Shen Che is a materialistic young man who only likes to deal with dead people.
Su Yunqing is an old goblin who has lived for thousands of years (ahem, he is an immortal or an immortal)
Shen Che: "Why are your hands so cold?"
"Holy crap! Why is it you again?"
"I have reason to suspect you and will find evidence to arrest you."
"I seem to have fallen in love with my suspect..."
Su Yunqing: "But I just want to follow you and protect you..."
For the living, I speak for the dead, that's all.
Purpose: To speak for the deceased