In crossover events, Kara Danvers, or Supergirl, interacts with Flash and Arrow. She introduces them to Clark and Lois, recognizing their true identities. The twist comes when she discovers Oliver is the Flash and Barry is the Green Arrow. Kara's appearances on DC's Legends of Tomorrow are also due to these events. Her romantic interests include Adam Foster, James Olsen, Mon-El, and William Dey.