cassie heavily idolized donna troy, the original wonder girl, and to that effect wore a black wig over her natural blonde hair (it also helped to conceal her identity). donna gave cassie the second costume she wore as wonder girl, but cassie was afraid to wear it lest it were ruined. she has been trained by artemis, the former "stand-in" wonder woman. as wonder girl, cassie joined young justice due to her crush on superboy. she became close friends with arrowette, secret, and empress. during her time with that group the dark god oblivion caused wonder woman's wonder dome palace to destroy gateway city. artemis ordered cassie to help with crowd control instead of wasting time putting on her wonder girl disguise. agreeing with her, cassie revealed her secret identity before news cameras for the first time in her superhero career. towards the end of the young justice series, cassie became the leader of the team, after beating robin during an election for command due to inner team tension following the recent revelation of batman's , yj uncomfortable with the idea that robin had similar plans to use on them. her secret identity was again publicly revealed when the second silver swan attacked her at her high school.