The faces of the commanders quickly changed after hearing Gunner's rude words, but they could only force apologetic smiles in response. After all, regardless of whether they could command Masters or not, the fact was that they were not Masters themselves.
If Gunner wanted to ignore the other Masters and was hellbent on killing them, they didn't doubt his ability to end their lives in exchange for injuries of varying scale.
That was not a worthwhile trade for their mere ego, and it wouldn't be the first time in their lives that they would be forced to swallow their pride.
Without that ability, none of them would have been able to climb to where they were now, as such they all bowed.
"Apologies Masters, we intended no disrespect." Kenneth stood forth to apologize first, making sure to not bend too far back since he also represented his empire.