I'm not sure. My friends were born with them, but their powers were awakened, somehow. Most of Lucas' powers were about healing and protecting us, while Kumatora was more aggressive. It might have to deal with their personalities.

[Yeah.]

Anyway, Lucas had a special power that allowed him to wake the Dark Dragon, and I was there to keep him safe. You know, fighting and lowering enemies' defenses.

[Because when your party members can deal more damage, Duster's role in boss fights is to debuff, debuff, debuff, attack a bit.]