[quote=@Eventua] 
So perhaps by lampshading the edginess and having her not necessarily be taken as a serious threat? Perhaps because her powers are fueled by negative emotions she's not actually that strong in comparison to the others and has to try and learn the virtues of 'not being shortsighted' and 'focusing every waking moment on being a force for change is just going to burn you out and make you more miserable'...
[/quote]

That could work. I'm doing something similar myself with Kyōka, since she's basically meant to be a bit of a deconstruction/eventual reconstruction of the usual socially insecure junior high student with conveniently absent parents who gets to be a magically empowered hero and tries to do her best to fight evil, come what may. In her case, she accepts the offer and takes her role just as seriously as your traditional shy character in a mahou shoujo anime, but her family issues, social awkwardness, and insecurity don't just go away because of that.

(I'll just conveniently leave out the part, by the way, where I planned exactly none of this and just kind of decided on this as my intention retroactively. XD)