I am curious about the luck dragon properties. Maybe the other children of the rainbow gain small traits of being part luck dragon for example they always get the perfect hand in Uno against most people or always know what side teh coin will flip just that the dragon hatchings have such high luck by nature of them being basically mini luck dragons. They have it more than the rest of the rainbow.
The Royal Clutch are the luckiest of the Rainbow due to their inherent Dragon genes amplifying their Lucky genes.
The rest of the Rainbow is also uncanny in how lucky they are, though they are not as inherently Lucky as the Clutch. It's the rainy season and Leona's cubs want to play outside? The clouds are clearing and suddenly it is nice and sunny. Azul installed an extra security lock with pick-proof pins? Those Cecelia girls are escaping with relative ease. Vil's chicks really want to go out with their father? Well, now Vil is trying to figure out how the four of them managed to slip into his bag without him noticing (and Grandpa Eric is having a full-blown meltdown trying to find them).
Any game of luck played by the Rainbow is suddenly won regardless of who they play (excepting each other). The Rainbow playing against one another typically result in evening out the playing field. The Royal Clutch typically win even against the rest of the Rainbow. All of them lose playing against the Human.