Kings
Emperors
Monarchs
These three titles were common in the world of Mortals but in the world of Immortals, they signified something else entirely.
The leaders of Kingdoms like the Scorching Sun Kingdom and the Supreme Sea Kingdom are called Kings.
Meanwhile, the leader of Empires like the Supreme God Empire, the Mortal Empire, and the Celestial Empire are called Emperors.
As for Monarchs, they were myths and legends in their universe.
Emperors are beings that are either Tier 9 or they're on par with Tier 9s.
As for Monarchs, it's believed that they're beings that have surpassed Tier 9 and had reached the fabled Tier 10. However, this was wrong.
Top Tier organizations like the Empires knew that Monarchs were half-step Tier 10s, not true Tier 10s.
However, the difference between a half-step Tier 10 and a Tier 9 was so vast that it was said that a hundred Tier 9 could never defeat a half-step Tier 10.