[season 3 intro]  Kara Danvers : My name is Kara Zor-El. I'm from Krypton. I'm a refugee on this planet. I was sent to Earth to protect my cousin. But my pod got knocked off course, and by the time I got here, my cousin had already grown up and become Superman. I hid who I really was, until one day when an accident forced me to reveal myself to the world. To most people, I'm a reporter at CatCo Worldwide Media, but in secret, I work with my adopted sister for the DEO to protect my city from alien life and anyone else that means to cause it harm. I am Supergirl.

Kara Danvers : [Season 1 Opening]  When I was a child, my planet Krypton was dying. I was sent to Earth to protect my cousin. But my pod got knocked off-course and by time I got here, my cousin had already grown up and become Superman. And so I hid my powers until recently when an accident forced me to reveal myself to the world. To most people I'm assistant at Catco Worldwide Media. But in secret, I work with my adoptive sister for the DEO to protect my city from alien life and anyone else that means to cause it harm. I am Supergirl.

[once The Flash is revealed to be in National City]  Cat Grant : There's a new superhero in National City. This is huge; direct competition for Supergirl. Kara Danvers : He doesn't have to be... competition. Cat Grant : Would you prefer... a sidekick? Barry Allen : No, not a sidekick. More like an equal, or an ally... [Winn pats Barry's shoulder]  Barry Allen : ... a new partner, maybe? [Cat stares stoically; Barry nods]  Barry Allen : Speaking was the wrong choice. I see that now.