What if Dragon Guards send Outcast dragons to Stramba island when they were younger can in canon where they were around 15, Rayas being 8.
There would be 1% chance that Stramba would have took pity of them and raised them and ending to regret it alot.
So... here´s grumpy-daddy Stramba 7 adopted kids, Rayas, Madax, Negro, Saimin, Dorn, Aneh and Rojo.