If Grim Reaper was protecting the fake Li Teng, attacking Li Teng would be a death sentence for him.
The question is, why would Grim Reaper want to protect the fake Li Teng?
Could it be...
Li Teng was afraid to continue this train of thought.
"Am I the clone?"
"How is that possible?"
"I am clearly myself, I have all my memories, I'm so smart, I'm so... not handsome..."
"No way, he's the real one? I'm the fake one?"
"That's absolutely impossible!"
Yuan Qiang had said in the blood letter that the fake Li Teng was just a piece of data!
That Grim Reaper must also just be a piece of data that was copied incidentally.
So, there's nothing to make a fuss about.
Just continue the mission, end this story arc, and he could return to his own body.
Li Teng tried hard to convince himself.
...
The fake Li Teng coughed a few times clutching his neck, and judging by his expression, he seemed not quite clear about what had just happened, nor why the female ghost suddenly fled.
