C1401 An Unsurpassed Realm

I am curious about the nickname of the Dark Pearl, why did that man call her the Great Demon King?

I asked, "Oh right, who is that you?"

The black pearl replied, "Subordinate."

I asked, "Why are you called the Great Devil King?"

She said, "Code name."

I said, "Great Demon King, it's quite appropriate."

The black pearl replied, "Generally."

I asked