Dinah Lance (Earth-51022015)

Dinah Lance is the ex girlfriend of Oliver Queen (Earth-51022015). Just mere weeks before his parents were murdered, Dinah dumped Oliver due to his arrogant and egotistic personality. But when she found out about the deaths, she found Oliver at his house, clearly upset by the loss. Afterward, Oliver secretly became the Batman. Not long after he became a hero, he saved Dinah from a mugging, and helped her back home. When she asked how he knew where she lived, he told her, "You're a good friend, Dinah." This made her figure out that Oliver is Batman, even if his suit uses voice altering technology. She goes to him and gets trained by him, becoming his partner Catwoman.