User blog comment:MetallicArcher/Fabulous Blake!/@comment-49.145.13.85-20140716160137/@comment-177.128.106.113-20140717105018

Dust seems related to elements, like Weiss said "Fire, water, lightning, energy!"

Semblance is some kind of unique power that is personal to each individual.

Aura is the "life" energy that everyone has and can be used in some ways, like force field, healing and pretty much for atacks as well.