This man was just a world overlord. Although she was a serving girl, she was indeed from an impressive background just like what Ye Zi had guessed. Since she was able to work in the Heaven Immortal Tower, she would naturally have an extraordinary background.
In the Supreme Ancient Immortal Realms, there were many major powers that were half-clan and half-sect. They treated their clan as the core but they wouldn't neglect accepting disciples with great talent. They had subordinates, disciples and even servants. After the passage of countless years, these would all evolve into major powers.