Allfiend

John's heart nearly leapt out of his chest upon hearing these words, but he barely managed to keep a calm face and steady his heartbeat as he stared at Allfiend with a confused expression.

He bowed his head slightly as he spoke out.

"Sect Leader Allfiend, I'm not sure what you're asking," John replied, acting dumb.

"Who are you?" Allfiend repeated after a moment of inspecting John. "You were a no-name outer sect disciple, but you suddenly made a monumental rise through the ranks of our sect, all the way to becoming an Emperor. How did this come to be," Allfiend explained.

John's body quickly relaxed, as he realized Allfiend was just looking to see how he came to be so powerful, and not that he detected John's disguise. 

"Who am I? I'm just a lowly disciple born in a small village who managed to have a lucky breakthrough at the borderlands, which enabled me to achieve this rise in status and power," John explained.