@DrakeyC
“Started”? Irrationality (insisting on a carny game she knows from the start is rigged) and rage were her thing from day one. One could argue that even her blinding pride makes an appearance here too with “I really don’t like to lose.”
It also worths nothing that unlike other characters where his/her rage hardly affects anything outside of looking bad or having anger as a supplementary flaw resultant from other main flaws; her temper is both her defining flaw and very often it does make her life difficult when she blows everything up.
@Background Pony #D029
Actually, if anything I think this would be appropriate. Sunset’s fatal flaw has always been her temper. That’s not the kind of thing that just goes away, just like that…. and if it did, it would only result in a very boring character anyway.