Board Thread:General Discussion/@comment-96.233.74.45-20140413040730/@comment-3146930-20140413215036

Some people may not have an affinity for various forms of combat that have been shown so far (namely weapons, Aura, and Semblance). Ren for example didn't do much damage with his weapons, but has shown a surprising control of his Aura. Weiss hasn't shown any strong Aura skills, but seems to have a strong grasp of Semblance control, even if she uses her weapon to activate it. Ruby has been shown to have a strong talent for weapons, but she doesn't seem to have complete control of her Semblance and hasn't shown any Aura skills above the norm.

You also have to consider that maybe not everyone has a Semblance fit for combat. Someone could have a Semblance that allows them to understand any language, or the ability to be immune to fire, or maybe someone else that can talk to machines. All of these would be useful Semblances, but not always on the battlefield.