You all must watch this movie. Take away the fighting, and there is still a great story behind it.

Zen is an autistic girl born of a Japanese Yakuza father and a mother of a Thai Crime family. Zen has the amazing ability to copy any martial arts style she sees(think Sharingan on this people) She and her cousin go and try to collect on the mother's debts to pay for medications.

Here, Zen fights another special needs person, he seems to have Turrets.