Banshee

in young justice the team is formed by the sidekicks of the main heroes... Black Canary has a sidekick too Amanda Starin. She and her baby sister were the daughters of a star lab scientist internship of Harrison Wells, when the great explosion hapened he was killed and the girls with their mother moved to Gotham city and were under the wing of Batman who was helping them. Not a year later their mom was murdered by a joker attack so the billionaire took in the girls and started training Mandy who appeared to be his first apprentice. Soon Bruce took in another orphan Richard and that made her even more asocial and dysfunctional and that was the trigger for Bruce to get her a true family. Thats when Oliver Queen steps in as he suggested as mother known to all of them... Helena Bertinelli former huntress and her husbant Victor Sage the question who retired from the league. So finally the girl had a mother they deserved and Mandy was continueing her training with Black Canary and Oliver queen.

I only own banshee