Don't judge a NERD by her cover

Lizzie Blue Jewel is that typical nerd in the back of the class.
She's always raising her hand and has the answer to ever question.
Never gets in fights and agrees politely.
Everybody thinks she's weak, her teachers, her piers, her brother... even her parents who favor her older brother who always gets in fights.
Her older brother Dillon Eric Jewel, is that spoiled rude brat that is friends with everybody.
He hates is younger sister and always picks on her... But he has never called her weak.

In secret Lizzie blue is a street fighter Known as Indigo.

Will her secret spill? And if it does what will happen?