I keep seeing that trope about Asian girls and having a streak in their hair, and wanted to add my two cents in.
Three Delivery was an under-rated Western gem. This is Sue Yee, who has strait black hair and was more than capable of defending herself. Considering the show took place in China Town, most the characters were also Chinese, maybe with some American thrown in.
In fact, the ‘trope’ was worn by a guy. Her adopted brother, Tobey.
I also remember it being natural, and it’s his bangs.