry about that right now! Run! I'm an NPC! My setting says I'm supposed to scream and chase players when I see them!"
Si Yan: "...Then chase me."
Lin Mumu: "Like hell I will! I can't bring myself to chase you! Hurry and go! Otherwise, the System will force me to run!"
As soon as she finishes speaking, Lin Mumu's body starts chasing Si Yan against her will. She runs and cries, "Don't run so fast! I can't stop!"
Si Yan walks ahead at exactly the same pace as before, but the corners of his mouth lift by 0.5 centimeters.
System: [Host, you're smiling.]
Si Yan: "...No, I'm not."
2. Teamwork:
Si Yan solves the puzzle while Lin Mumu frantically drops hints beside him: "That door! Something's wrong with that door!"
Si Yan: "...I know."