Old Friends (Young Justice)

Athena Patterson was best friends with Richard Grayson when they were in Haly International Traveling circus. Then His parent died and he got adopted by Bruce Wayne and became Robin. When he join the young justice he went under cover and they met again. A lot of things have changed since they last saw each other. Like Athena getting powers. Were they ever meant to be friends or even something more? And why was Athena given powers?