She might be normal, I guess, but she's hardly plain. Girls god balls. She marched right into the middle of a gangster's hideout and demanded to know they did with her brother. Even after finding out her brother was in the middle of a gang war, even after being kidnapped, her determiniation never waivered. She cut a deal with a ganster she just watched shoot a man dead in front of her and never batted an eye at it.
Sure, she isn't a fighter, doesn't have a gun or knife, and she's hardly the completely fearless sort, but she's far from being forgetable. I mean, yeah, she isn't doing circus-freak flips on the back of a moving train, but it takes more than being a fighter to be an Interesting Character.