I kind of have an idea for the Dazzlings. It also reflects on the reason why despite having similar powers (absorbing negative energy from people), they can have abilities that work slightly different than each other too? Like certain negative emotions that they get the most satisfaction from? Something like...
Adagio Dazzle - Anger/Jealousy/Hatred (even more than average?)
Aria Blaze - Stress/Devastation
Sonata Dusk - Depression/Sadness
I also had the idea of each of them having some type of “title” around the old ages like ancient Greece or and ancient Egypt. Something like...
Adagio Dazzle - Messiah/Goddess of the sun
Ari