Continuing with the cliche of the female geek with dark hair and glasses, I'm using this cute image of Margo from the Despicable Me franchise. She is one tough twelve-year-old.

Jeanette Isabelle
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I'm not sure whose twisted idea it was to put hundreds of adolescents in underfunded schools run by people whose dreams were crushed years ago, but I admire the sadism. -- Wednesday Adams, Wednesday