Invader.
To be honest, the moment Yu Sheng heard this term, his heart was already in turmoil.
When he learned that the Shadow Angels could appear in the real world, and when he heard the phrase "another planet" from Song Cheng, he realized that those twisted beings, dubbed "angels," could be far stranger and more powerful than he had imagined.
However, he never expected that these beings might even come from... beyond the world itself.
He had always thought that these entities were just another kind of bizarre phenomenon from another realm, at most a more dangerous "super entity."
"... No wonder Little Red Riding Hood advised me to avoid any involvement with the Shadow Angels," Yu Sheng couldn't help but mutter softly.
Song Cheng heard Yu Sheng's murmur but said nothing, instead continuing to place more documents on the coffee table in front of them.
"I also brought a few more files on Shadow Angels, but it's not everything. Some Shadow Angels have the ability to 'leak' information just by knowing their names, and these can only be mentioned and studied in the Special Operations Bureau's 'safe house.' Then there are some Shadow Angels that have been classified as forbidden for other reasons, and even I don't have access to them. However, you can take a look at these; looking at them is harmless."
Yet Yu Sheng did not immediately reach for the documents as before.
Instead, he suddenly asked curiously, "Why are you so concerned about me? I bet you wouldn't just hand out these sorts of files to other spiritual world detectives, even if they have encountered Shadow Angels."
Song Cheng thought for a moment.
"Because we suspect that you have the power to expel 'angels.'"
Yu Sheng instinctively sensed that this might be part of the reason, but not all of it.