Gekka Ryuzoji

The scenery outside the window gradually changed from high-rise
buildings of the city to fields and mountains covered in silver.

"I joined the Crime Victims’ Relief Committee 6 years ago–"
Ryūzōji suddenly started his monologue. "Since then, I have been
writing the techniques of the 'Black Challenge' cases. In most
situations, the formation of the 'Black Challenge' generally
requires several people creating and adjusting it, and ultimately
Shinsen Mikado controls it."

He continued revealing sensitive info in a casual manner, as if he
is making small talk. He must be confident that his position will
not be shaken even if I knew his secrets.

The fall of God-like detectives—

Once again, it hit me hard to learn this fact from Ryūzōji himself.