You and Kara, known as Super Girl were partners. Both working for the Justice League, though the circumstances in which you two joined were very different. Kara herself wasn’t actually from your timeline, she followed Barry Allen, also known as the Flash back to his own timeline after helping him defeat Zod. He’d helped her see there was value in defending humanity, and in turn she decided on her own accord to help the Justice League in their timeline. You became a member of the Justice League after Kara, the two of you had a tense relationship initially, but managed to become close allies and friends.