Every S-rank raider can release mana pressure, but that means that they can feel and differentiate between mana pressures as well.
That was the reason why Frank was able to tell that there were many S-rank beasts in the army of the beasts when they were facing the boss of the S-ranked special gate.
Same reason why Frank could tell that the pressure released by the boss, or the hidden boss was not something an S-ranker could release.
Monarch was an EX-ranker when he went to the association, and the pressure he released was of low SSS-rank.
That pressure was enough to crush the S-rank raiders to death so when Luna felt the pressure, even as a peak S-ranker, she felt like she was about to die.
No, she was actually about to die, her life flashed through her eyes.
Luna knew at that moment that even if she was strong and she had authority, she was still nothing in front of real power.
