So King, Queen & Jack are all epithet that they acquired for having the position of All-Star?
That makes me think that...
King and Queen is proly the longest reigned All-Star among them. Being called King the Wildfire that really suits his ability of producing flame. And Queen the Plague for his hobby to make weapons and viruses.
While Jack the Drought, his epithet is apparently opposite of his race, a brindle bass fishman(self-explanatory).
What bothered me when OP Vivre Card Databook was released 10 months ago, Jack's age was also revealed and he is only 28 y/o. I realized that the present Jack was only 8 y/o when Beasts Pirates attacked Kuri 20 years ago. With that said, the present Jack proly was just eventually promoted to All-star after defeating/replacing the former Jack when they occupied Wano.
Another Supporting Facts:
•In Ch 979, you won't see any traces or silhouette of Jack when Oden's forces fought Beasts Pirates.
•Jack is quiet and reserve because he is looked down and bullied by King & Queen. This is often happened to newbie.
And do you think Tobi Roppō has at least 1 member who has the ability or characteristic that's connected to Drought?