Fireworks teams without common sense don't stay in the business that long. In fact, they're lucky if they stay in the same plane of existence. It's a sure-er death than meeting Truck-kun face-to-face.
Fireworks mid day are a thing. They're typically chosen for sound or smoke color rather than 'star' color. They're made with the same basic methods, but some of the finishing details are different.
wait, the whole rebellion plan was just "blow up Youm when he's giving coronation speech"?? even if our trio didn't find out, i don't think it's gonna work