U can
U can make any kings or queens as u want
But u need to know that
The kingdoms only have one queen no kings or have one king no queens
A kingdom can't have one queen and one king
That's rare to see a kingdom have king and queen
queen Carol and king King (yes his name is king) is an exapmle
But king King died
Tsunami had to kill him without knowing
They all in the same power
Bc they are starters
U can level them up
U can also get one another dragon in hatchery
Deadly nadder
Monstrous nightmare
Gronckle