All
Whole
The hat crowns the king, because all kings must have one.
ぜん
すべ, まった
None
But, as you're going through all the kings, it turns out not all of them have hats after all. The last one you come to is hatless. He's the king of Zen (ぜん). He has simple clothes and a shaved head, unlike all the other fancy kings standing around nearby.