Although dragons are naturally uninterested in religion, as they can grow into the most powerful beings in the multi-universe without relying on any external force, learning to be self-sufficient and self-serving from the moment they hatch, they neither seek assistance from divine beings nor pray for mercy.
Regardless, for Bahamut and Tiamat, who created the Metal Dragons and Colorful Dragons, many Metal Dragons will pledge allegiance to Bahamut, at the very least show respect and pay tribute, while Colorful Dragons may fear, respect, admire, and flatter Tiamat.
Even Tiamat, after several years, only managed to persuade two Green Dragons to join Leon. Of course, a few years mean nothing to dragons, as they pass by with a slight delay.
In this case, Isily is just a young Silver Dragon, how could it be so easy to convince Grianna, an adult Silver Dragon, to submit to a Red Dragon.
