These Prison Walls (An Arrow: Season 7 Fanfiction)

Despite the best efforts of keeping the identity of the Green Arrow and Athena hidden secret, the world now knows who they are.

Billionaire Oliver Queen and his sister, Evelyn Queen, have been convicted of several murder charges, including breaking and entering to highly-protected government facilities, among other numerous charges.

Amongst pressure to free Oliver and Evelyn for their hero vigilante work in Starling City, Oliver Queen is incarcerated in Slabside Prison, with Evelyn serving a short stint in Iron Heights Prison for her numerous charges.
When Evelyn returns from prison, she is disillusioned by the justice system, not to mention their handling of the Green Arrow/Athena situation, and she retires, only to be pulled back into the mix when Oliver is released from prison, with Ricardo Diaz 'The Dragon', becoming a serious threat.

Now the whole world, including their beloved Starling City, now named Star City, knows who they are. But the newly unmasked heroes are not out of the woods yet.
More secrets come to light as an old sibling of Oliver's and Evelyn's makes her impression on Team Arrow, along with a brand new threat in place of Diaz: The Ninth Circle, led by wealthy gangster Dante.

New and old friends of Team Arrow return, with an explosive showdown between Oliver, Evelyn and their long-lost half-sibling just around the bend.