All characters

Happy Quinn

Played by: Jadyn Wong in Scorpion

Happy Quinn, a genius mechanical engineer who can fix anything. She is the sole female genius of the group. She has feelings for Toby but is afraid to act on them because he is one of her best friends. Happy was put in foster care as a baby by her father because her mother died in childbirth and he couldn't cope. As a result, Happy is very hostile. In Season 1, she tracked down her father and reunited with him.