A Former Member of Pandemonium Troupe

...

"It must be Diablo," said Zero with a confident tone, making Shin and Faker turned to him with a slight frown.

For Zero to have that kind of tone when naming the mysterious enemy that was hiding in the dark, it must mean that he was very familiar with that person.

Zero knew what they were thinking and quickly answered. "As you already know, I am investigating the Pandemonium Descendants and especially paying close attention to each member of their strongest group, the Pandemonium Troupe."

"I can't say that I am very familiar with each of them since they are skilled at hiding their tracks. But it doesn't mean that my investigation was a failure."

"I managed to infiltrate one of their bases and happen to witness the meeting of their higher-ups. And from the information that I've gotten from that time, the Pandemonium Descendants are composed of 3 major groups, the Elders, the Penumbras, and the Troupe Members."