In Vesir's eyes, if "Dominating Ash" counted as an ability, then ranked from highest to lowest in that ability, it should be her > Vishy > Diya > Sonia.
Note, this was only describing the level of ability, not actual combat power. If they were talking actual combat power, Sonia was without question the strongest king with the highest damage output; Ash was simply helpless before her—if saying Multistar Supreme was willing to share the world with Ash sounded far too risky for anyone to believe, then saying Ash would hand the entire world over to Sonia after becoming the Artifice Supremacy in the future would make everyone think it was only natural.
Rather than saying she was Ash's sweetheart or comrade-in-arms, it would be more accurate to say she was Ash's emotional pillar.
But this had nothing to do with Sonia's ability, just like if you were walking down the street and a treasure fell on your head, could you call that a reflection of your talent and hard work? Vesir was absolutely certain that all the girls—note, not only the Operators, but also Veela, Black Crow, Purple Moth, and all the others who were not present—would never acknowledge Sonia's position. In terms of time spent together, in terms of shared adventures, anyone had more substance than Sword Maiden; even Vishy was no less than Sword Maiden. Sword Maiden's only advantage was time.
And yet time decided everything.
They met the best version of each other at the most beautiful time, so they had the most beautiful story, one no one could ever replace. Sonia did not need to think about how to dominate Ash at all, just as Ash would never think about how to control Sonia. From the bottom of their hearts, they both felt they belonged